I have forgotten my password. How do I request a new one?
Please ensure you have disabled CAPS-lock and that you enter the correct characters by trying to type in another window or word processing program. Next step is: Forgotten your password? click here. You can use your customer ID to create a new password. Your customer ID appear on all invoices we send you and is emailed to you after you open an account. If you need help, feel welcome to Contact us.
I need lenses for one eye only. Can I order?
Yes, if you require one box only, then untick one of the left or right prescription boxes. If you require a larger quantity, then simply choose identical prescription on both 'eyes' as they can be used on the same eye.
I want to try a lens. Can you supply a free sample?
Unfortunately, we are not supplied with sample lenses. We advise you to consult with an optician regarding your suitability for a lens, they would also normally supply sample lenses and follow up with a physical consultation to ensure that the lens is suitable to your individual needs.
I am interested in coloured lenses. Do you supply colour charts?
We do not offer colour charts as they cannot convey with 100% accuracy the true colour of a lens and do not take the base colour of the wearer into account. We recommend a trial fitting with your optician if you are interested in a particular brand of coloured lens, and to check the manufacturer's website, for example Ciba Vision.
I want to delete my account, how do I go about?
We cannot delete the account for accounting purposes, but if you no longer wish to have correspondence you may unsubscribe from the newsletter directly by 'edit account' (untick the box "Please keep me on your mailing list"), or by using the "unsubscribe button", or reply to our emails.
How can I find my lens?
1. Locate either make or material name on your sample package. (E.g. make: 'Focus Dailies' material: 'Nelfilicon A'). If you are using lenses for the first time or planning to switch to a new type of lens, we cannot advise what lenses to use as this requires a physical consultation. We recommend you to contact your optician about deciding on a brand of lens as they normally also will supply samples.
2. Type the name of make or material into our 'search' field and hit 'enter' to get results.
3. Double check that water content, base curve and diameter on your samples matches the lens you found on Vision Direct.
How do I place an order?
1. Go to New account details and fill out the requested details.
2. Choose currency. British pounds is the default currency. Click the US flag for dollars or the EU flag for euros.
2. Use the "search" field or navigate through the site to find the items you require.
3. Choose quantity, then prescription. Add the required items in your basket.
4. Proceed to checkout, where you choose shipping option and verify your delivery address before proceeding to payment.
Vision Direct offers a general stock indication online, but you can also prior to ordering contact us by live chat or telephone for a more specific update. If any of the goods ordered are not available, we will normally inform you expected time of arrival via email, so be sure to add email@example.com to your safe senders list. Before the order is dispatched we will upon request either swap to another item if possible, or cancel the order and refund anything paid to us. If customers request a partial shipment via courier, the balance of the order will be sent by standard mail service at Vision Direct's expense (surface delivery) unless we inform of otherwise.
Shipping, tracking & delivery
Vision Direct offers various delivery options. You can find all charges and current shipping destinations here. Quotes for delivery other than stated will be supplied on request. We state courier delivery times both when you place the order and here. You can find information of unexpected shipping delays in our news section
Always check that your delivery address is correct as a first point of action, if you contact us preferably by live chat we can amend the address if your order has not yet dispatched. Unless otherwise specified in your dispatch confirmation email, dispatching is done through Royal Mail 1st class (for delivery within UK). We ask that you allow a minimum of 10 working days for delivery in conditions of sale. If you ordered by courier, please contact the courier company directly if you have a tracking number (eg.DHL or DPD). If tracking is available, we normally email this information to you. Contact us if you don't have a tracking number. For addresses within EU, please allow 1-4 weeks from dispatch for delivery to take place, if nothing else is stated. For addresses outside of EU, please allow 1 - 6 weeks on average for standard/surface delivery.
Within EU, an express service is available for a delivery within 1 day from dispatching*. Dispatch takes place subject to availability and clearance of funds and excludes weekend or public holiday delivery services. Vision Direct advises use of a work address for express or courier orders. Furthermore, note that Vision Direct may decide to send any order by special delivery or courier requiring a signature as proof of delivery instead of by regular postage methods. It would be indicated in the dispatch confirmation email and there is no additional charge for this.
For delivery charges to other destinations than listed online, prices may vary depending on weight so please email us what goods you require and your delivery address for a quote.
If you have not received your delivery, you must contact us within 90 days of dispatch.
* For express orders, please refer to cutoff times stated in our shipping policy. Some orders are dispatched in more than one package (back ordered) at no extra charge to you.
Your site won't accept my card. What's wrong?
When entering credit card details, please take great care that they are correct.
The credit card number is the long number across the middle of the card, (Not the 'Card No.' printed at the bottom) and should contain no letters. Enter the expiry date. "Issue number" should be entered for Switch cards only.
Vision Direct does not accept American Express nor laser cards.
You can alternatively make a bank transfer, stating your order number as a reference. Please note that it may take some days for the money to come in, depending on your bank. Please email us when you have made the transfer so that we can follow up, or if we can help in any other way.
Detail for transfer:
Account name: Vision Direct UK Ltd
Sort Code: 56-00-03
BIC: NWBK GB 2L
IBAN: GB09 NWBK 5600 0379 3490 72
Address: Piccadilly, London W1
I try to submit my order but it keeps loading the same page. What is wrong?
1. Do 3 hard refreshes (ctrl + F5) then retry.
2. If you used a reorder link, place your order from scratch instead.
3. Try to clear out your cookies, or try to use a different web browser or computer.
4. If you still get the same problem, you are possibly using a link to items that no longer exist. Most likely, there are discontinued items in your basket. The easiest way to verify this, is to search for the product in the "search" field and read the related product information.
I have finished my order but haven't been asked for payment information.
Please click on 'Checkout' to proceed to the payment stage. You can always double check your payment status by logging in, go to My account and then Order history. Your orders with status will be displayed there.
I'm not sure if my order has gone through.
You will receive an on screen message at the end of the order process informing you of your order reference. Please allow 5 minutes for payment to go through, especially if your computer is slow. Do not click the 'authorize' button more than once as this may result in order duplication. Order confirmation is then automatically emailed to your email address. You can best add firstname.lastname@example.org to your contact list to ensure our emails reaches you.
You can always double check your payment status by logging in, go to My account and then Order history. Your orders with status will be displayed there.
Is credit card payment on your website safe?
Yes, your payment will be done via a secure transaction. You can verify this by looking at the address field in your browser, a secure address starts with 'https://'.
I have not paid for my order and want to cancel or delete it.
The order cannot be deleted for accounting purposes, but is automatically cancelled within 2 weeks if you don't complete payment.
My credit card statement shows a greater amount then my order total. What's going on?
All prices are initially displayed in British Pounds Sterling. To view in dollars, please click on the US flag. To view in Euros, please click on the Euro flag.
If you order in a different currency to your region, your card issuer will charge you a currency conversion fee. However, if you believe we have charged you with an incorrect amount, please contact us
I have not received an order confirmation. Will one be sent?
Yes, an automated email is sent to your email address once you submit your order but you also see a confirmation on screen when payment has been completed. The email may take a few hours on some occasions. You may want to check your SPAM folder and mark email@example.com as a safe sender to ensure you receive our future correspondence.
Wrong goods sent
Vision Direct will ship out correct goods as soon as possible. Customers meanwhile return the incorrect goods free of charge with original packaging to the freepost address that came with shipping note from original order. We recommend to keep proof of postage if possible.
Returns address UK: Vision Direct Freepost ANG 7847, BEDFORD MK41 1BR
Outside UK, please write to: VISION DIRECT, POSTBUS 37030, 1030 AA AMSTERDAM, NETHERLANDS
Wrong goods ordered
Customers can return unopened boxes of lenses to Vision Direct's freepost address if within the UK. We recommend to keep proof of postage whenever possible and to include a covering note to request a refund. Meanwhile awaiting the refund, customers can safely place a new order for the correct goods. In case customers prefer an exchange, we request a standard postage & packing fee for your destination. The process can take up to 3 weeks.
Returns address UK: Vision Direct Freepost ANG 7847, BEDFORD MK41 1BR
Outside UK, please write to: VISION DIRECT, POSTBUS 37030, 1030 AA AMSTERDAM, NETHERLANDS
Defective or faulty goods
If customer received goods as ordered from Vision Direct but there are other concerns such as defective, damaged or poor quality of goods, we request in first hand that customers contact us by email. Include invoice ID, description of issue and items concerned, a photo of goods and/or prescription when applicable, so that we can offer as prompt service as possible to resolve the issue.
When agreed by us, goods can be returned for inspection. When it regards contact lenses or other goods that require a prescription, we additionally must have a copy of a valid prescription before any claims are handled.
General Contact Lens information
I have dry eyes: can I use lenses?
Yes. Your optician can recommend suitable lenses, as dry eyes can have many different causes it will depend on the cause which lenses you should wear.
What are contact lenses?
Contact lenses are small plastic (polymer) discs which are curved on the back to the shape of the cornea (the front of the eye) and curved slightly differently on the front to allow them to correct long and short sight, astigmatism and presbyopia.
What are hard lenses (RGP?
"Hard" lenses were the original contact lenses made several decades ago from a plastic called PMMA. For a long time they were the only kind of lens (if you exclude the glass ones developed during the early part of this century and used as recently as Word War II!) but they are seldom used anymore as they have several drawbacks and have been superseded by "Rigid" (also known as "Gas Permeable") lenses. In fact, when people say hard lenses they are most likely referring to the gas permeable type. Gas permeable lenses are similar to hard lenses in design and appearance, however as the name suggests the material they are made of is permeable to gases (most importantly Oxygen and Carbon Dioxide) whereas PMMA is completely impermeable to gases. "Soft" contact lenses are completely different in that they are slightly larger, flexible and made of materials which soak up water. In fact the uptake of water is what allows soft lenses to transmit Oxygen to the cornea, the plastic itself being impermeable. The water also gives them their flexibility - if you let a soft lens dry out it does become quite brittle.
Why does the cornea need oxygen?
The cornea is unusual in that it is transparent - it has to be otherwise light could not enter the eye! The tissues that make up the cornea are able to maintain their transparency partly by not having blood vessels flowing through them. Without blood vessels the cornea must get it's Oxygen directly from the air. The Oxygen first dissolves in the tears and then diffuses throughout the cornea to keep it healthy. Equally important, the waste product of a healthy cornea is Carbon Dioxide which must be disposed of. This diffuses out of the cornea and into the atmosphere in the reverse process. Putting any contact lens into the eye will slow down or possibly stop this process. Without enough Oxygen the cornea will warp, become less transparent, less able to detect pain and can develop scars. Additionally, new blood vessels from the sclera (the white part of the eye) can grow into the cornea and cause further damage and scarring.
What are high water content lenses?
Soft lenses soak up water, and it is this water which allows the eye to "breathe" through the contact lens. Therefore the more water you can make the lens soak up then the easier it is for the Oxygen to pass through it. The original soft contact lenses are now often referred to as "Low Water Content" soft lenses and contain roughly 38% water when hydrated. Manufacturers have spent time and resources perfecting the use of plastics used in lenses and as a result the water content has risen. A lot of lenses now contain between 50% and 60% water and some contain over 70%. The amazing thing is that only 30% of a 70% water content lenses is actually plastic Lenses having over 65% water content are generally considered to be "High Water Content", while those between 50% and 65% are called "Mid Water Content" lenses.
Why aren't all soft lenses high water content?
There are several disadvantages to getting a soft lens to soak up more water. Firstly, because higher water content lenses contain less plastic they are more fragile. Firstly, this either means the lenses are easy to damage or that you have to make them thicker to compensate for the reduced robustness, reducing the effect of the higher water content - thick lenses transmit less Oxygen than thin ones. Secondly, higher water content lenses often tend to attract deposits more quickly making them harder to keep clean. Thirdly, the higher the water content, the easier it is for that water to be evaporated from the lens and cause the lens to become uncomfortable and less clear.
Which lenses are best?
There is no easy answer to this. In terms of Oxygen transmission, soft lens materials range from 8 to 35 units of permeability, whereas gas permeable lenses range from 6 to approximately 200. Therefore, if it was just down to Oxygen transmission, then everyone would have gas permeable lenses. In fact, in the UK the market is the opposite - gas permeable lenses making up only about 15% of the market at the moment and declining. The big advantages of gas permeable lenses is that they allow more Oxygen to the eye in most circumstances, are small so easy to insert, give excellent vision, can correct astigmatism and are long lasting. However, they can be difficult to get used to and are best worn daily to maintain the eyes' tolerance to the lenses. Also they are more easily dislodged from the eye and so are less useful for sporting activities. Soft lenses are more or less the opposite. They are very stable in the eye and hence good for sport. They are easy to get used to and can be used on an occasional basis because of this. However, they do not last as long and some types of vision, most notably astigmatism, are harder to correct with soft lenses. If you want to have tinted or coloured contact lenses, then they are only presently available in the soft variety.
What is astigmatism?
Astigmatism is usually a natural distortion of the cornea which causes it to be more curved in one direction than the other. You can get it with long or short sight and most people have it to some extent. Occasionally it can be caused by a distortion of the lens inside the eye instead of the cornea, but the effect on focusing is the same. Because the cornea (or lens) is more curved along one direction than the other, it acts as a more powerful lens along that direction causing the image at the back of the eye to be slightly out of focus. Astigmatism is corrected by using toric contact lenses.
What is presbyopia?
Presbyopia is the process that reduces the eye's ability to focus on objects close-up as we get older. This is a natural process that is gradual, usually starting to affect most people in their mid 40's, although you may notice this slightly earlier if you are long sighted. It is a totally natural process and is not affected by overwear or underwear of spectacles or contact lenses. Presbyopia is commonly referred to as "long sight of old age", although this is slightly misleading. Presbyopia can be present with long or short sight, as well as with astigmatism.
I have presbyopia - can I wear contact lenses?
Yes. There are several approaches to overcoming presbyopia whilst wearing contact lenses. A collection name for presbyopia corrective lenses is varifocal lenses. You could try wearing a weak pair of reading spectacles over your contact lenses. Alternatively, you can get bifocal contact lenses, which work in a similar way to bifocal spectacles - allowing you to see both far-away and close-up with a single pair of lenses. There is a third alternative called monovision. This technique uses a lens for long-distance vision in one eye and a lens for close-up in the other! It works very well for some people, but is not advised for driving. The fourth alternative is using multi-focal lenses which is a lens with a rainbow of powers to ease the transition on your eyes.
What are disposable lenses?
"Disposable" lenses are those lenses which are designed to be replaced more often than regular lenses. Almost all disposable lenses are of the soft variety. You can replace your lenses yearly, six monthly, three monthly, monthly, fortnightly, weekly and now daily. Lenses disposed of three monthly and above are often referred to as "Frequent Replacement" lenses as well. The advantage of disposable lenses is that they are thrown away before getting too dirty and are therefore more healthy for your eyes. Also, because they do not have to last as long they can be made thinner to improve the comfort, and reducing their thickness further improves the ability of Oxygen to pass through them. Also it may be possible to simplify the cleaning and disinfecting routine as the lenses do not have to last as long.
Why are contact lens solutions needed?
One of the things that you should never forget is that contact lenses are not a natural thing to have in your eyes. Contact lens solutions do three main things. Firstly they clean the lenses to make sure they are as clear and comfortable to wear as possible. Cleaning your contact lenses also removes over 90% of the germs that can grow on them. Secondly, lens solutions disinfect the lenses and lens case. Whilst the lenses are out of your eyes they are easily infected by germs from your hands, tap water, the atmosphere and almost everything else they might come into contact with. The disinfectant kills any germs on the lens to prevent you from getting an eye infection. Thirdly the lens solutions act as a buffering and wetting solution which means the lenses are more comfortable when they are inserted. Almost all modern lenses need to be kept wet to prevent them from changing shape and solutions help to do this as well. Finally, would you put a piece of plastic in any other part of your body without cleaning or disinfecting it regularly,
Do I need to use protein-removing tablets?
Yes and No. The dirt that gets onto the lenses partly comes from the environment (for example dust) and partly from the eye itself. The tears contain many compounds which stick to the lens and need to be removed to keep them clear, comfortable and safe. The four main components from the tears that get onto the lens are fats, protein, mucus and calcium. Using a daily rub-and-rinse procedure on removing the lenses will remove almost all of these four compounds. However, protein is the most difficult to remove and so after a period of several days or weeks a thin film of protein may form on the lenses. Protein-removing tablets are designed to remove this film - note that they will not remove any other type of deposit. Some peoples' eyes produce more protein than others and so may have to use the protein tablets more or less often, also some lens materials tend to attract protein more than others. You still need to clean your lenses daily even if you use protein-removing tablets to get rid of the other types of deposit that accumulate.
Which solution is best for my lenses?
The best solution to use is the one prescribed for you by your practitioner! They will have assessed how often you replace your lenses, what material the lenses are made out of, if you are likely to have any allergies to solutions and many other factors in deciding what solution you should have. Don't change solutions unless told to do so by a practitioner - you could end up damaging your lenses, making them less comfortable or possibly even giving yourself an eye infection. If you think you would like to change solutions then talk to your practitioner first.
Why are contact lens solutions so expensive?
When the original hard lenses first came out it was possible to clean and disinfect them with Savlon! Modern lenses are made of materials which are designed to be comfortable and healthy to wear. Unfortunately this means they need to be looked after a lot more carefully and so the solutions are very specifically designed and formulated formulated to ensure this. Don't forget that all contact lens solutions have to be made in conditions that are similar to those used to make drugs to ensure that they are as safe to use as possible which isn't cheap! Finally, all lens solutions have to a license or have CE marking to be able to be sold. This involves going through many tests to ensure that they are safe to use and effective at what they do - again this is a complicated and expensive procedure. The safety of your eyes is the most important thing -putting a small piece of plastic into your eye is not a natural thing to do - you must look after them as well as possible.
I've been told not to wear my lenses when in an airplane - why?
The air-conditioning found on modern jet-liners is designed to de-humidify the air on board, i.e. to dry it out. This can cause soft, and to a certain extent gas permeable, lenses to dry out and even stick to the eye. This is obviously not comfortable or healthy. You are better off wearing your spectacles while flying.
Do I still need spectacles if I wear contact lenses?
Many people still find spectacles to be a good complement to contact lenses, even though there are contact lenses available for continuous wear. A reason for using spectacles is that to be comfortable with your contact lenses over the years, you can better wear them 6 days a week. Wearing contact lenses is not natural for the eye. Allow it to rest at least 1 day per week.
General Spectacles Information
How do you adjust the frame?
We adjust the frame to your face depending on the pupillary distance you specified on the website when ordering.
What is pupillary distance?
It is the distance between the centres of the pupils in each eye.
What is the range of the correction you cover?
The glasses are available with single vision and progressive eyeglasses in the range of requirements as follows:
- For myopia and hyperopia: -10.00 to +8.00
- For astigmatism: from -4.00 to +4.00
- For Varifocal: from +0.75 to +3.50
How do I know that the frame I have chosen is the right size?
We recommend that you compare the dimensions of your own glasses with the dimensions of frames you have selected. Here is an example of a frame dimension:
How do you set the glasses after their manufacture?
The glasses are preset so that they are suitable for most wearers.
Our technician will control the quality by performing the following adjustments:
- Check that the two branches have the same curve, are parallel and symmetrical
- Check that the glasses occupy the same plane (same axis)
- Check that the nose pads are placed in the same way
Despite these settings, if the glasses are too tight or slip, do not hesitate to visit an optician, they will readjust your glasses.
Do not worry, this type of service is an integral part of the profession of optician and is considered a free service.
Do I have a right to return even if the glasses were made in my prescription?
All returned products must be new, unused and in their original case perfectly intact. All returns must be accompanied by a returns request in writing. If you want to exchange or refund your glasses, it is possible to do so within 30 days from the date of receipt of the product.
What is included in the advertised price?
VisionDirect.co.uk believes in transparency. There are no hidden charges.
Our packages comprise:
- One frame and two lenses of your choice
- Free anti-scratch coating
- UV Protection
- Free Spray
- Free Glasses Case
- Free Cloth & Screwdriver set
What is the difference between progressive lenses & monovision glasses?
The single vision lenses are used to correct myopia, astigmatism, hyperopia and are usually sufficient until the age of 40.
Over the age of 40, varifocals are usually prescribed. This type of lens treats presbyopia:
- The top part is for far vision
- The middle part for intermediate vision
- The bottom part for close vision
What information is needed to order my glasses with progressive lenses?
To order your progressive lenses, you must provide:
- Your pupillary distance
- The value of your addition ( near vision, indicated as ?Add? on your prescription)
- In addition to this, we need other information depending of the type of your correction:
- If you are nearsighted or farsighted, we need the value of your correction called "sphere", indicated as ?Sph? on your prescription.
- If you have astigmatism, we need your sphere (Sph noted on your order), your cylinder (Cyl noted on your order) and the value of your axis (marked A on your prescription)
What is the delivery time of my glasses with progressive lenses? Is it longer?
Progressive lenses are the most complex lenses made for personal use. They require more time for production than monovision lenses. Please allow between 5 and 6 days before we can dispatch these glasses.
Why are some frames are not compatible with progressive lenses?
A frame for progressive lenses must have a minimum height of glass for the wearer's comfort in each field of view (near vision, intermediate vision and distance vision). That?s why all frames are not suitable for varifocal.
My glasses with progressive lenses give me a headache, what should I do?
Headaches associated with progressive lenses can have several origins:
1 - Improper adjustment of glasses: the frame can be positioned too high on the nose, which means that you do not have good vision. We recommend you bring an optician to adjust your glasses.
2 - Addition (near vision) is too strong. We recommend that you make an appointment with your optometrist to correct this correction.
The adaptation to progressive lenses has improved considerably. But they still require a period of adjustment (from 1 hour to 1 week) among wearers.
In the case that adjusting to the new lenses takes longer, we advise you wear your progressive lenses regularly to get used to your new glasses.
How do I use my glasses with progressive lenses in front of the computer?
Wearing glasses with Varifocal requires adaptation as you face your computer screen.
To achieve optimal comfort, follow these tips:
- Raise your chair
- Tilt your screen
Terms used throughout this FAQ
Aspheric - An aspheric lens or asphere is a lens whose surfaces have a profile that is neither a portion of a sphere nor of a circular cylinder.
Astigmatism - impaired eyesight resulting usually from irregular conformation of the cornea; common in nearsighted people.
Balance - term used to describe when one eye has little or no vision (Ex., OD: -5.50, OS: BAL).
Base Curve - a number between 7.0 and 10.0 or a phrase, such as steep or flat, that describes the curvature of the eye.
Bifocal - contact lenses with two viewing zones.
Ciba Vision - manufacturer of contact lenses.
Cleaning Solution - a liquid solution that aids in removal of debris from contact lenses.
ColorBlends - brand name of colored lenses, FreshLook ColorBlends.
CooperVision - manufacturer of contact lenses.
Cornea - referred to as the "window of the eye," it is the outermost layer of the eye.
Corrective Lens - see contact lens.
Contact Lens - thin plastic material designed to fit over the cornea for the correction of a refractive error.
Cylinder - measurement of how much correction is needed for patients with astigmatism.
Daily Wear Contact Lens - contact lenses that are worn for one day.
Deposits - accumulations of substances (usually protein) onto the contact lens.
Diameter - the width of the eye, measured in millimeters.
Diopter - measurement unit of the refractive correction of a contact lens.
Disinfecting Solution - used to disinfect contact lenses.
Enzyme Cleaner Tablets or Solution - see Solution.
Eye Care Provider (ECP) - see Optometrist, Ophthalmologist, or Optician.
Flat Medium - a base curve of 8.6 or 8.7.
Farsightedness - see Hyperopia.
Glaucoma - a condition in which the pressure inside the eye is elevated to a point that can damage the optic nerve and cause a loss of peripheral vision, or blindness.
Hyperopia - a condition in which a person cannot see clearly due to a defect which can have several causes, normally including an imperfection of the eyeball or the lens. Also known as farsightedness, long-sightedness or hypermetropia. Often hyperopia enables seeing at a distance but not up close. Contact lenses correcting this condition are convex and measured with positive (+) powers.
Johnson & Johnson - manufacturer of contact lenses.
Light Filtering Tint - designed for sports use, these tints help objects stand out against a background.
Monovision - technique to limit the effects of presbyopia by correcting one eye for hyperopia and the other for myopia.
Multifocal - a contact lens with more than two viewing zones which is used for correction of presbyopia.
Myopia - also known as nearsightedness, a condition in which a person can see clearly up close but not at a distance. Contact lenses correcting this condition are concave and measured with negative (-) powers.
Nearsightedness - see Myopia.
OD - Oculus Dexter, Latin for right eye.
OS - Oculus Sinister, Latin for left eye.
Ophthalmologist (MD) - medical doctor who specializes in eyes. Can perform exams, treat disease and perform surgery.
Optician - not a medical doctor, but licensed to fit and dispense eyeglasses and contact lenses following written prescription from ophthalmologist or optometrist.
Optometrist (OD) - performs exams, diagnoses and treats disease. In some areas they prescribe, fit and dispense eyeglasses and contact lenses.
Oxygen Permeability - the amount of oxygen diffusing through contact lens material under specified testing conditions.
Peroxide solution - a solution that cleans contact lenses through a chemical process, which often means lenses should be left in solution overnight.
Plano - non-prescription or 0.00 (zero) power.
Power - see Sphere.
Presbyopia - A condition in which a person with age loses ability to focus on objects up close. This is caused by the lens inside the eye losing flexibility as the eye grows older. Presbyopia is normally corrected with bifocal or multifocal lenses, which indicates that additional powers are required in the manufacturing process causing this type of lens to be more costly than contact lenses correcting Myopia or Hyperopia.
Re-wetting Solution - used as a lubricant to increase comfort.
RGP (Rigid Gas Permeable) lens - a contact lens made of slightly flexible plastics that allow oxygen to pass through to the eyes.
Rinsing Solution - liquid solution that removes debris from contact lenses in preparation for use.
R&L Vision - manufacturer of contact lenses.
Rx - prescription.
Solution - there are many different types of solutions, made for different types of contact lenses.
Sphere - a measurement of how much correction is needed, in form of a number on a scale between -20 and +20.
Tint - depending on the contact lens, there are different types of tint such as a handling or visibility tint, light filtering tint, enhancement tint or color tint.
Toric - contact lens designed to correct astigmatism by bearing two different powers at right angles.
Transitions - eyeglass lenses that change from light to dark based on UV rays and exposure to the sun.
Visibility Tint - lightly tinted lenses for easier insertion and removal.