Addition
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A figure used to determine the additional prescription strength needed for correcting near vision for those with presbyopia. |
Acuvue
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A brand of contact lenses manufactured by Alcon. |
Alcon
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A manufacturer of contact lenses. |
Air Optix
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A brand of contact lenses manufactured by Ciba Vision.
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Astigmatism
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Is a condition of the eye caused by an irregular curvature of the cornea, resulting in blurred and unfocused vision.
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Axis
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A value that determines the direction needed to correct astigmatism on a contact lens or glasses prescription.
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Base Curve
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The curvature of a contact lens in millimetres used to determine the fit of the lens on the eye.
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Bausch & Lomb
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Healthcare manufacturers of contact lenses, lens solutions and eye drops.
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Bifocal
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A lens that contains two prescriptions, often distance at the top and reading at the bottom.
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Biofinity
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A contact lens brand by CooperVision.
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Ciba Vision
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A manufacturer of contact lenses. Now known as Alcon.
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Coloured Contact Lens
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A lens tinted or coloured for wear.
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CooperVision
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A manufacturer of contact lenses.
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Cornea
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Is the front part of the eye, which covers the iris and the pupil it is transparent and helps protect the eye from dust, germs and other harmful matter.
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Cosmetic Contact Lens
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A lens tinted with colour or with a fashionable design such as country flags, or movie eyes.
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Cylinder
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A figure required for patients with astigmatism that shows what level of correction is needed.
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Daily Disposable Contact Lens
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Is a lens designed to be worn for one day and then disposed of.
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Deposits
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Are debris or protein build up on the lens surface.
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Diameter
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The distance in millimetres from one end of a contact lens to the other. A value used in a prescription.
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Dioptre
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A unit of measurement used in optics to determine the refractive power of a lens.
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Disinfectant Solution
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A solution used to disinfect contact lenses.
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Dominant
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A value required for multifocal contact lenses to determine which the dominant eye is referred to as the “D” value. The non-dominant is referred to as “N”.
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Enzyme cleaner
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A solution used to remove protein from the lens surface, can also occur in tablet form, in which the tablet is mixed with saline or disinfecting solution as directed.
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Extended Wear
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A contact lens designed for extended wear, is one that can be worn overnight.
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Fashion Contact Lens
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A lens tinted with colour or with a fashionable design such as country flags, or movie eyes.
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Focus Dailies
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A brand of contact lenses produced by Alcon.
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Glaucoma
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A condition which causes gradual sight loss due to pressure within the eye.
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Hyperopia (long-sightedness)
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The loss of near vision but the ability to see into the distance clearly.
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Iris
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The coloured portion of the eye.
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Long-sightedness
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See Hyperopia.
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Monthly Disposable (Monthlies)
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Is a lens designed to be worn daily for a month and then disposed of.
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Multifocal
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A lens that corrects both short and long-sightedness, by using two different surface areas to correct near and distance vision.
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Myopia
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The loss of distance vision but the ability to see objects up-close clearly.
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Ophthalmologist
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A medical doctor that specialises in the treatment and diagnosis of eye diseases, and who is licensed to perform eye surgery.
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Optician
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A medical practitioner licensed to fit and supply glasses and contact lenses.
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Optometrist (OD)
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A medical practitioner trained to fit and supply glasses and contact lenses, as well as diagnose and treat certain eye diseases.
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Oxygen permeability
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The level of oxygen that can pass through the lens surface to the eye.
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Plano
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A contact lens made without a prescription usually for cosmetic use, such as a coloured contact lens.
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Power
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The value used to determine the strength of visual correction needed. This is sometimes referred to as the sphere.
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Presbyopia
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A degenerative condition of the eye that affects the near vision, it usually occurs in those over the age of 40's.
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Proclear
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A contact lens brand produced by CooperVision.
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PureVision
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A brand of contact lenses manufactured by Bausch & Lomb.
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RGP (Rigid Glass Permeable)
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A rigid lens made from a harder material than soft lenses, usually prescribed for patients with an astigmatism or irregular eye shape as they are thought to be better at correcting vision in these cases.
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Rinsing Solution
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A lens solution used to clean the lens before wear.
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Rewetting Solution
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A solution used to rewet the lens to increase comfort during wear.
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Solution
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A liquid solution designed to rinse, clean and store soft or gas permeable contact lenses.
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Short-sightedness
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See Myopia.
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Silicone hydrogel
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Is an advanced soft lens material that allows more oxygen to reach the eye than traditional soft hydrogel lenses.
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SoftLens
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A brand of contact lenses produced by Bausch & Lomb.
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Sphere
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The value used to determine the strength of visual correction needed. This is sometimes referred to as the power.
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Toric
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A contact lens used for correcting astigmatism in patients.
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Two Weekly Disposable
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Frequent replacement lenses designed for wear daily over a two week period before they should be disposed of.
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RX
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Prescription.
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Visibility Tint
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A light tint to the contact lens that helps the wearer with handling.
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