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20 Cards in this Set
- Front
- Back
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Hypoxia |
Oxygen deficiency. |
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Toric lens |
Contact containing two powers and therefore must have an axis of orientation. |
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Keratitis |
Inflammation of the cornea. |
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Keratoconjunctivitis |
Inflammation of the entire area of the cornea and conjunctiva. |
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Monovision |
A single vision lens for distance in the dominate eye, and a single vision near rx for the other eye. |
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Orthokeratology |
A technique of straightening the cornea using hard retainer lenses. |
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Photophobia |
Light sensitivity. |
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X-chrome lens |
A red contact lens which aids the color deficient patient. |
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Taco test |
Procedure to determine if a soft contact lens is inside out. |
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Circumcorneal indentation |
Ditch like depression around the limbus caused by a tight lens. |
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Circumcorneal injection |
Redness around the limbus surrounding the cornea. |
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Enzyme cleaner |
Used to remove protein deposits from the lens surface. |
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Corneal ulcer |
A defect of the cornea caused by hypoxia, trauma or infection. |
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Loose lens |
A small or flat lens that has excessive movement. |
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Prism ballast |
A thickening of the bottom of the contact to prevent rotation. |
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Truncation |
Cutting a small portion off the bottom, to stabilize a toric contact lens. |
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Sagittal Vault |
The space between the central posterior curve and a flat surface. |
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Spectacle Blur |
Blurred vision immediately after hard contact lens wear. |
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Edge stand-off |
Space between the lens edge and the cornea, caused by a loose fitting lens. |
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Elasticity |
The ability of a contact to stretch and return to its natural shape (Tensile strength) |
