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12 Cards in this Set
- Front
- Back
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The base curve of a certain contact lens is equal to 7.5 mm radius of curvature. The equivalent power in diopters is? |
45.0 Diopters |
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When moved 5 mm from its original position the effective power of a 10 D lens will change |
0.50 Diopters |
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Another name for a scleral lens? |
Haptic lens |
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PMMA lenses were first invented by who and when? |
Kevin Touhy 1947 |
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CAB- cellulose acetate butyrate was first utilized as a contact lens when? |
1974 |
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HEMA- Hydroxyethylmethacrylate is referred to as what type of lens? When was it FDA approved? |
Soft lens FDA approved 1971 |
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The base curve is also known as? |
The central posterior curve (CPC) or the primary base curve |
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Where is aqueous fluid created? Name a mineral in it? |
It is secreted by the lacrimal glands. Contacts ions and minerals such as sodium and potassium. |
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What is the primary function of the lipid layer of the tear film? What produces lipid film? |
Prevent evaporation of the tear film. Produced by the meimbomian glands. |
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What is the primary function of the mucoid layer of the tear film? What produces the mucoid layer? |
Co convert the hydrophobic epithelial layer of the cornea to a hydrophilic surface. Produced by goblet cells. |
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B.U.T....tests for what? |
Quality of tears |
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What is the rose bengal used for? |
Colors degenerating and dead epithelial cells. |
