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7 Cards in this Set
- Front
- Back
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Given the following information, which of the following set of lens specifications would best stimulate a lid attachment rigid lens fitting? 42.00@180/ 43.00@90 Rx: -2.00-0.87x180 Upper lid positioned 2 mm below the superior limbus
A. 41.50 -1.50 9.5 B. 42.50 -2.50 8.5 C. 43.00 -2.50 9.5 D. 43.00 -3.00 8.2 |
A. 41.50 -1.50 9.5
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K's 42.00@170/ 43.00@80 Rx: -3.00-1.00x170 Given the Rx and K's the following diagnostic toric soft lens was used: 8.0 -3.00-1.00x180 during the diagnostic evaluation, the above lens rotated 10 degrees clockwise. The lens ordered should have an axis of:
A. 10 degrees B. 160 degrees C. 170 degrees D. 180 degrees |
D. 180 degrees
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A patient is diagnostically fit with a rigid gas permeable lens with the following parameters: 42.00 -3.00 9.5 If you wish to flatten the lens to cornea relationship, which of the following lenses would you order?
A. 42.00 -2.50 10.0 B. 42.50 -3.00 9.0 C. 43.00 -3.50 9.0 D. 43.50 -3.50 9.0 |
B. 42.50 -3.00 9.0
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One of the primary functions of soft contact lenses at the beginning of their usage was as a:
A. Treatment for keratoconus B. Treatment for dry eyes C. Bandage lens D. Treatment for astigmatism |
C. Bandage lens
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Which of the following are most likely to cause small punctate stains on the corneal epithelium?
A. Apical clearance B. Tight lenses C. Loose Lens D. Foreign bodies |
B. Tight lenses
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The range of the keratometer may be extended to 61.00 D. This may be accomplished through the use of an auxiliary trial lens with a power of:
A. +1.50 B. -1.50 C. +1.25 D. -1.25 |
C. +1.25
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The highly regenerative layer of the cornea is:
A. Bowman's membrane B. The endothelium C. The basal membrane D. The epithelium |
D. The epithelium
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