QUESTIONS AND VERIFIED
CORRECT ANSWERS
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the angle of incidence, for which the angle of refraction is 90 degrees is called the : - CORRECT
ANSWER-critical angle
what is the most commonly used prescription for correcting esotropia caused by muscle
imbalance - CORRECT ANSWER-base out prism/ one eye turns inward(sometimes both) a prism
displaces an image towards its apex
what happens to vertex distance for evey1 diopter increase in base curve? - CORRECT ANSWER-
increases approximately 0.6mm
how much does the 5/8 inch steel ball weigh for preforming a drop ball test for dress safety
lenses - CORRECT ANSWER-6/10 ounce
cataract spectacle lenses are best if they are made with what? - CORRECT ANSWER-aspheric
curves/lenses
when is astigmatism against the rule - CORRECT ANSWER-is said to be against the rule if the
steepest meridian of the cornea or crystalline lens is near the horizontal meridian