Questions with Correct
Answers
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, What is the first procedure in lensometry? - Answer ✅Focus the eyepiece
How long should the tear film remain uniform over the cornea after a normal blink (tear break-
up time)? - Answer ✅10-15 seconds
For a progressive addition lens to work properly, what is the minimum fitting height? - Answer
✅24mm
Polycarbonate lenses do not need ___________ coating, since their surfaces already have this
property. - Answer ✅Ultra Violet
The index of refraction for a polycarbonate lens is ________________. - Answer ✅1.586
The normal visible iris diameter (VID) is _____________. - Answer ✅10.5-12.5 mm
An office must meet core objectives to be awarded incentives by Medicare and Medicaid for
using electronic health records. - Answer ✅15
Plastic lenses transmit ___________ light _____________ glass. - Answer ✅slightly more; than
When measuring a lens, you find that the target sphere lines focus at -2.25 D with the cylinder
axis wheel at 93 degrees, and the cylinder lines focus at -4.75 D without changing the cylinder
axis. What would be the presentation of the lens? - Answer ✅-2.25 -2.50 x 093
The smallest unit of lens measure is generally - Answer ✅0.25 Diopter
Which type of light does a photochromic lens not absorb? - Answer ✅Infrared