... - ANS-Plano rx is a +6.00 base curve
More minus = lower base curve
More plus = better base curve
... - ANS-the higher the index of refraction the thinner the lens can be
... - ANS-You will ALWAYS experience all your prescribed SPHERE power
... - ANS-You will feel no cylinder strength at the prescribed axis
1.Forty nine - ANS-Index of refraction of CR-39
1.523 - ANS-Index of refraction of crown glass
1.58 - ANS-Index of refraction of polycarbonate
1.Sixty one - ANS-Index of refraction of barium (blue hue; jumbled together crown glass
bifocals)
1.Sixty nine - ANS-Index of refraction of dense flint glass (yellow hue)
1.70 - ANS-Index of refraction of Hi lite glass
150 mm - ANS-When ordering a six inch temple, its corresponding millimeter price is which of
the following?
A. One hundred thirty five mm
B. 140 mm
C. 145 mm
D. One hundred fifty mm
A - ANS-A +three.00 lens has the subsequent prismatic impact at 10 mm below the gap optical
center:
A. Three diapters base up
B. 3 diapters base down
C. 1.5 diapters base in
D. 1.Five diapters base out
A - ANS-A lens which reads +three.00 -2.00 x180 is decentered in 6mm an excessive amount
of. How an awful lot horizontal prism is created by this mistake.
,A. 1.Eight diapters base in
B. 1.Eight diapters base out
C. .6 diapters base in
D. .6 diapters base out
A - ANS-A minus lens moved downward from the number one role will bring about
A. Base up prismatic impact
B. Base down prismatic effect
C. Base in prismatic effect
D. Base out prismatic effect
A - ANS-A patient refracted at 15mm is prescribed a -10.00 shpere. The dispenser reveals that
the actual becoming distance will be at 10mm. What must the compensated lens strength be?
A. -9.50
B. -nine.75
C. -10.Seventy five
D. -10.50
A - ANS-Given a lens with a focal period of 1000mm / determine the energy of the lens.
A. One diapter
B. Five diapters
C. Ten diapters
D. One hundred diapters
A - ANS-If a couple of lenses are gound with diapters of base in prism in each lens, the affected
person will experience
A. Four diapters of prism base in
B. 2 diapters of prism base out
C. No prism
D. None of the above
A - ANS-If a patient is sporting a +12.00 diopter sphere and the adjustment is made to move
them towards the eyes, what effect will which have at the powerful energy of the lens?
A. Decrease the plus strength
B. Increase the plus electricity
C. Cause base in prism
D. Cause base out prism
A - ANS-If the right temple is angled up the impact on the frame may be to
A. Lower the proper facet
B. Raise the right facet
C. Loosen the proper temple
D. Push the the front far from the eye
, A - ANS-In neutralizing a lens of unknown strength your first studying is +1.00 and the
subsequent reading that focuses the cylinder goal is -0.25.
What is the RX?
A. +1.00 -0.25
B. -0.25 +2.00
C. +1.00 -1.25
D. +0.25 +2.25
A - ANS-Overall frame measurements are said in
A. Millimeters
B. Centimeters
C. Decimeters
D. Meters
A - ANS-The focal duration of a +5.00 Diapter lens is
A. 20 cm
B. 50 cm
C. 39.37 inches
D. 2 meters
A - ANS-The P.D. Written on the order is mistakenly mentioned as 70mm, when the real
dimension should be 66mm. What undesirable prism would be located if the distance
prescription is O.U. +5.00 shpere.
A. 1 diapter base out/each eye
B. 1 diapter base in/each eye
C. 2 diapters out/each eye
D. 2 diapters in/each eye
A - ANS-The refractive astigmatism indicated through the RX +1.50 -1.00 x one hundred eighty
is
A. Compound Hyperopic
B. Mixed
C. Simple Myopic
D. Antimetropic
A - ANS-When verifying an upload on on a 1 piece bifocal with a lens clock, a +2.00 add could
clock ____
in the distance and ______ within the phase.
A. +6.12/+eight.12
B. +four.50/-7.25
C. +4.37/+7.12
D. +three.75/+1.00