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Costco Optical Department Exam (Latest Exam 2026)
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A lensometer has a standard lens of +22.00D. The target
moves 20.7 mm toward the standard lens from the zero
position. What is the power of the lens? - Answer-+10.00D
A patient's spec rx is +8.00 -3.00 x 180 OD and +4.00 -
1.00 x 180 OS. How much prism is induced in each eye if
the patient looks 10 mm to the right of the lens centers? -
Answer-OD 8^BI
0S 4^BO
Total prism amount = 4^BI OD or 4^BO OS
Static retinoscopy is performed through a +1.50D lens.
The eye is neutralized in the 55 degree meridian at a
distance of 66..67cm, and neutralized in the other principal
meridian at a distance of 40cm. What is the patient's RE? -
Answer-Final rx = plano -1.00 x 055
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A patient presents with keratometry readings of 43.00 @
180/45.00 @ 090 OD. How much astigmatism is expected
on retinoscopy OD, based on Javal's rule? - Answer--2.00
x 180 (WTR)
You are performing a stenopaic slit refraction. You
determine that the patient sees most clearly with the slit
positioned at 180 degrees. With the slit positioned at 90
degrees, a -2.25D spec lens provides the best acuity. With
the slit positioned at 180 degrees, a -0.75D spec lens
provides the best acuity. What is the patient's rx? -
Answer--0.75 -1.50 x 180
Consider a reduced eye model with an internal n = 1.333
and an axial length of 20.5 mm. What is the total eye
power to make the eye emmetropic? - Answer-+65.02D
A -2.00D uncorrected myope views an object at 25 cm.
How much does this patient need to accommodate in
order to see the object clearly? - Answer-2.00D
A patient can read 1M print at distance of 40cm. What is
the patient's equivalent Snellen VA? - Answer-20/50
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A plano convex lens with a radius of curvature of 1.5cm
and n = 1.523 is sitting in air. What is the power of the
curved surface? - Answer-+35.00D
How much light is lost to reflection at the front surface of a
lens with n = 1.45 that is sitting in air? - Answer-3.37% of
light is lost to reflection @ front surface
A patient with a distance PD of 68 mm wears a frame with
eye size 43 mm and a DBL of 17 mm. How much should
each lens be decentered in order to avoid induced prism?
- Answer-Decenter lenses OUT 4 mm
With proper blur, a patient reports that the 4 to 10 o'clock
line is clearest on the astigmatic dial. What is the axis of
the correcting cylinder? - Answer-120 degrees
Given the lens -2.00 +2.00 x 135, in which meridian is the
lens edge the thinnest? - Answer-45 degrees - plano
How much light is transmitted at the front surface of a lens
with n = 1.45 that is sitting in air? - Answer-96.6%
Costco Optical Department Exam (Latest Exam 2026)
|| Most Recent Exam Actual Complete Real Verified
Exam Questions And Correct Answers (Verified
Answers) Already Graded A+ | Guaranteed Success!!
Newest Exam!!!
A lensometer has a standard lens of +22.00D. The target
moves 20.7 mm toward the standard lens from the zero
position. What is the power of the lens? - Answer-+10.00D
A patient's spec rx is +8.00 -3.00 x 180 OD and +4.00 -
1.00 x 180 OS. How much prism is induced in each eye if
the patient looks 10 mm to the right of the lens centers? -
Answer-OD 8^BI
0S 4^BO
Total prism amount = 4^BI OD or 4^BO OS
Static retinoscopy is performed through a +1.50D lens.
The eye is neutralized in the 55 degree meridian at a
distance of 66..67cm, and neutralized in the other principal
meridian at a distance of 40cm. What is the patient's RE? -
Answer-Final rx = plano -1.00 x 055
,2|Page
A patient presents with keratometry readings of 43.00 @
180/45.00 @ 090 OD. How much astigmatism is expected
on retinoscopy OD, based on Javal's rule? - Answer--2.00
x 180 (WTR)
You are performing a stenopaic slit refraction. You
determine that the patient sees most clearly with the slit
positioned at 180 degrees. With the slit positioned at 90
degrees, a -2.25D spec lens provides the best acuity. With
the slit positioned at 180 degrees, a -0.75D spec lens
provides the best acuity. What is the patient's rx? -
Answer--0.75 -1.50 x 180
Consider a reduced eye model with an internal n = 1.333
and an axial length of 20.5 mm. What is the total eye
power to make the eye emmetropic? - Answer-+65.02D
A -2.00D uncorrected myope views an object at 25 cm.
How much does this patient need to accommodate in
order to see the object clearly? - Answer-2.00D
A patient can read 1M print at distance of 40cm. What is
the patient's equivalent Snellen VA? - Answer-20/50
, 3|Page
A plano convex lens with a radius of curvature of 1.5cm
and n = 1.523 is sitting in air. What is the power of the
curved surface? - Answer-+35.00D
How much light is lost to reflection at the front surface of a
lens with n = 1.45 that is sitting in air? - Answer-3.37% of
light is lost to reflection @ front surface
A patient with a distance PD of 68 mm wears a frame with
eye size 43 mm and a DBL of 17 mm. How much should
each lens be decentered in order to avoid induced prism?
- Answer-Decenter lenses OUT 4 mm
With proper blur, a patient reports that the 4 to 10 o'clock
line is clearest on the astigmatic dial. What is the axis of
the correcting cylinder? - Answer-120 degrees
Given the lens -2.00 +2.00 x 135, in which meridian is the
lens edge the thinnest? - Answer-45 degrees - plano
How much light is transmitted at the front surface of a lens
with n = 1.45 that is sitting in air? - Answer-96.6%
