NAO TEST 4 100 2026 FINAL PAPER SOLUTION
◉ Using the Dyer Nomogram as a guide, which of the following
would not represent a realistic K reading/ lens diameter
relationship?
43.25/44.25 8.6 diameter
48.25/ 49.25 7.7 diameter
40.00/ 41.00 9.2 diameter
40.00/ 41.00 8.2 diameter. Answer: 40.00/ 41.00 8.2 diameter
◉ Rx: -3.25 -0.75 x 180
K's: 43.50/ 44.25 @90
Which of the following set of lens parameters would most simulate a
RGP interpalpebral fitting?
43.00 -2.75 8.6 diameter
44.00 -3.75 8.6 diameter
44.00 -3.75 9.6 diameter
43.00 -2.75 9.6 diameter. Answer: 44.00 -3.75 8.6 diameter
◉ Which of the following is not generally used in the fitting of CLs?
Slit lamp
Lensometer
,Keratometer
Trial lens. Answer: Lensometer
◉ The first thing to do before using a keratometer is:
Focus the mires
Rotate the drum
Focus the eyepiece
Lock the instrument. Answer: Focus the eyepiece
◉ Rigid lenses may be inspected with which of the instruments
listed?
Lensometer
Radiuscope
Diameter gauge
All the above. Answer: All the above
◉ Dynamic fluorescein patterns can be observed:
Immediately after the patient blinks
When patient gazes straight ahead
When lens comes back to normal
None of the above.. Answer: Immediately after the patient blinks
,◉ The optical zone of a CL may be measured with:
Measuring magnifier
Radiuscope
Conversion table
None of the above. Answer: Measuring magnifier
◉ Which of hte following cannot be used as a lens inspection device?
Diameter gauge
Distometer
Lensometer
Radiuscope. Answer: Distometer
◉ CL diameter may be most accurately measured using a:
Millimeter ruler
Measuring magnifier
Radiuscope
Lensometer. Answer: Measuring magnifer
◉ A dynamic flourescein patter is best illuminated by:
Indirect light
Cobalt light
Penlight
, Fixation light. Answer: Cobalt light
◉ When a keratometer is used to help evaluate the fit of a soft CL,
distorted mires would most often indicate that the lens is:
Too flat
Too steep
Ideal fit
Slightly flat. Answer: Too steep
◉ A radiuscope is designed to:
1. Inspect surface quality 2. Measure radius of curvature
3. Measure lens power 4. Measure lens diameter
1 and 3
1 and 2
2 and 3
2 and 4. Answer: 1 and 2
◉ The quality of the surface of a rigid CL may be inspected utilizing:
1. Slit lamp 2. Lensometer
3. Measuring magnifier 4. Burton lamp
◉ Using the Dyer Nomogram as a guide, which of the following
would not represent a realistic K reading/ lens diameter
relationship?
43.25/44.25 8.6 diameter
48.25/ 49.25 7.7 diameter
40.00/ 41.00 9.2 diameter
40.00/ 41.00 8.2 diameter. Answer: 40.00/ 41.00 8.2 diameter
◉ Rx: -3.25 -0.75 x 180
K's: 43.50/ 44.25 @90
Which of the following set of lens parameters would most simulate a
RGP interpalpebral fitting?
43.00 -2.75 8.6 diameter
44.00 -3.75 8.6 diameter
44.00 -3.75 9.6 diameter
43.00 -2.75 9.6 diameter. Answer: 44.00 -3.75 8.6 diameter
◉ Which of the following is not generally used in the fitting of CLs?
Slit lamp
Lensometer
,Keratometer
Trial lens. Answer: Lensometer
◉ The first thing to do before using a keratometer is:
Focus the mires
Rotate the drum
Focus the eyepiece
Lock the instrument. Answer: Focus the eyepiece
◉ Rigid lenses may be inspected with which of the instruments
listed?
Lensometer
Radiuscope
Diameter gauge
All the above. Answer: All the above
◉ Dynamic fluorescein patterns can be observed:
Immediately after the patient blinks
When patient gazes straight ahead
When lens comes back to normal
None of the above.. Answer: Immediately after the patient blinks
,◉ The optical zone of a CL may be measured with:
Measuring magnifier
Radiuscope
Conversion table
None of the above. Answer: Measuring magnifier
◉ Which of hte following cannot be used as a lens inspection device?
Diameter gauge
Distometer
Lensometer
Radiuscope. Answer: Distometer
◉ CL diameter may be most accurately measured using a:
Millimeter ruler
Measuring magnifier
Radiuscope
Lensometer. Answer: Measuring magnifer
◉ A dynamic flourescein patter is best illuminated by:
Indirect light
Cobalt light
Penlight
, Fixation light. Answer: Cobalt light
◉ When a keratometer is used to help evaluate the fit of a soft CL,
distorted mires would most often indicate that the lens is:
Too flat
Too steep
Ideal fit
Slightly flat. Answer: Too steep
◉ A radiuscope is designed to:
1. Inspect surface quality 2. Measure radius of curvature
3. Measure lens power 4. Measure lens diameter
1 and 3
1 and 2
2 and 3
2 and 4. Answer: 1 and 2
◉ The quality of the surface of a rigid CL may be inspected utilizing:
1. Slit lamp 2. Lensometer
3. Measuring magnifier 4. Burton lamp
