NCLE Exam Part Two with all Correct & 100% Verified
Answers |Actual Complete Update |Already Graded A+
The tear film consists of which the following? ✔Correct Answer-aqueous layer, lipid film, &
mucin film
The primary function of the mucin film is to: ✔Correct Answer-change the corneal epithelial
surface from a hydrophobic surface to a hydrophillic surface
The lipid layer functions primarily to: ✔Correct Answer-prevent evaporation of the tear film
The test which assesses the quantity of tears normally produced is: ✔Correct Answer-
Schirmer
The test which assess the quality of the tear film is: ✔Correct Answer-BUT
Prospective patients who fall within the following age group generally provide the best
prognosis for successful contact lens fitting: ✔Correct Answer-13 to 38
Which of the following would indicate a good prognosis for successful contact lens fitting?
✔Correct Answer-adequate manual dexterity, regular low astigmatism, &BUTS longer than 15
seconds
The base curve of a certain contact lens is equal to 7.5 mm radius of curvature. The equivalent
power in diopters is: ✔Correct Answer-42.00
The primary function of a keratometer is to: ✔Correct Answer-measure the curvature of the
cornea
When moved 5 mm from its original position the effective power of a 10.00 diopters lens will
change: ✔Correct Answer-0.50 D
When a spectacle lens prescription exceeds _______diopters, vertex distance must be
compensated for when determining the power of a contact lens. ✔Correct Answer-+4.00 D
A spectacle lens is prescribed at -10.00 diopters provided that the lens is fit at a vertex distance
of 10 mm. A rigid contact lens fit "on K" for this patient would require a power of: ✔Correct
Answer-- 9.00 D
Spectacle Rx = +10.00 D Vertex distance = 10 mm A rigid contact lens fit "on K" would require
the following power: ✔Correct Answer-+11.00 D
, Rx: -4.00 + 1.00 x 90 K: 42,50 at 180/ 43,50 at 90 A rigid contact lens fit "on K" would require the
following power: ✔Correct Answer--3.00 D
The power of the lacrimal lens in the previous question is: ✔Correct Answer-plano
Rx: +11.00 +1.00 x 20 Vertex distance = 12 mm Ks: 46.25/47.25 What would be the power of a
rigid contact lens fit "on K?" ✔Correct Answer-+14.00 D
The transition zone between the sclera and the cornea is called: ✔Correct Answer-limbal area
Moderate to high myopes often provide a good prognosis for contact lens wear. This may be
because: ✔Correct Answer-they are highly motivated peripheral vision is improved the image
size is larger
Rx: -3.00 - 0.50 x 90 Vertex distance = 11 mm What is the power of a rigid contact lens fit 0.50 D
steeper than the flattest corneal meridian? Assume all the astigmatism is in the cornea.
✔Correct Answer--3.50 D
Rx: -2.50 +0.25 x 90 Vertex distance = 12 mm If a contact lens is to be fit 0.75 diopters steeper
than the flattest corneal meridian, what would the power be? Assume all the astigmatism is in
the cornea. ✔Correct Answer--3.00 D
The thickness and power of the lacrimal lens will vary with the: ✔Correct Answer-lens-cornea
relationship
The precorneal tear film provides: ✔Correct Answer-a lubricant to the cornea a smooth
optical surface for the cornea nutrients to the cornea
The corneal curvature at the limbal area closely approximates the curvature of the: ✔Correct
Answer-sclera
The CPC of a trial contact lens is 44.00 diopters and contains a power equal to +14.87 D. The
over refraction is equal to -1.62 D. What final lens power is required if the CPC to be ordered is
43.62 diopter. ✔Correct Answer-+13.62 D
A-3.50 D lens with a base curve of 44.50 provides excellent visual acuity. If the CPC were
changed to 45.00 D what power would be needed? ✔Correct Answer--4.00 D
A "dry eye" condition can be evaluated through which of the following tests? ✔Correct
Answer-Schirmer test
A new contact lens wearer should become familiar with the: ✔Correct Answer-blinking
mechanism
Answers |Actual Complete Update |Already Graded A+
The tear film consists of which the following? ✔Correct Answer-aqueous layer, lipid film, &
mucin film
The primary function of the mucin film is to: ✔Correct Answer-change the corneal epithelial
surface from a hydrophobic surface to a hydrophillic surface
The lipid layer functions primarily to: ✔Correct Answer-prevent evaporation of the tear film
The test which assesses the quantity of tears normally produced is: ✔Correct Answer-
Schirmer
The test which assess the quality of the tear film is: ✔Correct Answer-BUT
Prospective patients who fall within the following age group generally provide the best
prognosis for successful contact lens fitting: ✔Correct Answer-13 to 38
Which of the following would indicate a good prognosis for successful contact lens fitting?
✔Correct Answer-adequate manual dexterity, regular low astigmatism, &BUTS longer than 15
seconds
The base curve of a certain contact lens is equal to 7.5 mm radius of curvature. The equivalent
power in diopters is: ✔Correct Answer-42.00
The primary function of a keratometer is to: ✔Correct Answer-measure the curvature of the
cornea
When moved 5 mm from its original position the effective power of a 10.00 diopters lens will
change: ✔Correct Answer-0.50 D
When a spectacle lens prescription exceeds _______diopters, vertex distance must be
compensated for when determining the power of a contact lens. ✔Correct Answer-+4.00 D
A spectacle lens is prescribed at -10.00 diopters provided that the lens is fit at a vertex distance
of 10 mm. A rigid contact lens fit "on K" for this patient would require a power of: ✔Correct
Answer-- 9.00 D
Spectacle Rx = +10.00 D Vertex distance = 10 mm A rigid contact lens fit "on K" would require
the following power: ✔Correct Answer-+11.00 D
, Rx: -4.00 + 1.00 x 90 K: 42,50 at 180/ 43,50 at 90 A rigid contact lens fit "on K" would require the
following power: ✔Correct Answer--3.00 D
The power of the lacrimal lens in the previous question is: ✔Correct Answer-plano
Rx: +11.00 +1.00 x 20 Vertex distance = 12 mm Ks: 46.25/47.25 What would be the power of a
rigid contact lens fit "on K?" ✔Correct Answer-+14.00 D
The transition zone between the sclera and the cornea is called: ✔Correct Answer-limbal area
Moderate to high myopes often provide a good prognosis for contact lens wear. This may be
because: ✔Correct Answer-they are highly motivated peripheral vision is improved the image
size is larger
Rx: -3.00 - 0.50 x 90 Vertex distance = 11 mm What is the power of a rigid contact lens fit 0.50 D
steeper than the flattest corneal meridian? Assume all the astigmatism is in the cornea.
✔Correct Answer--3.50 D
Rx: -2.50 +0.25 x 90 Vertex distance = 12 mm If a contact lens is to be fit 0.75 diopters steeper
than the flattest corneal meridian, what would the power be? Assume all the astigmatism is in
the cornea. ✔Correct Answer--3.00 D
The thickness and power of the lacrimal lens will vary with the: ✔Correct Answer-lens-cornea
relationship
The precorneal tear film provides: ✔Correct Answer-a lubricant to the cornea a smooth
optical surface for the cornea nutrients to the cornea
The corneal curvature at the limbal area closely approximates the curvature of the: ✔Correct
Answer-sclera
The CPC of a trial contact lens is 44.00 diopters and contains a power equal to +14.87 D. The
over refraction is equal to -1.62 D. What final lens power is required if the CPC to be ordered is
43.62 diopter. ✔Correct Answer-+13.62 D
A-3.50 D lens with a base curve of 44.50 provides excellent visual acuity. If the CPC were
changed to 45.00 D what power would be needed? ✔Correct Answer--4.00 D
A "dry eye" condition can be evaluated through which of the following tests? ✔Correct
Answer-Schirmer test
A new contact lens wearer should become familiar with the: ✔Correct Answer-blinking
mechanism
