Plus lenses are - Study guides, Class notes & Summaries
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NCLE Practice Test 100% Solved
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NCLE Practice Test 100% Solved 
A Correct Statement regarding epithelial cells is that they: 
a)Comprise the posterior layer of the cornea 
b)Are unable to regenerate 
c)Comprise the thickest layer of the cornea 
d) Have the ability to reproduce - Answer-d) have the ability to reproduce 
Which of the following prescriptions indicates against-the-rule astigmatism? 
a)-4.50 +1.00 x75 
b)-4.50 +1.00 x 180 
c)-4.50 -1.00 x 165 
d)4.50 -1.00 x 180 - Answer-a)-4.50 +1.00 x75 
When a keratometer is bei...
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ABO Advance Exam Study Questions with Complete Solutions Top Graded 2024
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The amount of reflection of each surface of cr-39 lenses is approximately? 
A. 2% 
B. 4% 
C. 6% 
D. 8% - 4% 
 
The absorption of light in lenses is classified by two variables. What are they? 
A. Base curve and thickness 
B. Index of refraction and thickness 
C. Thickness and lens transmission 
D. Tint, and lens transmission - C. Thickness and len transmission 
 
The denser the tint in a lens____ 
A. The greater transmission of light through the lens 
B. The greater internal reflections in th...
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ABO Practice Test (Questions and Answers) 2024/2025
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ABO Practice Test (Questions and Answers) 2024/2025 
To mount a lens in a nylon suspension type frame, it would be necessary to _______ the lens. 
a) Drill 
b) Notch 
c) Groove 
d) V-Bevel - Answer ️️ -c) Groove 
The optical center of a lens is: 
a) At the geometrical center 
b) One the 180 line 
c) At the point where the "a" and "b" measurement meet 
d) A lens location of zero deviation of the optical axis - Answer ️️ -d) A lens location of zero 
deviation of the optical axis 
The p...
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ABO Practical(ABO Practical broken down based on the ABO-NCLE practical Exam Candidate HandbookPractical Test Specifications sheet)
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ABO Practical(ABO Practical broken down based on the ABO-NCLE practical Exam Candidate HandbookPractical Test Specifications sheet) 
Single Vision 
corrects for one distance 
 
 
Multifocal 
Corrects with two or more prescriptions (or 'powers') 
 
 
 
 
 
 
00:05 
01:09 
Bifocal 
lens having two focus strengths 
 
 
Trifocal 
pertaining to having three focus strengths 
 
 
Calculating Prismatic Effects 
obtained at the center of an optical lens by producing a difference in edge thickness, eith...
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NCLE Exam Prep Questions and Answers Latest Update (2024/2025) 100% Pass
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NCLE Exam Prep Questions and Answers 
Latest Update (2024/2025) 100% Pass 
optic zone - Answer ️️ -the central portion of a contact lens which contains the refractive power 
and generally corresponds to the central corneal cap 
posterior apecal radius - Answer ️️ -this term is generally used in reference to spin-cast soft 
lenses. the curvature of the posterior surface of the lens changes with the refractive power. the 
radius of curvature is measured at the apex of the posterior surface...
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ABO ADVANCED EXAM QUESTIONS AND ANSWERS 100% UPGRADED 2024
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Base Curve - Curvature of the front of the lens 
 
How is Cyl ground on a minus cyl lens? - Single curve on the front. Cyl ground on the back 
 
How is cyl ground on a plus cyl lens? - Flattest curve on the front. Old way of doing it do to cosmetics 
 
What is Vogels formula used for? - Creating best form and n standard surfacing 
 
Vogel's Formula (+ lenses) - Spherical equivalent + 6.00 
 
Vogel's Formula (- lenses) - Spherical equivalent + 6.00 / 2 
 
Corrected Curve Theory rules: - #1 ocul...
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ABO -American Board of Opticianry Practice Test With Correct Questions and Answers/Assured Pass 2024
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ABO -American Board of Opticianry Practice Test With Correct Questions and Answers/Assured Pass 2024 
When discussing thick lenses, the factors which are considered in computing the lens power are: 
 
a. front curve, thickness and index 
b. back curve, thickness and index 
c. front curve, back curve and thickness 
d. front curve, back curve, thickness and index 
(Ans: - d. front curve, back curve, thickness and index 
 
Toric transposition shows: 
	 
a. lens thickness 
b. power in principal mer...
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NCLE Practice Test
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NCLE Practice Test 
 
A Correct Statement regarding epithelial cells is that they: 
 
a)Comprise the posterior layer of the cornea 
b)Are unable to regenerate 
c)Comprise the thickest layer of the cornea 
d) Have the ability to reproduce - d) have the ability to reproduce 
 
Which of the following prescriptions indicates against-the-rule astigmatism? 
 
a)-4.50 +1.00 x75 
b)-4.50 +1.00 x 180 
c)-4.50 -1.00 x 165 
d)4.50 -1.00 x 180 - a)-4.50 +1.00 x75 
 
When a keratometer is being calibrated, w...
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NCLE Practice Test Exam | Questions & 100% Correct Answers (Verified) | Latest Update | Grade A+
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A Correct Statement regarding epithelial cells is that they: 
a)Comprise the posterior layer of the cornea 
b)Are unable to regenerate 
c)Comprise the thickest layer of the cornea 
d) Have the ability to reproduce 
: d) have the ability to reproduce 
Which of the following prescriptions indicates against-the-rule astigmatism? 
a)-4.50 +1.00 x75 
b)-4.50 +1.00 x 180 
c)-4.50 -1.00 x 165 
d)4.50 -1.00 x 180 
: a)-4.50 +1.00 x75 
2 | P a g e 
When a keratometer is being calibrated, which of the fo...
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ABO Practice Test Exam Questions And Answers (Updated And Verified)
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c. 5 mm from the top of the segment 
d. at the very bottom of the segment - answerb. in the geometric center of the segment 
The base curve of any multifocal lens is found on the surface containing the: 
a. cross curve 
b. cylinder surface 
c. segment 
d. ocular curve - answerc. segment 
Normal slab-off (bicentric grind) is ground on the lens whose vertical meridian has the: 
a. strongest curves 
b. most plus power 
c. least plus power 
d. least minus power - answerc. least plus power 
The refra...
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