Bifocal lens - Study guides, Class notes & Summaries
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ABO Practical UPDATED Exam Questions and CORRECT Answers only
- Exam (elaborations) • 8 pages • 2024
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ABO Practical UPDATED Exam Questions 
and CORRECT Answers only 
Single Vision - Correct Answer- corrects for one distance 
Multifocal - Correct Answer- Corrects with two or more prescriptions (or 'powers') 
Bifocal - Correct Answer- lens having two focus strengths 
Trifocal - Correct Answer- pertaining to having three focus strengths 
Calculating Prismatic Effects - Correct Answer- obtained at the center of an optical lens by 
producing a difference in edge thickness, either by grinding the ba...
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Math for ABO test Latest Questions and Answers(American Board of Opticianry (ABO)
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Math for ABO test Latest Questions and Answers(American Board of Opticianry (ABO) 
A Box: 53 DBL: 15 ED: 55 PD: 30/32 
OD: 68/2 =34 OS: 68/2=34 
 
What is the MBS for the rt and left lens? {Answer: - OD: 68/2 =34 
OS: 68/2=34 
Decentration: Frame PD- PT PD 
OD: 34-30=4 decentered 
OS: 34-32= 2 decentered 
OD: MBS=ED+(2xDecenter)+2 
MBS=55+ 8 (2x4)+2=65mm 
OS: MBS=ED+(2x decenter)+2 
MBS=55+4 (2x2)+2=61mm 
OD-65mm blank 
OS: 61MM blank 
 
What is Prentice rule used for? {Answer: - To (Power x di...
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NCLE Practice Test Practical Questions and Answers
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Steep Fluorescein Pattern - Bright green pooling center, very faint green pooling 
on diameter of lens 
Flat Fluorescein Pattern - Bright green pooling on diameter of lens, very faint 
green in center 
Against-the-rule Astigmatism Pattern - Bright green pooling horizontally, faint 
green pooling vertically 
With-the-rule Astigmatism Pattern - Bright green pooling vertically, faint green 
pooling horizontally 
Prism Ballast - Common technique to stabilize lens from rotating. Added thickness ...
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ABO Practice Exams | 100 Questions with 100% Correct Answers | Verified | Latest Update 2024
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If the wearer complains of the bifocal line being somewhat in his way when driving, the problem may be 
alleviated by decreasing the distance between pads. 
True or False - False 
If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that: 
A. The frame is too small 
B. The bridge fit is tight 
C. Pressure is being applied by the temple shafts anterior to the ear. 
D. Pressure is being applied on the very tips of the temples. - Pressure is being app...
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NCLE Practice Test Practical Questions and Answers with Certified Solutions
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NCLE Practice Test Practical Questions and Answers with Certified Solutions Steep Fluorescein Pattern Bright green pooling center, very faint green pooling on diameter of lens 
Flat Fluorescein Pattern Bright green pooling on diameter of lens, very faint green in center 
Against-the-rule Astigmatism Pattern Bright green pooling horizontally, faint green pooling vertically 
With-the-rule Astigmatism Pattern Bright green pooling vertically, faint green pooling horizontally 
Prism Ballast Common te...
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ABO-NCLE practical Exam questions with correct answers
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Single Vision CORRECT ANSWER corrects for one distance 
 
Multifocal CORRECT ANSWER Corrects with two or more prescriptions (or 'powers') 
 
Bifocal CORRECT ANSWER lens having two focus strengths 
 
Trifocal CORRECT ANSWER pertaining to having three focus strengths 
 
Calculating Prismatic Effects CORRECT ANSWER obtained at the center of an optical lens by producing a difference in edge thickness, either by grinding the back surface at an angle to the front surface during lens surfacing or, if...
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ABO-NCLE Practical Exam 2023 Solved 100% Correct
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Single Vision - ANSWER-corrects for one distance 
 
Multifocal - ANSWER-Corrects with two or more prescriptions (or 'powers') 
 
Bifocal - ANSWER-lens having two focus strengths 
 
Trifocal - ANSWER-pertaining to having three focus strengths 
 
Calculating Prismatic Effects - ANSWER-obtained at the center of an optical lens by producing a difference in edge thickness, either by grinding the back surface at an angle to the front surface during lens surfacing or, if the lens has sufficient power...
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NCLE Practical Exam
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NCLE Practical Exam 
 
Which Curve is the Flattest? 
 
A) 7.5 mm	 
 
 
B) 44.75 D	 
C) 7.6 mm	 
D) 45.50 D - 7.6 mm 
 
Inflammation of the Eyelids is Called: 
 
A) Palpebritis	 
B) Keratitis	 	 
C) Conjunctivitis	 
D) Blepharitis - Blepharitis 
 
The Base Curve of a Rigid Lens was Ordered at 7.75 mm but Received at 7.85 mm. The Lens is _______ than ordered. 
 
A)	0.50 D Flatter 
B)	0.50 D Steeper 
C)	1.00 Flatter 
D)	1.00 Steeper - 0.50 D Flatter 
 
The Fairness To Contact...
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NCLE Practical Questions and Answers Verified A+
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NCLE Practical Questions and Answers Verified A+ 
 
Steep Fluorescein Pattern - Bright green pooling center, very faint green pooling on diameter of 
lens	 
 
Flat Fluorescein Pattern - Bright green pooling on diameter of lens, very faint green in center 
 
Against-the-rule Astigmatism Pattern - Bright green pooling horizontally, faint green pooling 
vertically	 
 
With-the-rule Astigmatism Pattern - Bright green pooling vertically, faint green pooling 
horizontally	 
 
Pri...
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ABO practice exams
- Exam (elaborations) • 16 pages • 2023
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If the wearer complains of the bifocal line being somewhat in his way when driving, the problem may be alleviated by decreasing the distance between pads. 
 
True or False - Answer- False 
 
If the wearer complains that the glasses feel snug but still slip down the nose, one likely cause is that: 
 
A. The frame is too small 
B. The bridge fit is tight 
C. Pressure is being applied by the temple shafts anterior to the ear. 
D. Pressure is being applied on the very tips of the temples. - Answer- ...
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