Abo optical - Study guides, Class notes & Summaries

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...

ABO OPTICAL EXAM 2024 WITH 100% ACCURATE SOLUTIONS Light falling on the front surface of a spectacle lens is: A) partially reflected, partially absorbed and the remainder refracted B) partially reflected and the remainder refracted C) partially absorbed and the remainder refracted D) totally refracted - correct answer A) partially reflected, partially absorbed and the remainder refracted Concave mirror: A) can focus parallel incident rays to form a real image B) can focus paralle...

ABO OPTICAL EXAM 100% Correct Questions and Answers (American Board of Opticianry) Light falling on the front surface of a spectacle lens is: A) partially reflected, partially absorbed and the remainder refracted B) partially reflected and the remainder refracted C) partially absorbed and the remainder refracted D) totally refracted [Correct Ans: - A) partially reflected, partially absorbed and the remainder refracted Concave mirror: A) can focus parallel incident rays to form a r...

What is the minimum safety thickness? A) 3.00mm B) 2.2mm C) 1.5mm D) 4.25mm - A) 3.00mm A lens reads +4.25 in the vertometer. If the ocular curve is -4.00 what is the front base curve? A) +0.25D B)+4.00D C)+6.25D D)+8.25D - D)+8.25 Anti reflective coating of a lens is based on the principle of: A) diffraction B) reflection C) interference D) reflection and interference - D) reflection and interference Concave mirror: A) can focus parallel incident rays to form a real image B) ca...

Light falling on the front surface of a spectacle lens is: A) partially reflected, partially absorbed and the remainder refracted B) partially reflected and the remainder refracted C) partially absorbed and the remainder refracted D) totally refracted - A) partially reflected, partially absorbed and the remainder refracted Concave mirror: A) can focus parallel incident rays to form a real image B) can focus parallel incident Rays to form a virtual image C) always produce inverted images ...

ABO OPTICAL EXAM accurate 100% Light falling on the front surface of a spectacle lens is: A) partially reflected, partially absorbed and the remainder refracted B) partially reflected and the remainder refracted C) partially absorbed and the remainder refracted D) totally refracted - ANSWER A) partially reflected, partially absorbed and the remainder refracted Concave mirror: A) can focus parallel incident rays to form a real image B) can focus parallel incident Rays to form a virt...

Light falling on the front surface of a spectacle lens is: A) partially reflected, partially absorbed and the remainder refracted B) partially reflected and the remainder refracted C) partially absorbed and the remainder refracted D) totally refracted - ANSWER A) partially reflected, partially absorbed and the remainder refracted Concave mirror: A) can focus parallel incident rays to form a real image B) can focus parallel incident Rays to form a virtual image C) always produce inver...

Light falling on the front surface of a spectacle lens is: A) partially reflected, partially absorbed and the remainder refracted B) partially reflected and the remainder refracted C) partially absorbed and the remainder refracted D) totally refracted - Answer A) partially reflected, partially absorbed and the remainder refracted Concave mirror: A) can focus parallel incident rays to form a real image B) can focus parallel incident Rays to form a virtual image C) always produce in...

ABO OPTICAL EXAM PRE Set Questions And Revised Correct Answers | Already Passed!! 1. Light falling on the front surface of a spectacle lens is: A) partially reflected, partially absorbed and the remainder refracted B) partially reflected and the remainder refracted C) partially absorbed and the remainder refracted D) totally refracted - ANSWER : A) partially reflected, partially absorbed and the remainder refracted 2. Concave mirror: A) can focus parallel incident rays to form a...

ABO numbers, math, formulas Prentice's Rule - ANSWER-P = f x c P = amount of prism correction f = lens power (in diopters) c = decentration (the distance between the pupil centre and the lens's optical centre, in millimeters) Cornea IOR - ANSWER-1.37 Tear Film, Vitreous IOR - ANSWER-1.33 Crystalline lens IOR - ANSWER-1.42 Optical Standard index of refraction - ANSWER-1.53 Crown Glass index of refraction - ANSWER-1.523 High index IOR - ANSWER-1.74 CR-39 IOR - ANSWER-1...