Vertometer - Study guides, Class notes & Summaries

ABO -American Board of Opticianry Practical Exam Questions and Answers Cancelling effect- subtract prism amounts{Answer: - BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00{Answer: - Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as{Answer: - Lensmeter, focimeter, vertometer To focus eyepiece{Answer: - 1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) ...

the ability of the eye to focus objects at varying distances is called - accommodation the Geneva Lens Measure is calibrated for a refractive index of - 1.530 A lens made from 2 convex surfaces - has against motion A lens reads +4.25D in the vertometer. If the ocular curve is -4.00D, what is the front base curve? - +8.25D Which of these front base curves would be suitable for a -300D meniscus lens? - +4.50 A tinted lens will absorb visible light, infrared and ultra violet becasue of - appr...

the wavelength of the infrared waves in the electromagnetic spectrum are - ANSWER longer than visible red light waves the Geneva Lens Measure is calibrated for a refractive index of - ANSWER 1.530 A lens made from 2 convex surfaces - ANSWER has against motion A lens reads +4.25D in the vertometer. If the ocular curve is -4.00D, what is the front base curve? - ANSWER +8.25D Which of these front base curves would be suitable for a -300D meniscus lens? - ANSWER +4.50 A tinted lens wi...

ABO Practical Exam Questions and Answers 2024 Cancelling effect- subtract prism amounts -Answer-BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00 -Answer-Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as -Answer-Lensmeter, focimeter, vertometer To focus eyepiece -Answer-1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) remove paper and turn lensometer on 4) ...

ABO PRACTICAL EXAM ADVANCED QUESTIONS AND ANSWERS 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 ...

ABO PRACTICAL EXAM(VERRIFIED ) Cancelling effect- subtract prism amounts - CORRECT ANSWER-BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00 - CORRECT ANSWER-Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as - CORRECT ANSWER-Lensmeter, focimeter, vertometer To focus eyepiece - CORRECT ANSWER-1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) remove paper...

the wavelength of the infrared waves in the electromagnetic spectrum are - ANSWER longer than visible red light waves the Geneva Lens Measure is calibrated for a refractive index of - ANSWER 1.530 A lens made from 2 convex surfaces - ANSWER has against motion A lens reads +4.25D in the vertometer. If the ocular curve is -4.00D, what is the front base curve? - ANSWER +8.25D Which of these front base curves would be suitable for a -300D meniscus lens? - ANSWER +4.50 A tinted lens wi...

the wavelength of the infrared waves in the electromagnetic spectrum are - correct answer -longer than visible red light waves the Geneva Lens Measure is calibrated for a refractive index of - correct answer -1.530 A lens made from 2 convex surfaces - correct answer -has against motion A lens reads +4.25D in the vertometer. If the ocular curve is -4.00D, what is the front base curve? - correct answer -+8.25D Which of these front base curves would be suitable for a -300D meniscus lens...

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...

Cancelling effect- subtract prism amounts - Answer BU/BU BD/BD BI/BO Powers between 0.00 & +/- 3.00 - Answer Read in 1/8 diopters .12 .37 .62 .87 Lensometer is also referred to as - Answer Lensmeter, focimeter, vertometer To focus eyepiece - Answer 1) while turned off. Place white sheet of paper against lens stop. 2) turn focus ring all the way counter clockwise,and then back clockwise until sharp. 3) remove paper and turn lensometer on 4) move power d...