Abbe value - Study guides, Class notes & Summaries

ABO Practice Test Questions and Answers Already Passed Corpuscular the theory which explains light as a stream of invisible bundles of energy Photons the visible bundles of energy Electromagnetic Theory The theory which explains light as moving in a series of wave pulsations. 186,000 miles per second the speed of light in air ray a point of light pulsating in a straight line all colors the colors that visible or white light are composed of base a prism will bend light towards its one me...

Abbe Value - A numerical expression of how prone a lens material is to causing chromatic aberration. The higher the Abbe Value the lower the chance it will cause aberration Aberration - An unclear image of an object when viewed through a lens. ABO - American Board of Opticianary an agency that provides various levels certification for persons in the field. It is only a written exam not a practical. Accommodation - The ability for the eye's crystalline lens to change shape a...

Abo study Abbe Value - A numerical expression of how prone a lens material is to causing chromatic aberration. The higher the Abbe Value the lower the chance it will cause aberration Aberration - An unclear image of an object when viewed through a lens. ABO - American Board of Opticianary an agency that provides various levels certification for persons in the field. It is only a written exam not a practical. Accommodation - The ability for the eye's crystalline lens to change shape ...

Opticians Glossary of Terms Questions and Answers "A" measurement The horizontal dimension of the boxing system rectangle that encloses a lens or lens opening. Abbe value The most commonly used number for identifying the amount of chromatic aberration for a given lens material. The higher the Abbe value, the less chromatic aberration present in the lens. Abbe value is the reciprocal of dispersive power and is symbolized by the Greek letter nu, or v. Synonyms: nu value, constringence....

What controls the amt of light entering the eye - Iris Meniscus, equiconcave and flat concave are types of: - Minus lenses What is the term used to describe the eye's tendency to turn from its normal position? - Phoria What kind of lens has one convex and one concave surface? - Meniscus What material has the most favorable optical properties? - Crown glass What is the best lens treatment to reduce water and road surface glare? - Polarized The hard resin mater...

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 ocular curve...

ABO practice exam ophlthalmic optics, Exam Questions And Correct Answers. . Columbia Resin-39. . Lenses that commonly referred to as plastic are made of a material called ___________ a. Zylonite. b. Columbia Resin-39. c. Hivex. d. Polycarbonate. Runs perpendicular to The "normal" is an imaginary line that ________________ the lens surface. a. Refracts through b. Runs parallel to c. Runs perpendicular to d. Reflects off of .Simple hyperopic astigmatism . +3.00 -3.00 x 180 is an indicati...

Optician Training Mid Term Which one of these duties is not part of the optician's job - Diagnose and treat minor eye infections Which is not a core skill needed to be an optician? - Binocular vision Which of these items is not related to the NOCE certification exam? - Focuses on how to fit and assess contact lens issues How is the ABO-NCLE certification related to state optician licensing? - Some states still require both to work as an optician. What is a type of certification y...

The part of the lensometer which is capable of measuring the amount of prism is the: A. reticle B. axis wheel C. spotting device D. power drum - Answer- A. reticle Which of the following is a lensometer not capable of measuring? A. sphere power B. cylinder power C. base curve D. position of optical center - Answer- C. base curve You have been asked to neutralize a lens. After placing it in the lensometer, you observe that the three closely space parallel lines come into shar...

Optician Exam Review Questions and Answers If the center dot you have placed upon the uncut lens while spotting it does not lie directly upon the optical center of the lens: a) The lens is a progressive. b) The lens is a bifocal. c) There is prism in the lens. d) There is a lack of prism in the lens. e) You have spotted the lens wrong. c) There is prism in the lens. Which relationship would illustrate compound hyperopic astigmatism? a) - = + and + = - b) + = - and + = + ...