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Exam (elaborations)

ABO REVIEW EXAM QUESTIONS & ANSWERS

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  • ABO
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  • ABO

ABO REVIEW EXAM QUESTIONS & ANSWERS Sclera - ANSWER-Tough, white outer coat of the eyeball myopia - ANSWER-nearsightedness; the condition in which parallel rays of light are brought into focus in front of the retina, rather than on it reflection - ANSWER-light that bounces back refracti...

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  • June 6, 2023
  • 5
  • 2022/2023
  • Exam (elaborations)
  • Questions & answers
  • ABO
  • ABO
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ABO REVIEW EXAM QUESTIONS &
ANSWERS
Sclera - ANSWER-Tough, white outer coat of the eyeball



myopia - ANSWER-nearsightedness; the condition in which parallel rays of light are brought into focus in
front of the retina, rather than on it



reflection - ANSWER-light that bounces back



refraction - ANSWER-when the direction of light changes as it passes from one medium to
another(bending of light)



presbyopia - ANSWER-Age of 40

need reading glass crystalline lens diminishes



frame difference - ANSWER-the difference betweeen the horizontal and vertical measurement

Ex. 50-45= 5mm



MPD - ANSWER-mechanical PD in a finished pair of glasses

the distance between the optic center



measuring PD - ANSWER-should sit at 40 cm(16in) from patient



average PD for adults - ANSWER-50mm to 75mm



diplopia - ANSWER-double vision



plus lens - ANSWER-thick at the center

, magnify

converge

FL in front of lens



minus lens - ANSWER-think at the center

minify

diverge

FL behind of lens



astigmatism - ANSWER-football shape eye

two different powers



refractive index - ANSWER-N= speed of light in air/ speed of light in material



a lens has a front surface power of +2.00D and a back surface power of -8.25. the corrective power is.. -
ANSWER-+2.00 ( -8.25 = -6.25D



a -4.00D lens must be decentered ----- to induce 100^D - ANSWER-Prism=4 x ?/ 10

4 x 2.5/ 10 = 1.00^D



geometric center - ANSWER-point where A&B intersect



dioptric difference between the lenses for the prescribtion of OD +2.00D and OS +.50D would be.. -
ANSWER-+1.50 D



lens calipers - ANSWER-measures lens thickness



amplitude - ANSWER-height or depth of a wave

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