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What frame material is made of a mix of metals - CORRECT ANSWER-Monel
What is the depth of a 7x28 trifocal lens - CORRECT ANSWER-7mm
What is the first step to netrulize a frame in lensometer? - CORRECT ANSWER-Focus the eyepiece,
turn the eyepiece counter clockwise till blurry and clockwise till clear
What is a lens caliper used for? - CORRECT ANSWER-to measure the thickness of a lens
, A condition of the eye in which light focuses in front of the retina. Caused by either the eye being too
strong or the globe of the eye being too long - CORRECT ANSWER-Myopia
Difficulty accommodating* due to the crystalline lens becoming less elastic. - CORRECT ANSWER-
Presbyopia
Around what wavelenght of light is thought to cause cataracts - CORRECT ANSWER-460 nm
Axis pliers are meant to do what - CORRECT ANSWER-Turn and rotate a lens
Cr39 Index and abbe - CORRECT ANSWER-Index 1.49 Abbe 59
Crown glass index and abbe - CORRECT ANSWER-Index 1.523 Abbe 60
Trivex Index and abbe - CORRECT ANSWER-Index 1.54 Abbe 43-45
Polcarbanate index and abbe - CORRECT ANSWER-Index 1.58 Abbe 30
Hight index 1.60- 1.67 index and abbe - CORRECT ANSWER-1.6 abbe 36, 1.67 abbe 32
Ultra high index 1.70- 1.7.4 index and abbe - CORRECT ANSWER-1.7 abbe 36, 1.74 abbe 33
If somone chose a pair of lenses to put in a frame for primary sports use what orginazation would have
checked the safety of the lenses - CORRECT ANSWER-ASTM
What indication on a frame or glass indicates a pair of saftey glasses - CORRECT ANSWER-ANSI Z87.1