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Index 1.49 Abbe 59
Choose an answer
A condition of the eye in which light
focuses in front of the retina. Caused
1 2 Cr39 Index and abbe
by either the eye being too strong or
the globe of the eye being too long
Where is the concentric circles in a
3 4 Crown glass index and abbe
lensometer ?
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Terms in this set (96)
A condition of the eye in which light Myopia
focuses in front of the retina. Caused
by either the eye being too strong or
the globe of the eye being too long
, Difficulty accommodating* due to the Presbyopia
crystalline lens becoming less elastic.
Around what wavelenght of light is 460 nm
thought to cause cataracts
Axis pliers are meant to do what Turn and rotate a lens
Cr39 Index and abbe Index 1.49 Abbe 59
Crown glass index and abbe Index 1.523 Abbe 60
Trivex Index and abbe Index 1.54 Abbe 43-45
Polycarbanate index and abbe Index 1.58 Abbe 30
Hight index 1.60- 1.67 index and abbe 1.6 abbe 36, 1.67 abbe 32
Ultra high index 1.70- 1.7.4 index and 1.7 abbe 36, 1.74 abbe 33
abbe
If somone chose a pair of lenses to ASTM
put in a frame for primary sports use
what orginazation would have
checked the safety of the lenses
What indication on a frame or glass ANSI Z87.1
indicates a pair of saftey glasses
how thick does a lens from a pair of 3 mm thick or on a perscription higher than +3 at its
safety glasses have to be thinest part needs to be 2 mm
Where is the concentric circles in a Within the recticle
lensometer ?
What is a distometer used for? Measuring vertex distance between the front of the
eye and the back of the lens