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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Transitions |
A brand name for lenses that turn dark when exposed to ultraviolet rays |
A brand name for lenses that turn dark when exposed to ultraviolet raysphoto Chr |
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Photo Chromatic |
The ability to change color when exposed to ultraviolet rays. |
The ability to change color when exposed to ultraviolet rays. |
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PGX |
A glass lens that can change color , PGX |
A glass lens that can change color , PGX |
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PBX |
A glass lens that can change color, PBX |
A glass lens that can change color, PBX |
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Silver Halide Crystals |
The glass ingredient that makes the lenses turn dark |
The glass ingredient that makes the lenses turn dark |
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Polarized lenses |
Thin laminated process to block light in one meridian and allow light through in the meridian 90 degrees away |
Thin laminated process to block light in one meridian and allow light through in the meridian 90 degrees away |
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Presbyopia |
The crystalline lens loses its elasticity and a bifocal must be used to aid vision for near tasks |
The crystalline lens loses its elasticity and a bifocal must be used to aid vision for near tasks |
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G- 15 |
Dark green colored lens made popular by the military |
Dark green colored lens made popular by the military |
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Anti- Reflective Coating |
Coating to reduce reflections and increase transmission |
Coating to reduce reflections and increase transmission |
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Drop Ball Test |
Impact test for treated glass lenses |
Impact test for treated glass lenses |
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Lens Caliper |
Tools used to measure the thickness of a lens |
Tools used to measure the thickness of a lens |
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Heat Treating |
Tempering process for glass lenses using heat to render them impact resistant |
Tempering process for glass lenses using heat to render them impact resistant |
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Chemical Tempering |
Temping process for glass lenses to render them impact resistant |
Temping process for glass lenses to render them impact resistant |
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Colmascope |
Tool used to check if a glass lens has been safety tempered or is under stress. |
Tool used to check if a glass lens has been safety tempered or is under stress. |
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Polariscope |
SAME A COLMASCOPE Tool used to check if a glass lens has been safety tempered or is under stress. |
SAME A COLMASCOPE Tool used to check if a glass lens has been safety tempered or is under stress. |
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Gradient Lens Tint |
Gradual change of darkening of the same color of tint on one lens |
Gradual change of darkening of the same color of tint on one lens |
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Double Gradient Tint |
Gradual change from one color to another on the same lens |
Gradual change from one color to another on the same lens |
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Neutralizer |
Hot liquid to take out the tint color of a lens |
Hot liquid to take out the tint color of a lens |
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U.V. unit |
Hot U.V. Liquid absorbed into the lens material |
Hot U.V. Liquid absorbed into the lens material |
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Tinting Unit |
Hot color tints absorbed into the lens material |
Hot color tints absorbed into the lens material |
