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20 Cards in this Set
- Front
- Back
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X axis |
Horizontal or 180 degree meridian |
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Optical Generator |
Machine used to surface back of ophthalmic lenses |
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Prism |
Triangular shaped piece of glass or plastic that changes the light. |
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Base down |
Vertical placement of prism in a downward position. |
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Base in |
Horizontal placement of prism towards the nose. |
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Base out |
Horizontal placement of prism toward the temple. |
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Base up |
Vertical placement of prism in upward position. |
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Bicentric grinding |
Surfacing part of a lens, creating 2nd optical center, correcting vertical imbalance. Aka slab off. |
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Binocular vision grade 1 |
Vision where there is repeatable perception. |
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Binocular vision grade 2 |
Vision where there is repeatable perception and fusion |
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Binocular vision grade 3 |
High quality vision where there is repeatable perception, fusion and stereopsis. |
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Strabismus |
Condition where one eye is looking in at one direction and the other in a another direction. |
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Decentration |
Optical center that is away from eye causing prism effect |
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Fusion |
Binocular process where each eye attempts to focus at the same object. |
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Prentice rule |
Used to determine unwanted prism. |
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Prism diopter |
Unit of measurement indicating different power. |
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Y Axis |
90 degree or vertical meridian |
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Stereopsis |
Three dementionsal vision only when binocular and fusion are present. |
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True image |
Retinal image focusing eye in strambismus |
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False image |
Retinal image devirting eye in strambismus |
