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20 Cards in this Set
- Front
- Back
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Three point touch |
An imaginary triangle of fitting points on the two temples and bridge |
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Negative face form |
Bending the frame front so it contrasts the natural curve of the face |
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Low temple attachment |
The temple connects to the frame front in a low position to make the face look shorter |
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High temple attachment |
The temple connects to the frame front in a High position to make the face look longer |
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Standard frame alignment |
Basic alignment of a frame before adjusted for the patient. |
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Telegraph effect |
Upside down frames rock unevenly when placed on a flat surface |
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Bowing the temple |
Bending the temples so they wraps around the head in a Boeing out manner |
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Nose pads |
Pads to rest the weight of the frame on the sides of the nose |
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Guard srms |
Short metal piece where the nose pads connect and can be adjusted |
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Splay angle |
The angle of the pads in relation to the natural angle of the nose |
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Bevel |
A v shaped edge on the periphery of a spectacle lens to hold it in the eye wire |
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Safety bevel |
Smoothing of the sharp edge of the bevel so the patient does not get cut |
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Groover |
Equipment used to place a groove in the periphery of a lens to be held in place by a nylon cord |
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Focimeter |
Same as lensometer |
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Semi finished blank |
Lens with a finished front or base curve and an unfinished back curve |
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Finished lens blank |
Lens with front and back finished curves needing to be edged into a frame |
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Layout |
The process of preparing a lens for blocking and edging |
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Blocking |
Process of sticking a chuck or block to the front of the lens to be edged |
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Datum line |
An imaginary line horizontally through the frame that is half of the “B” |
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Pattern-less edger |
Able to cut a lens shape by tracing the frame eye wire |
