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6 Cards in this Set
- Front
- Back
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CORNEAL ALIGNMENT |
Base curve- .50mm flatter then k Diameter- 9.2 mm (Hvid - 2.3) Power- .50D more then spectacle rx (FAP) Peripheral Curves- 12.50nm Edge design- tel for all plus powers & low minus Position- slightly superior w/ upper lid attachment *upper edge at upper limbus *2mm corneal exposure inferiorly Movement- lens moves w/ upper lid * lens should exhibit little lateral movement on left/right eye excursion Fluorscein Pattern- faint even green under Poz Pooling inferiorly * bright green |
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APICAL CLEARANCE |
Base Curve- on k or slight steeper Diameter- 8.7mm or smaller Power- same as spectacle rx or slightly more minus (SAM) Peripheral Curves- 11.0mm Edge design- .08-.12mm. *lenticular in higher powers Position- on center *intrapalpebral fit Movement- 2-3mm Fluroscein Patterns- slight pooling centrally Slight bearing at mid-periphery * bright green under peripheral curves |
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Sag Depth is determined by |
Curvature Diameter |
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Most widely used material for rigid lens is FSA |
True |
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Intrapalpebral fit |
Apical clearance |
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Central pooling of fluroscein |
Apical clearance |
