Drop-Ball Impact Resistance of Ophthalmic Lenses--Comparison of Tint, Material, Treatment Process, and Drilling

Drop-Ball Impact Resistance of Ophthalmic Lenses--Comparison of Tint, Material, Treatment Process, and Drilling

Over 4,000 finished ophthalmic lenses were subjected to multiple drop-ball testing. Lenses varied in material, thickness, prescription, and tint. Lenses with drilled holes for rimless mounting generally were less impact-resistant. Hardened tinted-glass lenses and CR-39 lenses showed less impact effe...

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Bibliographische Detailangaben
Hauptverfasser: Provines,Wayne F, Miller,J W, Blevins,R H, Fischer,Joseph R , Jr, Tredici,Thomas J
Format: Report
Sprache:eng
Schlagworte:
Ceramics, Refractories and Glass
Drop ball tests
Impact tests
Lenses
Medical Facilities, Equipment and Supplies
Ophthalmic lenses
Optical lenses
PE62202F
Resistance
WUSAM77551903
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Beschreibung
Zusammenfassung:Over 4,000 finished ophthalmic lenses were subjected to multiple drop-ball testing. Lenses varied in material, thickness, prescription, and tint. Lenses with drilled holes for rimless mounting generally were less impact-resistant. Hardened tinted-glass lenses and CR-39 lenses showed less impact effects due to drilling than similar clear-glass lenses. The chemicals added to glass for tinting apparently increased impact-resistance properties. (Author)