Highlights of Topics / Course Structure (no Quizzes !!!) Personal Intro – Dick Whitney Index of Refraction, Abbe Values Surface Curvature, Lens Power (Back Vertex Power) The RX (prescription) : minus vs. plus cyl notations, axis angle, etc. Lensometer / Humphrey Focimeter Ophthalmic lens Styles Aspheric optics and off-axis performance Measuring Add Power Standards and their practical applications AO Lens Design Background Molding stress (Oracle) and its effect on final product
Light
Index of Refraction
Material Index (Nd) Hard Resin 1.499 Transitions 1.501 1.5 Glass White 1.523 1.5 Glass PGX/PBX High Index "55" 1.537 Polycarbonate 1.586 High Index "16" 1.600 1.6 Glass White 1.601 1.6 Glass PGX/PBX 1.7 Glass White** 1.701 1.8 Glass White** 1.8??
AO “V –block” refractometer
Material Index Abbe (Nd) Hard Resin 1.499 58 Transitions 1.501 56 1.5 Glass White 1.523 1.5 Glass PGX/PBX 57 High Index "55" 1.537 47 Polycarbonate 1.586 30 High Index "16" 1.600 42 1.6 Glass White 1.601 41 1.6 Glass PGX/PBX 1.7 Glass White** 1.701 40 1.8 Glass White** 1.8??
Toric lenses
Understanding Curves Diopters 153
AO Master 1.53 Curve Set
Glass Exec Lens Mfg (1952-2005) Same as startup in the 1950’s
AO’s Progressive lenses Dr. John Winthrop’s achievements in Proressive Lens design are world renound Lens Date Introduced Truvision® 1981 Truvision OMNI® 1988 Truvision Technica® 1990 AO Pro® 15 1992 AO Pro® 16 1994 AO Force® 55 1996 AO Compact® 1998 AO b' Active™ 2000 AO Pro Easy™ 2002
The RX (prescription)
AO Lensometer - 1919
AO Lensometer Collection
The AO Lensometer
Add Power Measurement
BSI and DIN std Add Power
AO & Ophthalmic Optics Courtesy of the Southbridge historical Society
Dr. Glancy PAL – 1920 (AO)
AO Ophthalmic Lens “Firsts” Tillyer Corrected Curve Series Minus Toric Series Implementation of Franklin Style Executive Bifocal Plastic Photochromic Lens Permalite Abrasion Resistant coating AO Compact Small Frame PAL