Fresnel Optics
Fresnel Optics Merton C. Flom Anthony J. Adams Fig. 1. Principle of a Fresnel lens. Refracting or bending power of the lens depends primarily on the relative angle between its…
OPHTHALMOLOGY
Spectacle Lens Tints and Coatings
Spectacle Lens Tints and Coatings Gregory L. Stephens Darryl J. Meister Tints and coatings used on spectacle lenses can make vision more comfortable, improve visibility and contrast, protect the eyes…
Spectacle Lens Design
Spectacle Lens Design Gregory L. Stephens Darryl J. Meister The results of a refraction specify the power of a lens only at its center, or along its optical axis. As…
Spectacle Lens Materials
Spectacle Lens Materials Gregory L. Stephens Darryl J. Meister Since the 1960s, the use of plastic as a spectacle lens material has increased dramatically. During this same time period, domestic…
Spectacle Lens Powers
Spectacle Lens Powers Gregory L. Stephens Darryl J. Meister1 The authors would like to acknowledge the contributions of the late John K. Davis to chapters 51 A-D. John was an…
The Human Eye as an Optical System
The Human Eye as an Optical System Milton Katz Philip B. Kruger Introduction The eye is a compound optical system composed of a cornea and a lens shown in Figure…
Geometrical Optics
Geometrical Optics Edmond H. Thall The discipline of geometrical optics deals with image formation by optical instruments. Physical optics (see elsewhere in these volumes) deals with the nature of light…
Aspheric Lenses
Aspheric Lenses David Volk A spherical refracting surface is of constant curvature, ie, it has a specific radius of curvature. Any ophthalmic refracting surface other than a spherical refracting surface…
Theory and Practice of Spectacle Correction of Aniseikonia
Theory and Practice of Spectacle Correction of Aniseikonia Eleanore Z. Thill Aniseikonia, a term coined by Dr Walter Lancaster in 1932, is an anomaly of binocular vision in which the…
