摘要:
Designing spectacle lens blanks for a dual-surface progressive addition lens (PAL) comprising determining a prescription range from a first set of first designs to produce a second set of first designs satisfying the prescription range, determining a common surface using the second set of first designs, and using the common surface to produce a set of second designs satisfying the prescription range.
摘要:
The invention provides a contact lens that corrects for the wearer's refractive prescription by taking into account both pupil size and the Stiles Crawford effect of the first order.
摘要:
The present invention provides multifocal lenses containing at least four zones of different refractive power. The zones are positioned such that the wearer is able to use the inferior-most portion of the lens to more clearly, as compared to conventional multifocal lenses, view objects at distances more than 45 cm from the eye.
摘要:
The invention provides a method for designing progressive surfaces and lenses produced using image blur to construct a merit function. The shape of a lens surface, or surfaces, is arbitrarily defined and optimized to minimize the image blur based merit function.
摘要:
The present invention provides single vision and multifocal lenses, as well as methods for their production, having a transverse chromatic aberration enabling provision of a lens the performance of which is equivalent to a refractive lens with a higher Abbe number.
摘要:
The invention provides methods for designing contact lenses and contact lenses designed according to the method, which lenses provide an improved method for presbyopia correction compared to conventional lenses and methods. It is a discovery of the invention that improved performance and reduced design time can be obtained by using lens pairs that act synergistically to provide the lens wearer with good binocularity and consistent performance in near, intermediate and distance vision.
摘要:
The invention provides methods for fitting multifocal contact lenses that are less time consuming and result in more successful fittings than conventional methods.
摘要:
The invention provides a method for designing a composite lens surface by using vector addition of the surface curvatures of two or more lens surfaces and then constructing a surface by numerical integration.
摘要:
The invention provides methods for designing contact lenses and contact lenses designed according to the method, which lenses provide an improved method for presbyopia correction compared to conventional lenses and methods. It is a discovery of the invention that improved performance and reduced design time can be obtained by using lens pairs that act synergistically to provide the lens wearer with good binocularity and consistent performance in near, intermediate and distance vision.
摘要:
Designing a progressive addition lens includes using scaled surface powers and/or cylinder powers of base curves to determine a set of power targets, and using these targets to determine a lens design.