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 methods for correcting presbyopia and lenses for such correction in which production of a full range of multifocal lenses is accomplished using three rotationally symmetric, aspheric back surfaces, the design of which base curves is a function of refractive power.
摘要:
An improved single lens comprising: a continuous change in lens curvature going downwards; a front and a back surfaces; an upper part which front and back surfaces are top zones of front and back surfaces, covering at least the half of respectively front and back surfaces, and where the two top zones are aligned to each other such that the effective power of the upper part of the lens is constant; a lower part used for viewing near objects which front and back surfaces are lower zones of front and back surfaces, the front and back lower zones comprising each a surface zone where top to bottom increasing curvature of each surface zone is provided and where the two front and back lower zones are aligned to each other such that the maximum difference of the effective power of the lower part of the lens and the effective power of the upper part of the lens is comprised between 0 and 0.5 Diopter.
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 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:
A family of ophthalmic lenses for correcting presbyopia meets constraints for distance vision, near vision, and disparity and may be designed according to a process that incorporates a merit function accounting for binocular visual performance.
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 designing contact lenses that provides improved efficiency in lens design compared to conventional methods. It is a discovery of the invention that improved performance and reduced design time can be obtained by utilizing a visual performance prediction model as a part of the design process.
摘要:
A scanner configured to provide a two-dimensional scan of a radiation beam moving along the path, including two deflectors and a scan lens located downstream in the path of the beam from the deflectors and separated from the farthest deflector by air equivalent distance at least equal to the focal length of the scan lens.