Method and apparatus for forming a translating multifocal contact lens

Abstract

A translating multifocal contact lens comprising multiple optic zones and a lower eyelid contact surface is described, along with method steps and apparatus for implementing them. The lens may optionally include a lower eyelid support structure. At least a portion of one surface of the translating multifocal lens may be free-form, including the lower eyelid contact surface and optional lower lid support structure capable of constraining the lens as the eye changes from one optical zone to another. The amount of translation across the surface of the eye.

Description

technical field [0001] This invention relates to contact lenses. More specifically, the present invention relates to a translating multifocal contact lens comprising multiple optic zones and one or both of a lower lid support structure and a lower lid contact structure, wherein when the eye is between the multiple optic zones The structure assists in limiting the movement of the lens over the eye during translation. Background technique [0002] Bifocal lenses include two or more zones or zones of differing light intensities, usually including a distance vision optic zone for distance vision and a near vision optic zone for near or very near vision. The two zones may be subdivided into additional vision zones, in which case the lens may be referred to as a multifocal lens. Previously known multifocal lenses have been limited by known production means such as cast molding, standard extrusion or iron-on techniques and injection molding techniques. [0003] The retinal image...

AI Technical Summary

Problems solved by technology

Another disadvantage of the prior art is the discomfort when worn on the eye

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