SOFT CONTACT LENS WITH NEW STABILIZING ZONES FOR HIGHER ANGULAR STABILITY AND COMFORT Russian patent published in 2024 - IPC G02C7/04 

Abstract RU 2826277 C2

FIELD: optics.

SUBSTANCE: invention relates to ophthalmic lenses. Claimed ophthalmic lens comprises: a first surface; a second surface located opposite the first surface, the second surface being adapted to abut on at least a portion of the eye of the user; and a stabilizing zone of the lens located adjacent to the first surface, wherein at least the profile of the stabilizing zone of the lens is configured to minimize the recovery time for orienting the ophthalmic lens to the rest position from the displaced position. Stabilizing area of the lens is located at least partially within the active area of the lens depending on the expected interaction with at least one eyelid of the user, and one or more eyelid profiles can be described in a Cartesian coordinate system by a second-order polynomial of the form: a0+a1.x+a2.x2, where a0 is an eye area not covered by an upper eyelid/an eye area not covered by a lower eyelid, that is distance between centre of pupil and edge of upper/lower eyelid at primary gaze position, a1 is the inclination of the eyelid at the location of the eye area not covered by the upper eyelid/the eye area not covered by the lower eyelid, a2 is the curvature at the same location, and x is the distance along the horizontal direction of the Cartesian coordinate system with its origin at the centre of the pupil.

EFFECT: disclosed is a soft contact lens with new stabilizing zones to increase angular stability and comfort.

2 cl, 12 dwg, 2 tbl

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RU 2 826 277 C2

Authors

Zherligan, Per-Iv

Zhyuben, Filipp F.

Richardson, Gari

Dates

2024-09-09Published

2020-05-13Filed