Dynamic multifocal spectacle frame

Details Dynamic multifocal spectacle frame Dynamic multifocal spectacle frame

2008-01-08

2008-01-08

Mai, Huy (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With auxiliary lenses movable in and out of the optical path

C351S041000, C351S059000

Reexamination Certificate

active

07316478

ABSTRACT:
This invention pertains to an attachment for bifocal eyeglasses which is a dynamic frame fitted with the lens for intermediate vision which will lie in front of the middle one third of the bifocal lens during computer use providing three zones of vision at a time without changing the head position or changing to a separate computer eye glass. This attachment along with the bifocal eye glass enables the optical centers of the distant vision and intermediate vision lens to overlap with each other falling on the visual axis, coinciding with the pupillary center of the eye at the primary head position overcoming strain, distortions and aberrations. This dynamic frame is locked at the side of the main frame with the help of press locks when ‘not in use’. This invention makes long hours of computer work comfortable and helps to overcome computer vision syndrome.

REFERENCES:
patent: 1206457 (1916-11-01), Mills
patent: 5598232 (1997-01-01), Pronesti
patent: 5923396 (1999-07-01), Ulvio
patent: 6264325 (2001-07-01), Peressini et al.

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