Click-on spectacles having bifocal lenses

Details Click-on spectacles having bifocal lenses Click-on spectacles having bifocal lenses

1997-01-15

1999-03-09

Mai, Huy

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With auxiliary lenses movable in and out of the optical path

351 47, 351 59, G02B 708, G02B 902

Patent

active

058808051

ABSTRACT:
The invention relates to a click-up clip-on spectacles comprising a means for clipping the clip-on spectacles to a spectacle frame and bifocal lenses mounted in the clip-on spectacles. The bifocal lenses consist of two parts mounted one above the other and over the entire width of the spectacle glass, the upper part has a dioptre value of 0 and the lower part has a dioptre value of 1 or more. The upper part of each bifocal spectacle lens has a height of about two thirds of the overall height of the lens and the lower part of each bifocal spectacle lens has a height of roughly one third of the overall height of the spectacle lens. The bifocal lenses may be white or coloured.

REFERENCES:
patent: 3575497 (1971-04-01), Leblanc
patent: 3957867 (1976-05-01), Morgan
patent: 5017001 (1991-05-01), Kooketsu
patent: 5428407 (1995-06-01), Sheffield
patent: 5710613 (1998-01-01), Hughes

Affiliated with

Also associated with

Rating

Click-on spectacles having bifocal lenses does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Click-on spectacles having bifocal lenses, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Click-on spectacles having bifocal lenses will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1326469