Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1983-10-07
1986-10-21
Corbin, John K.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351160H, G02C 704, G02C 706
Patent
active
046182276
ABSTRACT:
A soft contact lens, particularly a multifocal or toric lens having prism ballast for lens orientation, is provided with a channel in the back surface of the lens circumscribing the optical zone of the lens to impart flexibility to the peripheral area of the lens and to provide for improved tear distribution. Optionally, the channel may be included in the front surface of the lens to impart flexibility to the peripheral area of the lens without affecting tear distribution. Advantages of the channel are particularly evident in flexibility of multifocal lenses which have significant vertical translation between the near and distance vision modes.
REFERENCES:
patent: 4324461 (1982-04-01), Salvatori
Advanced Contact Lens Fitting, vol. 1, No. 6, p. 15 (Oct. 1959).
"The Ultracon Prism Bifocal", The Optician 140 (3636), pp. 549-551 (Dec. 19, 1960).
"Corneal and Sclera Contact Lenses", Proceedings of the International Congress, pp. 210-212, (Mar. 20-24, 1966).
Hydrocurve* Product Bulletin, Soft Lens, Inc., (circa 1975).
"Contact Lens Practice: Basic and Advanced", Robert B. Mandell, Charles C. Thomas, Publisher, Springfield, Illinois, p. 244.
Corbin John K.
Eberhardt Wayne R.
Sugarman Scott J.
Vistakon, Inc.
LandOfFree
Soft contact lens does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Soft contact lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft contact lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1287082