Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Rotational molding
Patent
1997-03-31
1998-12-08
Vargot, Mathieu D.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Rotational molding
8507, 264 26, 264 27, B29D 1100
Patent
active
058464573
ABSTRACT:
The invention relates to a light-absorbing contact lens and process for preparing same. A contact lens is tinted with colorants which provide desired spectral transmittance characteristics over the tinted portion of the lens. The contact lens provides transmittance of incident radiation having a wavelength from 500 to 700 nm which is variable and wavelength-dependent. The lens of this invention also preferably filters out ultraviolet and blue light (wavelengths from 200 to about 500 nm). Various transmittance patterns for wavelengths from 500 to 700 nm are obtainable by appropriate choice of colorant combinations; the transmittance curve in this region and the colorants to achieve the desired transmittance characteristics are chosen to fill particular needs of a wearer as for example limiting transmittance of visible light in high intensity light environments. Lenses according to the invention may provide unique benefits for use with particular applications such as sporting activities, recreational activities, or the like. Both hard and soft contact lenses are disclosed, and various examples of specialized lenses for particular applications are disclosed.
REFERENCES:
patent: 3382183 (1968-05-01), Donoian et al.
patent: 3586423 (1971-06-01), Zelter
patent: 3701590 (1972-10-01), Zelter
patent: 4252421 (1981-02-01), Foley, Jr.
patent: 4304895 (1981-12-01), Loshaek
patent: 4324461 (1982-04-01), Salvatori
patent: 4390676 (1983-06-01), Loshaek
patent: 4468229 (1984-08-01), Su
patent: 4528311 (1985-07-01), Beard et al.
patent: 4553975 (1985-11-01), Su
patent: 4620851 (1986-11-01), Ryder et al.
patent: 4698374 (1987-10-01), Gallas
patent: 4702574 (1987-10-01), Bawa
patent: 4719248 (1988-01-01), Bambury et al.
patent: 4733959 (1988-03-01), Claussen et al.
patent: 4753654 (1988-06-01), Posin et al.
patent: 4952046 (1990-08-01), Stephens et al.
patent: 4998817 (1991-03-01), Zeltzer
patent: 5080688 (1992-01-01), Cohen
patent: 5141301 (1992-08-01), Morstad
patent: 5187207 (1993-02-01), Gailas
patent: 5235358 (1993-08-01), Mutzhas et al.
patent: 5252628 (1993-10-01), Chirila et al.
patent: 5617154 (1997-04-01), Hoffman
LandOfFree
Light filtering contact lens method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light filtering contact lens method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light filtering contact lens method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-173995