Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Light filtering contact lens method










Image Number 2 for United States Patent #5846457.

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.








 
 
  Recently Added Patents
Method and apparatus for soft information transfer between constituent processor circuits in a soft-value processing apparatus
Method and structure for image local contrast enhancement
Key management policies for cryptographic keys
Method and apparatus for controlled reoxygenation
Methods of isolating bipotent hepatic progenitor cells
Spreading technique applied to broadband mobile communications by satelite relying on DVB-RCS
Method and system for billing based on color component histograms
  Randomly Featured Patents
Arthroplasty sizing gauge
Process for preparing novel moisture-curable hot-melt adhesive compositions
Illuminating magnifying lens capable of focusing its light on objects
Concrete armor unit to protect coastal and hydraulic structures and shorelines
System and method for providing haptic feedback to a musical instrument
Circuit and method for disabling a bitline load
Subsurface safety valve
Process for the recovery of recombinantly produced chymosin from insoluble aggregate
Nucleotide sequences encoding maize RAD51
LCD monitor bezel