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
System and method for handling image data transfer in a display driver
Digital stereo imaging photosensitive device for a grating and a photosensitive material and its method
Communication security
Method and apparatus for isolating label-switched path impairments
Apparatus and method for allocating devices to a communication route
Nonvolatile memory device and reading method thereof
Secondary drive device of a mobile working appliance
  Randomly Featured Patents
Method of preventing generation of earth circulating current in induction heating apparatus for molten steel
Process for deashing primary coal liquids
Computer system and power saving method thereof
Insect trap
Label film for deep drawing methods
Anodic bonding method, anodic bonding jig and anodic bonding apparatus
Color correcting method and printing apparatus in color printer
Beverage capsule holder
Stretch-wrap film dispenser
Patient monitor