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
Fuel cell module
Inhibitors of bacterial tyrosine kinase and uses thereof
Liquid crystal display device
Methods of forming activated carbons
Cosmetic or pharmaceutical peptides containing uncoded amino acids and their use in the treatment and/or care of the skin, mucous membranes, or scalp
System and method for selecting a video encoding format based on feedback data
Disk drive to enable defect margining
  Randomly Featured Patents
Process and circuit for the setting of an electronic digital display
Off PRL wireless acquisition system
Annulus porting of horizontal tree
Voltage reference generator using big flash cell
Process for printing and dyeing
Phenolfree stabilization of polyolefins
Pinched hour glass container
Elevator controller
System and method for generating and authenticating a computer password
Rotary drum scanner