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
Multi-mode 3-dimensional image display apparatus
Collating device, collating method, and program
Multilayer films having reduced curling
Nickel-cobalt-manganese multi-element lithium ion battery cathode material with dopants and its methods of preparation
Semiconductor device comprising a Fin and method for manufacturing the same
Release layer
Compositions and methods of vascular injury repair
  Randomly Featured Patents
Printed circuit board and a method of recognizing the position of surface mounted parts
Connector assembly
Microbial preparation of substances from aromatic metabolism/I
Methods for manufacturing a copolymer with a high yield by reacting a vinyl monomer and a macromonomer
Dental recording device, articulator and methods
Pneumatically operated switch
System and method of monitoring, predicting and optimizing production yields in a liquid crystal display (LCD) manufacturing process
Coffee maker
Flexible-shaft lamp
Method of and apparatus for bending glass sheets to relatively sharp angles