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
Image forming apparatus acquiring image processing time detected when the acquired time is longer that the previously set time and to correct output image density using generated patch pattern
Electronic devices with voice command and contextual data processing capabilities
Audio processing in a multi-participant conference
Catecholic butanes and use thereof for cancer therapy
Device to facilitate moving an electrical cable of an electric vehicle charging station and method of providing the same
Online data conversion technique using a sliding window
System and method for solving connection violations
  Randomly Featured Patents
Current-voltage conversion circuit
Expandable fiberglass pressure vessel having internal pipe connection
Diesel exhaust filters
Heated baffle anaerobic lagoon digester
Method for conditioning phonograph records
Semiconductor device having an improved multilayer wiring system
Method of purifying and depositing group IIIa and group Va compounds to produce epitaxial films
Mechanisms for translating between two different voice-over-IP protocols
Method of lap sealing a molten cheese product with non-wax film
Unmanned robot vehicle with mobility enhancing arm