Contact Lenses for the Color-Blind

  • Author: Lisa-Marie Rauschendorfer
  • Published: 20 May 2018
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Advanced Healthcare Materials/Wiley-VCH
thumbnail image: Contact Lenses for the Color-Blind

Color blindness is a disorder that affects about 8 % of males in Northern Europe. Normal color vision is trichromatic: Three different photoreceptive cones in the eye are involved and each one is activated by a specific wavelength. The combination of different activation thresholds for the cones is processed in the brain and the corresponding color is perceived.


In the color-blind, one or more of the cones are missing due to a genetic defect. Hence, it is not possible to differentiate specific colors. However, color distinction can be improved by filtering out specific wavelengths to minimize the overlap between the remaining cones.


Abdel-Rahman Badawy and colleagues from the University of Birmingham, UK, have developed color-filtering contact lenses by submerging "normal" lenses for 30 seconds in a commercially available dye (Atto 565). The compound belongs to the rhodamine dyes and absorbs wavelengths of 545 to 575 nm. The team optimized the concentration of the dye used in the process and investigated its toxicity. They found that the dye is neither cytotoxic to human corneal fibroblasts nor to human corneal epithelial cells and, therefore, might be used for an improvement of color distinction in color-blind persons.


 

Article Views: 723

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH