Where did the information come from?
- http://expertspaceca.grolier.com/nonarticle?product_id=ngo&id=10005060&&level=1&uid=10557545
- http://www.tutorvista.com/biology/color-blindness
- Youtube videos (see 'Multimedia')
- http://www.colormatters.com/color-and-vision/what-is-color-blindness
- http://bodyandhealth.canada.com/condition_info_details.asp?disease_id=36
- http://www.colourblindawareness.org/