What is Colorblindness?

What is colorblindness?

To see, our retinas contain both cone and rod photoreceptors. Rod photoreceptors help us detect light and dark whereas cone photoreceptors help us detect color. There are three types of cone photoreceptors, each of which helps us to see a different part of the color spectrum.

There are different ways to be color blind. One way is that you are missing a type of cone altogether, called dichromat. A second way is that even though you have all three cones, one of your cones doesn’t fully detect the wavelengths it should. This is called analamous trichromat.

Types of dichromats (missing a type of cone)

Protanope: cannot detect red well and therefore reds, oranges, yellows, and greens look similar. Also, reds appear dim.
Deuteranope: cannot detect green well. Reds, oranges, yellows, and greens look similar but unlike a protanope, reds do not seem dim.
Tritanope: cannot detect blue well. Blue and yellows appear similar

Types of anomalous trichromats (all three cones, but one is abnormal)

Protanomalous trichromat: The red cone doesn’t detect the correct wavelengths and therefore red, green and orange all appear similar. Imagine wearing green-tinted lenses and that is similar to how a protanomalous trichromat sees.
Deuteranomalous trichromat: The green cone doesn’t detect the correct wavelengths and therefore red, orange and green look similar. People with this condition view the world through a red tint.

If you enjoyed this article on Colorblindness, be sure to check our our article on Mila Kunis and Her Pretty Eyes.

A Little Bit About…

A Little Bit About…

Ashley Iketani-Castillo, OD, MS

Dr. Iketani is a Florida native who has a passion for managing ocular disease. She views each patient as a whole person and believes the eyes are a window to a patient’s systemic health. She also has a passion for fitting rigid lenses on patients with corneal disease to help them obtain their best vision.

Dr. Iketani graduated from the University of Alabama at Birmingham School of Optometry where she completed internships at the Hefner Veteren’s Affairs hospital in Charlotte, NC and The Metrolina Association for the Blind which focused on Low Vision rehabilitation. Prior to pursuing optometry, she obtained a Masters of Science which focused on developmental genetics and worked as a technician in a lab that researched breast cancer.

Dr. Iketani currently resides in Charlotte with her husband, a pediatric resident, their two cats and they are welcoming a baby boy in December 2018.

Disclaimer

Information contained within this Web site is intended solely for educational purposes and is neither intended nor implied to be a substitute for professional medical advice relative to your specific medical condition or question. Always seek the advice of your physician or other health care provider for any questions you may have regarding your medical condition. Only your physician can provide specific diagnoses and therapies. By using this Web site, you agree to this Medical Disclaimer.

SEE Logo contact lenses

 

205 E Council Street, Suite B
Salisbury, North Carolina 28144

Phone: (704) 310-5002
Fax: (704) 310-5003
kristin@salisburyeyecareandeyewear.com

 

 

205 E Council Street, Suite B
Salisbury, North Carolina 28144

Phone: (704) 310-5002
Fax: (704) 310-5003
kristin@salisburyeyecareandeyewear.com

 

Hours:
Monday: 8:30 AM – 5:00 PM
Tuesday: 10:00 AM – 7:00 PM
Wednesday: 8:30 AM – 5:00 PM
Thursday: 8:30 AM – 5:00 PM
Friday: 9:00 AM – 1:00 PM

Hours:
Monday: 8:30 AM – 5:00 PM
Tuesday: 10:00 AM – 7:00 PM
Wednesday: 8:30 AM – 5:00 PM
Thursday: 8:30 AM – 5:00 PM
Friday: 9:00 AM – 1:00 PM

FacebookInstagramTwitterPinterestYouTube

 

FacebookInstagramTwitterPinterestYouTube