Close
Close
A Story of Achromatopsia
276 views
3.125
3.1 from 8 votes

Achromatopsia (ACHM, also known as total color blindness), is a medical syndrome that exhibits symptoms relating to at least five conditions. The term may refer to acquired conditions such as cerebral achromatopsia, also known as color agnosia, but it typically refers to an autosomal recessive congenital color vision condition, the inability to perceive color and to achieve satisfactory visual acuity at high light levels (typically exterior daylight). The syndrome is also present in an incomplete form which is more properly defined as dyschromatopsia. It is estimated to affect 1 in 40,000 live births worldwide.

There is some discussion as to whether achromats can see color or not. As illustrated in The Island of the Colorblind by Oliver Sacks, some achromats cannot see color, only black, white, and shades of grey. With five different genes currently known to cause similar symptoms, it may be that some do see marginal levels of color differentiation due to different gene characteristics. With such small sample sizes and low response rates, it is difficult to accurately diagnose the 'typical achromatic conditions'. If the light level during testing is optimized for them, they may achieve corrected visual acuity of 20/100 to 20/150 at lower light levels, regardless of the absence of color. One common trait is hemeralopia or blindness in full sun. In patients with achromatopsia, the cone system and fibres carrying color information remain intact. This indicates that the mechanism used to construct colors is defective.

http://www.checkorphan.org/diseases/achromatopsia

Learn more about:

Clinical Trials

by Abidemi Uruejoma
14 views 1 week ago
by Abidemi Uruejoma
33 views 2 weeks ago
by Abidemi Uruejoma
49 views 3 weeks ago
by Abidemi Uruejoma
48 views 1 month ago
by Abidemi Uruejoma
51 views 1 month ago
by Abidemi Uruejoma
61 views 1 month ago
by Abidemi Uruejoma
60 views 1 month ago
by Abidemi Uruejoma
95 views 1 month ago
by Abidemi Uruejoma
110 views 2 months ago
3.125
3.1 from 8 votes
Free Newsletter
Find a Clinical Trial
Related Videos
by Abidemi Uruejoma
416 views
News Articles