HOME >> BIOLOGY >> NEWS
Evidence for expanded color vision for some colorblind individuals

Some forms of colorblindness may actually afford enhanced perception of some colors, according to findings reported this week in Current Biology by John Mollon and colleagues at the University of Cambridge.

The most common form of colorblindness is an X-chromosome-linked variant form of color vision technically known as deuteranomaly. Colors are detected by humans through the combined action of three different types of so-called cone photoreceptors, each of which is optimally activated by different wavelengths of light. These sensitivities are altered in deuteranomalous colorblind individuals because they possess a variant form of one of the cone photoreceptors--the sensitivity of cones that should be "middle-wave" is shifted toward that of "long-wave" cones, resulting in decreased ability to differentiate between some colors that are easily distinguishable by those with normal color vision. In theory, however, it is possible that owing to the altered sensitivities of their cone photoreceptors, deuteranomalous individuals may be sensitive to color differences that are not apparent to those with normal color vision.

In the new work, researchers tested this idea by asking deuteranomalous and "color-normal" individuals to report whether they were able to distinguish between pairs of colors that were theoretically predicted to look different to deuteranomalous colorblind individuals but to appear the same to those with normal color vision. Indeed, the researchers found that some color pairs were only seen to be different by deuteranomalous individuals. The finding suggests that although these individuals may be blind to some colors accessible by color-normal individuals, they also have a sensitivity to a "color dimension" that is inaccessible to those with normal color vision. In their paper, the researchers remark that "[f]or a color-normal experimenter, it was striking to watch a deuteranamolous subject giving large difference ratings to apparently id
'"/>

Contact: Heidi Hardman
hhardman@cell.com
617-397-2879
Cell Press
5-Dec-2005


Page: 1 2

Related biology news :

1. A private bandwidth for communication in bats: Evidence from insular horseshoe bats
2. Evidence of rapid evolution is found at the tips of chromosomes
3. Evidence human activities have shaped large-scale ecological patterns
4. National Academies advisory: April 25 Symposium on Forensic Evidence
5. Evidence of 600-million-year old fungi-algae symbiosis discovered in marine fossils
6. Evidence of waterfowl mediated gene-flow in aquatic invertebrates
7. Evidence that human brain evolution was a special event
8. Evidence that learning is consolidated during sleep
9. Cell debuts design changes and expanded scientific coverage
10. Interaction of just 2 genes governs coloration patterns in mice
11. Phase II study of therapeutic vaccine shows efficacy in patients with metastatic colorectal cancer

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:8/5/2020)... ... , ... Regenative Labs has received approval from the Centers for Medicare & ... first Wharton’s jelly allografts to be assigned a Q code and be approved for ... Wharton’s jelly allograft product to be recognized as a 361 HCT/P by CMS regulated ...
(Date:7/18/2020)... ... July 16, 2020 , ... A study has been published ... Neoasis™ active noise control device to attenuate typical noises in a simulated neonatal ... the alarm sounds from patient monitors, ventilators and other bedside devices that would ...
(Date:7/2/2020)... ... July 01, 2020 , ... AltruBio Inc. http://www.altrubio.com ... a biologic for the treatment of steroid-refractory acute graft-versus-host disease (SR-aGVHD), at European ... J Martin of the Fred Hutchinson Cancer Research Center, this single-arm, open-label Phase ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... FARMS, Mich. (PRWEB) , ... August 12, 2020 ... ... Consulting Group, Inc. (EMMA International), a global leader in FDA compliance consulting ... of the nation’s fastest-growing private companies. The list represents a unique look at ...
(Date:8/3/2020)... (PRWEB) , ... August 03, 2020 , ... ... collection, today announced Jim Corrigan, President and CEO has been named one of ... broad cross-section of industry sectors, PharmaVoice 100 honorees are selected based on how ...
(Date:7/31/2020)... ... July 29, 2020 , ... R3 Stem Cell International is ... $3950. With 50 million stem cells total, patients may choose which extremities they would ... for arthritic joints (BMC Musculoskelet Disord. 2016). At R3 International, umbilical cord tissue is ...
(Date:7/31/2020)... ... July 29, 2020 , ... ... transmitter systems that can be configured to drive Klystrons, TWTs, IOTs, and magnetrons. ... drive one or two switches in a push-pull configuration; yielding fast fall time ...
Breaking Biology Technology:
Cached News: