The macula lutea is thought to act as a short wavelength filter, additional to that provided by the lens (Rodieck, 1973). As the fovea is the most essential part of the retina for human vision, protective mechanisms for avoiding bright light and especially ultraviolet irradiation damage are essential.
webvision.med.utah.edu/sretina.html webvision.med.utah.edu/sretina.html
Macula - (yellow spot) This part of the retina is the most sensitive. Its diameter is only 7 mm or about 1/4 inch. It is responsible for our central, or reading vision. This part of the retina gives us 20/20 vision.
www.99main.com/~charlief/Blindness.htm
Two of the circa 600 naturally occurring carotenoids, zeaxanthin and lutein, the major carotenoids of maize and melon respectively, are the constituents of the macula lutea, the yellow spot in the macula, the central part of the retina in primates and humans. ... The Medscape Journal ... Allergy & Clinical Immunology...
www.medscape.com/medline/abstract/1450592?src=emed_ckb_... www.medscape.com/medline/abstract/1450592?src=emed_ckb_ref_0
This is one reason why scientists are interested in retinal processing; the retina is an accessible part of the brain that can be easily stimulated with light...
www.cis.rit.edu/people/faculty/montag/vandplite/pages/c... www.cis.rit.edu/people/faculty/montag/vandplite/pages/chap_8/ch8p3.html
It has a very high concentration of special cells called cones which make it the only part of the retina capable of 20/20 vision. Any disease that affects the macula, such as macular degeneration, will result in a decrease in straight ahead central vision.
www.vrmny.com/pe/anatomy.html
The retina is a multi-layered sensory tissue that lines the back of the eye. It contains millions of photoreceptors that capture light rays and convert them into electrical impulses. These impulses travel along the optic nerve to the brain where they are turned into images.
www.stlukeseye.com/anatomy/Retina.asp www.stlukeseye.com/anatomy/Retina.asp
Retina - Wikipedia, the free encyclopedia
The vertebrate retina is a light sensitive tissue lining the inner surface of the eye. The optics of the eye create an image of the visual world on the retina, which serves much the same function as...
en.wikipedia.org/wiki/Retina
Probing further, the researchers found that the patient appeared to be using the treated part of her eye like a second fovea--the part of the retina that is most densely populated with photoreceptors and is typically used for detailed vision, such as reading.
www.technologyreview.com/biomedicine/23239/
Conditions and Diseases question: What part of the retina does not have photoreceptors? At the physiological blind spot, where the optic nerve crosses the retina. ... Answers.com > Wiki Answers > Categories > Health > Conditions and Diseases > What part of the retina does not have photoreceptors?
wiki.answers.com/Q/What_part_of_the_retina_does_not_hav... wiki.answers.com/Q/What_part_of_the_retina_does_not_have_photoreceptors
Part V: Vision Part 2 –The Retina ... The retina is a multi-layered sheet of neural tissue that is sensitive to light which makes up the inner lining of the back part of the eyeball. The retina sits on a pigmented membrane, known as the retinal pigmented epithelium (RPE), which absorbs any light that passes through...
www.arn.org/docs/glicksman/eyw_041101.htm