(Phys.org) —Light striking the retina in the back of the eye is the first major step in the vision process. But when the photoreceptors in the retina degenerate, as occurs in macular degeneration, the retina no longer responds ...
Biologists at Johns Hopkins University grew human retinas from scratch to determine how cells that allow people to see in color are made.
Cell & Microbiology
Oct 11, 2018
1
455
An experiment originally designed to test the visual abilities of octopuses and cuttlefish has given University of Bristol researchers an unprecedented insight into the human ability to perceive polarized light - the super ...
Plants & Animals
Jun 30, 2015
1
920
Eye doctors soon could use computing power to help them see individual cells in the back of a patient's eye, thanks to imaging technology developed by engineers at the University of Illinois. Such detailed pictures of the ...
Optics & Photonics
Jun 23, 2015
0
2669
Scientists are interested in using gels to deliver drugs because they can be molded into specific shapes and designed to release their payload over a specified time period. However, current versions aren't always practical ...
Bio & Medicine
Feb 19, 2015
0
544
(Phys.org) —A team of engineers has designed a telescopic contact lens that can switch between normal and magnified vision by using slightly modified off-the-shelf 3D television glasses. The researchers, led by Joseph Ford, ...
Engineering
Jul 12, 2013
4
0
In a study to be released on March 1, 2009, Mount Sinai Hospital's Dr. Andras Nagy discovered a new method of creating stem cells that could lead to possible cures for devastating diseases including spinal cord injury, macular ...
Cell & Microbiology
Mar 1, 2009
10
0
A team of biochemists at the Manchester Institute of Biotechnology has developed an isothermal biocatalytic process that can be used to manufacture therapeutic oligonucleotides in large volumes. In their paper published in ...
Biologists at the University of Cincinnati discovered that underfed jumping spiders lose light-sensitive cells that are key to their vision.
Plants & Animals
Apr 20, 2023
0
53
Researchers at Tel Aviv University identified a new genetic risk factor for the complex eye disease AMD (Age-related Macular Degeneration), a leading cause for loss of eyesight at an advanced age. For the first time, the ...
Cell & Microbiology
Feb 7, 2023
0
5
Macular degeneration is a medical condition usually of older adults that results in a loss of vision in the center of the visual field (the macula) because of damage to the retina. It occurs in “dry” and “wet” forms. It is a major cause of blindness in the elderly (>50 years)[citation needed]. Macular degeneration can make it difficult or impossible to read or recognize faces, although enough peripheral vision remains to allow other activities of daily life.
The inner layer of the eye is the retina, which contains nerves that communicate sight, and behind the retina is the choroid, which contains the blood supply to the retina. In the dry (nonexudative) form, cellular debris called drusen accumulate between the retina and the choroid, and the retina can become detached. In the wet (exudative) form, which is more severe, blood vessels grow up from the choroid behind the retina, and the retina can also become detached. It can be treated with laser coagulation, and with medication that stops and sometimes reverses the growth of blood vessels.
Although some macular dystrophies affecting younger individuals are sometimes referred to as macular degeneration, the term generally refers to age-related macular degeneration (AMD or ARMD).
This text uses material from Wikipedia, licensed under CC BY-SA
