The vertebrate retina (/ËrÉtÉªnÉ/ RET-nuh, pl. retinae, /ËrÉtiniË/; from Latin rÄte, meaning "net") is a light-sensitive layer of 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 the film in a camera. Light striking the retina initiates a cascade of chemical and electrical events that ultimately trigger nerve impulses. These are sent to various visual centres of the brain through the fibres of the optic nerve.
It’s not quite what scientists expected – the width of blood vessels in the eye, at the back of the retina, may indicate brain health risks, such as dementia and alzheimers years before they actually set in according to a new study published in Psychological Science. It is already well known that young people who [...]
In the culmination of 15 years worth of painstaking research work related to retina implants, scientists from Germany and Hungary have for the first time demonstrated that a light sensitive electronic chip, implanted under the retina, can restore useful vision in patients blind from hereditary retinal degeneration. As part of the research, nine persons previously completely [...]
Eye contact plays a very important role in human interactions, however a recent research study made by psychologists at UC Santa Barbara found that looking below the eyes is the best place to get the feel of what a person is up to. Besides, apparently most of us are already hard-wired to fix our initial gaze to [...]
Detailed in a recently published study, a team of ophthalmologists have successfully managed to improve the vision of both of their trial patients, which were declared legally blind due to macular degeneration, by inserting human embryonic stem cells into one eye of each person. Significant improvements were recognized shortly after the procedure, and continued to [...]
An artificial brain has taught itself how to estimate the number of objects in an image without actually counting them, showcasing abilities displayed by many animals, as well as humans. Due to the fact that the model wasn’t preprogrammed with numerical abilities (it can’t count), it is believed that this skill emerged as a result [...]