Category: Retina

The importance of being protected: How to choose your sunglasses

Experts from the University of Alicante (UA) have found that prolonged exposure to the sun increases the chance of developing alterations in the lens by 4%. Choosing the right pair of sunglasses can reduce such complications. Despite the fact that the vast majority of the harmful radiation from the sun is absorbed by the atmosphere,… Read More


New test needed to assess the quality, safety of sunglasses

Revision of standards is needed to test sunglasses quality and establish safe limits for the lenses’ UV filters, according to research published in the open access journal Biomedical Engineering OnLine. Exposure to the sun may deteriorate your sunglasses over time and the lenses may become lighter and so alter the category under which they are… Read More


Artificial retinas: Promising leads towards clearer vision

A major therapeutic challenge, the retinal prostheses that have been under development during the past ten years can enable some blind subjects to perceive light signals, but the image thus restored is still far from being clear. By comparing in rodents the activity of the visual cortex generated artificially by implants against that produced by… Read More


Surprise discovery in the blink of an eye

We probably do it every day, but scientists have only just discovered a distinct new way in which we move our eyes. The team from the University of Tübingen in Germany assessed the eye movements of 11 subjects using tiny wires attached to the cornea and with infrared video tracking. In results published in eLife,… Read More


June 2016 is Fireworks Eye Safety Month

PCVI and many other eye health providers support the sound warnings regarding firework eye safety. With the Fourth of July only a matter of weeks away, it’s important to review reminders that can serve as a real protection. According to the U.S. Consumer Product Safety Commission, fireworks are involved in thousands of injuries treated in… Read More


Visual acuity

Visual acuity (VA) is acuteness or clearness of vision, especially form vision, which is dependent on the sharpness of the retinal focus within the eye, the sensitivity of the nervous elements, and the interpretative faculty of the brain. VA is a quantitative measure of the ability to identify black symbols on a white background at… Read More


Our brain suppresses perception related to heartbeat, for our own good

Our heart is constantly beating yet we normally do not feel it. It turns out that our brain is capable of filtering out the cardiac sensation so that it doesn’t interfere with the brain’s ability to perceive external sensations. For the first time, researchers from the Center for Neuroprosthetics at EPFL have identified this mechanism…. Read More


Vessel damage may precede diabetic retinopathy, researchers find

A University of Iowa-led study of diabetes-related vision impairment holds good news — and some bad news — for patients with signs of these disorders. Scientists have long known that patients with diabetes mellitus — both Type 1 and Type 2 — are at high risk for developing diabetic retinopathy, the most common cause of… Read More


Gene therapy shows long-term benefit for treating rare blindness

Pioneering gene therapy has restored some vision to patients with a rare form of genetic blindness for as long as four years, raising hopes it could be used to cure common causes of vision loss, new University of Oxford research published today shows. A technique which involves injecting a virus into the eye to deliver… Read More


Surprising central role of darks in brain visual maps

Scientists have been studying how visual space is mapped in the cerebral cortex for many decades under the assumption that the map is equal for lights and darks. Surprisingly, recent work demonstrates that visual brain maps are dark-centric and that, just as stars rotate around black holes in the Universe, lights rotate around darks in… Read More


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