opthamology

A type of opsin known as neuropsin is expressed in the hair follicles of mice and synchronize the skin’s circadian clock to the light-dark cycle, independent of the eyes or brain, University of Washington researchers report. “This is the first functional demonstration of opsin photoreceptors outside the eye directly controlling circadian rhythms in a mammal,”… Read more

A study from researchers at Indiana University has found that a major chemical component in marijuana appears to worsen the primary underpinning of glaucoma: a rise in pressure inside the eye. Treatment of glaucoma is among the most commonly proposed uses of medical marijuana. The chemical that causes this rise in pressure is cannabidiol, or… Read more

Two types of cells have been found in the retina that determine horizontal or vertical orientation, Northwestern Medicine scientists report. They have also demonstrated for the first time how they convey information. The laboratory of Gregory Schwartz, Ph.D., assistant professor of Ophthalmology and Physiology, investigates the retina, a layer of tissue at the back of… Read more

Every few seconds, our eyelids automatically shutter and our eyeballs roll back in their sockets. Why don’t we perceive intermittent darkness and light? New research shows that when we blink, our brain re-positions our eyeballs so we can stay focused on what we’re viewing. When our eyeballs roll back in their sockets during a blink… Read more

For many years scientists have been trying to find a way to measure the pressure in a patient’s brain without having to drill a hole in the person’s skull. Although this remains the most reliable way to measure pressure in the brain, it is invasive, expensive and comes with the risk of infection and bleeding… Read more