It's one of the inescapable realities of aging: The older we get, the slower we tend to move—whether we're walking around the block or just reaching for the remote control.
Apr 23, 2024
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Scientists have identified an unexpected player in the immune reaction gone awry that causes vision loss in patients with age-related macular degeneration (AMD), according to a new study published today in eLife.
May 5, 2020
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A team of researchers from the UK and Spain has found evidence showing that contrary to popular belief, the orgasm face is not the same as the pain face. In their paper published in Proceedings of the National Academy of ...
COVID-19 is primarily a respiratory infection, but experts have suspected the virus can also infiltrate the eyes. Now, scientists have more direct evidence of it.
Oct 9, 2020
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World-leading eye experts have made a breakthrough that could potentially change the way cataracts are treated—with potential for drug therapy to replace surgery.
May 19, 2021
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A team led by researchers from Mass Eye and Ear, a member of Mass General Brigham, reports the results of a phase I trial of a revolutionary stem cell treatment called cultivated autologous limbal epithelial cell transplantation ...
Aug 18, 2023
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Cataracts, any ophthalmologist will tell you, are an extremely common side effect of growing older. Live long enough, and most people will develop this condition—a clouding of the normally clear eye lens—in one or both ...
Aug 23, 2022
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In the search for eternal youth, poo transplants may seem like an unlikely way to reverse the aging process.
May 4, 2022
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A team of surgeons in New York has performed the world's first transplant of an entire eye in a procedure widely hailed as a medical breakthrough, although it isn't yet known whether the man will ever see through the donated ...
Nov 9, 2023
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Mystical near-death experiences where people report a range of spiritual and physical symptoms, including out-of-body sensations, seeing or hearing hallucinations, racing thoughts and time distortion, affect around 10 per ...
Jun 29, 2019
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Eyes are organs that detect light, and send signals along the optic nerve to the visual and other areas of the brain[citation needed]. Complex optical systems with resolving power have come in ten fundamentally different forms, and 96% of animal species possess a complex optical system. Image-resolving eyes are present in cnidaria, molluscs, chordates, annelids and arthropods.
The simplest "eyes", such as those in unicellular organisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment.
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