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Eye and Vision
Johns Hopkins researchers have discovered a gene in fruit flies that helps certain specialized neurons respond more quickly to bright light.
Humans recognize differences in hue, saturation and brightness by using natural brain reflexes evolved from past experience.
In these blinding eye diseases, photoreceptor cells (rods and cones) degenerate and die.
Among the numerous image qualities that contribute to our sense of blur, only a subset of these qualities are used in the feedback system that controls eye growth.
Researchers are measuring this macular pigment that sits on the retina at the fovea, the point of highest vision acuity and best color vision, to better understand what a healthy, normal pigment looks like.
Human visual signs have been cross culturally selected to reflect common contours in natural scenes that humans have evolved to be good at seeing.
The scientists have discovered that a mutation in a common gene called calnexin can derail the light processing activity of cells and set in motion the gradual breakdown of vision.
A new treatment improves vision in patients suffering from macular degeneration.
Your eyes are what you eat, too: consuming foods rich in omega 3, such as tuna, may reduce dry eye risk by 68 percent.
A single dose of one antibiotic for treating trichiasis is more effective than a 6 week regimen of another antibiotic.
A Johns Hopkins Medicine study finds that a single dose of the oral antibiotic azithromycin taken after trichiasis eye surgery can reduce the frequency with which eyelashes turn back in and abrade the eye.
Contact lenses are safe, but have some risks not associated with glasses.
Treating trachoma, an eye infection that can lead to blindness, with a single mass antibiotic distribution in Ethiopian communities with high prevalence of infection is not effective in eliminating the disease.
The combination of these factors accounts for as many as one third of the cases of age related macular degeneration (AMD).
The symptoms vision problems could indicate a potentially serious retinal disorder.
Foods Rich in Vitamins E, Zinc, and Other Antioxidants Reduce Risk for Age-related Macular Degeneration
For persons with early age related macular degeneration (AMD) or a strong family history of the disease, high intake of these antioxidant nutrients from a regular diet may be protective.
Early malformation of the brainstem, which controls "lower" functions such as eye movement and breathing, may also lead to impairment in higher cognitive and behavioral function.
Some patients with glaucoma appear to have higher pressure in their eyes during sleep at night than during the day when it is usually measured.
Patients with severe uveitis, an inflammatory eye disease, often experience pain, sensitivity to light, visual impairment, and, in the worst cases, blindness.
Delaying the progression of the eye disease glaucoma from advancing to later stages is associated with lower cost of care.
Glaucoma is a group of eye diseases that damage the cells and fibers of the optic nerve and it is imperative that patients with glaucoma be well monitored for changes in their disease.
High dietary intake of antioxidants is associated with reduced risk of age related macular degeneration in elderly: common cause of irreversible blindness.
A system in which physicians are reimbursed for each procedure they perform is associated with a significantly higher rate of cataract surgery.
Implants of cells from the human retina improved motor symptoms in patients with Parkinson disease.
Although nursing home residents with vision impairing cataract face significant obstacles to obtaining surgical services.
Researchers have discovered a new gene for retinitis pigmentosa (RP), a group of inherited diseases that result in degeneration of the eye's retina.