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Normal fundus photographs of the left eye (left image) and right eye (right image), seen from front so that left in each image is to the person's right. Each fundus has no sign of disease or pathology. The gaze is into the camera, so in each picture the macula is in the center of the image, and the optic disk is located towards the nose. Both ...
Most people in the world depend on the sun to get vitamin D, [31] and elderly populations in low UVB countries experience higher rates of cancer. [32] There are not many foods that naturally have vitamin D. [33] Examples are cod liver oil and oily fish. If people cannot get sunlight, then they will need 1,000 IU of vitamin D per day to stay ...
In people with Cushing syndrome, “too much cortisol leads to a more rounded face, pinkish red cheeks, thinner skin with easy bruises, a puffy neck, and a worsening upper back hump,” Dr. Ghalib ...
Scleral tattooing is the practice of tattooing the sclera, or white part, of the human eye. Rather than being injected into the tissue, the dye is injected between two layers of the eye, then gradually spreads. The process remains uncommon due to professionals' discomfort performing the procedure [ 1] and is illegal in the American states ...
We've all grown up thinking that sitting too close to the television is damaging to our eyes ... but that might not be the case. Technology spawns lots of confusion ... and a few affectionately ...
Blue light, a type of high-energy light, is part of the visible light spectrum. High-energy visible light (HEV light) is short-wave light in the violet/blue band from 400 to 450 nm in the visible spectrum, which has a number of purported negative biological effects, namely on circadian rhythm and retinal health (blue-light hazard), which can lead to age-related macular degeneration.
Healthy candy is a misnomer, experts say. While candy can be part of a healthy diet, in moderation, it does not count as a health food, says Jay — even if it's sugar-free or low-calorie. "Some ...
Adaptation (eye) In visual physiology, adaptation is the ability of the retina of the eye to adjust to various levels of light. Natural night vision, or scotopic vision, is the ability to see under low-light conditions. In humans, rod cells are exclusively responsible for night vision as cone cells are only able to function at higher ...