What your eyes reveal about your health?

What do your eyes reveal about your health?


East Anglia (UK), May 10

Scientists at the University of California, San Diego, have developed a smartphone app that can detect early signs of Alzheimer’s disease and other neurological conditions. The app uses a phone’s near-infrared camera to track changes in the size of a person’s pupils at a level of less than a millimeter. These measurements can then be used to assess that person’s cognitive status.

With the development of technology, the eye will prove to be more and more useful as a means of diagnosing all kinds of diseases and conditions because the eye, being transparent, requires less invasive examination methods than other parts of the body. But even without technology, it is possible to detect a number of health problems just by looking into the eyes. Here are some warning signs.

pupil size

The pupil responds to light immediately, becoming smaller in bright environments and larger in dim ones. Slow or delayed pupil size responses can indicate many diseases that can include serious conditions such as Alzheimer’s disease, as well as the effects of medications and evidence of substance abuse. Dilated pupils are common in those who abuse stimulant drugs, such as cocaine and amphetamines. Very young pupils can be seen in heroin abusers.

red or yellow eyes

A change in the color of the sclera (“the white of the eye”) indicates that something is not right. A red, bloodshot eye can be caused by excessive alcohol or drug abuse. It can also be caused by irritation or an infection that in most cases clears up within days.

If the change in color is persistent, it may indicate an infection, inflammation, or a more serious reaction to contact lenses or their solutions. In extreme cases, a red eye indicates glaucoma, a vicious disease that can lead to blindness.

When the sclera turns yellow, this is the most obvious sign of jaundice and an affected liver. The underlying causes of jaundice vary widely. They include hepatitis (inflammation of the liver), genetic or autoimmune diseases, and certain medications, viruses, or tumors.

red spot

A red spot on the white of the eye (subconjunctival hemorrhage) can look frightening and is almost always the result of a small localized blood vessel bursting. Most of the time there is no known cause and it disappears within days. However, it can also be an indicator of high blood pressure, diabetes, and blood clotting disorders that cause excessive bleeding. Blood-thinning medications such as aspirin can also be the cause, and if the problem is recurring, it may suggest that the dosage should be revised.

knock around the cornea

The white or gray ring around the cornea is often associated with high cholesterol and an increased risk of heart disease. It can also reveal alcoholism and can sometimes be seen in the eyes of elderly people, which is why the medical name it is given is arcus senilis.

fat lump

Sometimes the most annoying features that can appear on the eye are actually the most benign and easy to treat. The yellowish fatty mass that can appear on the white of the eye is the pinguecula, which is a small deposit of fat and protein that can be easily treated with eye drops or removed by a simple operation.

A pterygium, which appears as a pink tumor on the white of the eye, does not pose a threat to sight until it begins to grow over the cornea (the colored part of the eye).

Fortunately, the pterygium grows very slowly. As with the pinguecula, it can be removed easily. In fact, it must be removed well before it reaches the cornea. If the pterygium is allowed to continue to grow, it will form an opaque “membrane” over the cornea that will obstruct vision. It is believed that one of the main causative agents of both pinguecula and pterygium is chronic exposure to ultraviolet radiation from the sun.

puffy eyes

Puffy eyes can be part of a normal facial feature, but when eyes that were not previously bulging start to protrude forward, the most obvious cause is a thyroid problem and needs medical attention. One puffy eye can result from an injury, infection, or in rare cases, a tumor behind the eye.

Swollen or twitching eyelids

Eyelids can also indicate many diseases. These are mostly associated with minor conditions of the glands in the eyelids. A common condition is a boil or chalazion, which appears as a red lump on the upper eyelid and, less often, below the eyelid and is caused by a blockage of the sebaceous gland. The stickiness generally goes away on its own or with warm compresses. If it persists, it must be removed with a simple procedure.

Eyelid twitching (myokymia) can be an irritation, even embarrassment, and is often much worse than it looks. In most cases, it is completely harmless and can be linked to stress, nutrient imbalance, or consuming too much caffeine. (Conversation)

2022-05-10 06:15:00

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