6 Eye Symptoms You Should Never Ignore

VIDEO: Tips to improve your eyesight.
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Even if you can boast 20/20, you should pay a visit to an eye-care specialist: "The eyes are one place in the body through which we can actually see veins and arteries firsthand, with no surgery or cameras," says Dr. Shantan Reddy, an ophthalmologist and retinal specialist at New York University Langone Medical Center.

High blood pressure That's why an eye doctor may be the first to detect a serious health problem such as diabetes or high blood pressure. One example: Sixty-five percent of the time, eye doctors can spot signs of a patient's high cholesterol before any other health-care provider can (the condition shows up as yellowish plaques within the retinal blood vessels).

Behold, surprising health cues your eyes give away.

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6 Eye Symptoms You Should Never Ignore

It's might mean high blood pressure.

More than 20 percent of people with high blood pressure don't know they have it--a problem that could be solved if everyone visited their eye doctor more often.

"We can see hypertension through the eyes because it gives retinal arteries a silver or copper hue that we call copper wiring," says Reddy. If left untreated, the condition can cause blood vessels in the retina and throughout the body to harden, increasing the risk for heart attack or stroke.

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6 Eye Symptoms You Should Never Ignore

A mole on the eye's inner layer

It might mean melanoma.

Sunlight can wreak havoc on more than your skin--it may increase the risk of developing cancer inside the eyeball. "The cancer can look like little raised surfaces or moles in the pigment layer of the retina," says ophthalmologist Dr. Sophie J. Bakri of the Mayo Clinic in Rochester, Minn. Diagnosing an eye melanoma early is crucial, she says; it often has no other symptoms and can quickly metastasize to surrounding tissues.

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6 Eye Symptoms You Should Never Ignore

It might mean diabetes.

High blood sugar can clog or damage retinal blood vessels over time, rendering them weak and porous. Eye doctors can often spot the seepage or the new, abnormal blood vessels that sprout up to replace faulty ones. Indeed, diabetes takes a big toll on the eyes in general and can lead to blindness in serious cases.

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6 Eye Symptoms You Should Never Ignore

It might mean autoimmune disease.

Autoimmune conditions can cause the body to attack healthy cells and tissues (including those within the eyes), leading to inflammation. The process can lead to "If we see inflammation inside swollen ocular surface blood the eye, 30 to 50 percent of vessels and red, itchy, watery the time that patient will have some sort of undiagnosed autoimmune disease, like lupus or rheumatoid arthritis," says Bakri. Another related symptom? Severely dry eyes, the result of compromised tear glands.

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6 Eye Symptoms You Should Never Ignore

It could be central serous retinopathy or CSR.

It sounds gross, but you can get blisters inside your eyeballs. CSR is typically caused by excessive mental or emotional stress, which can tax the body so much that the retina starts to leak blister-forming fluid. "Eye doctors used to know CSR as a disease of stressed men with type-A personalities, but an increasing number of women are being diagnosed," says Bakri. The most common symptom is that patients may also have blurry vision or see wavy lines when trying to focus on a set point. In many cases, CSR can be alleviated by slashing stress levels; but if not, patients may be helped by laser treatment.

6 Eye Symptoms You Should Never Ignore

It might mean allergies.

Airborne allergens such as pollen, dust, and animal dander often affect the eyes. As a protective mechanism, your peepers secrete anti-inflammatory histamines and other natural chemicals--but not without side effects. The process can lead to swollen ocular surface blood vessels and red, itchy, watery eyes visible to you, your eye doctor, and everyone else. For a proper diagnosis, though, do see an M.D.

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