Blurred vision happens when the path of light that stretches from the cornea all the way to the retina gets disturbed. Another source of blurry vision in one eye could be disorders in the optic nerves. Optic nerves transmit information to the brain and when these get askew, the images also get askewed. Blurry visions can be corrected by glasses or contact lenses but in some circumstances a thorough examination of the eye may have to be done to find out what could be wrong or what's causing the blurriness.
There are several causes of blurry vision. One of them is a need for eyeglasses. If a patient suffers from myopia or hyperopia, glasses may be needed. In nearsightedness and astigmatism, objects from a distance may appear blurry but nearby objects may be clear. The blurring that happens may be more acute at night or patients may experience seeing ghostly images or double vision. Usually, those in the mid-40s develop a need for reading glasses. Another cause of blurry vision could be cataract. Most people think cataracts only occur in older people, but it can also occur in younger people. Cataracts commonly occur in people who are over 50 years of age. Symptoms that accompany blurry vision include problems with seeing at night, glare problems and color problems. While this is a cause for concern, cataracts do not cause pain or the feeling that something is stuck in the eye. Other causes may be macular edema, macular degeneration, optic neuritis and diabetes.
Blurry vision in one eye can also be traced to flu. When you're sick, your immune system is down so you are most susceptible to infections. If you happen to be coughing as well, you might have also burst a blood vessel at the back of your eye.
You should call your doctor if you experience the following symptoms: if you see flashes in your vision, if you get the sensation that a curtain is being lowered into the part of your vision and if you have become unusually sensitive to light. Go see your doctor too if you have a foreign object lodged in your eye, if your contact lenses become uncomfortable if your blurry vision occurs right after an accident. This blurry vision may signal that you have internal bleeding or you might have fractured the bone surrounding your eye. Your doctor might recommend that you undergo laser eye surgeries or procedures that can relieve you of the discomforts you are experiencing.
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