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Blurred vision in one eye

Updated on November 19, 2013

Individuals who experience any kind of ocular impairment usually visit a doctor to seek treatment for blurred vision in one eye. It is generally the first symptom that one notices, which indicates the presence of an eye disorder. Therefore, it may be noted that even though the underlying disease may vary, blurred vision in one eye is invariably elicited as the first symptom. Blurriness in one eye is typically indicative of abnormality occurring within that particular eye.

Symptoms accompanying blurred vision in one eye

There are many signs and symptoms which may occur along with blurred vision in one eye. They are as follows:

  • Dry eyes

  • Photosensitivity or elevated sensitivity to light

  • A halo or glare may occur around lights

  • Increased discharge or tearing from the eye

  • Poor nocturnal vision

  • Bloodshot or reddish, sore eyes

When the below listed symptoms accompany blurred vision in one eye, then it is indicative of a serious underlying condition. The symptoms include:

  • Behavioral or mental changes, including delirium, hallucinations, confusion, delusions, and lethargy

  • Dip in alertness or consciousness levels, such as unresponsiveness or fainting

  • Weakness or numbness affecting one side of the body

  • Rapid onset of extreme headaches

  • Sudden eye pain, loss or change of vision in the affected eye

Causes of blurred vision in one eye

Blurred vision in one eye, or both the eyes, is generally caused due to disturbances to the path of light travelling between the cornea and retina. It can be caused due to various reasons, some of which are listed below:

  • Glaucoma: It is caused due to unexpected buildup of fluid pressure in the eyeball. It is a serious disorder and untreated cases can result in permanent blindness. Common symptoms of glaucoma include eye pain and presence of halo around light sources.

  • A mini-stroke: One of the first signs of a mini-stroke is blurred vision in one eye. It is generally a precursor to a massive stroke. Patients may also experience dizziness, headache, numbness and tingling sensation on one side of the body.

  • Farsightedness or nearsightedness: It may be noted that farsightedness or nearsightedness hardly ever affects just one eye. However, these conditions can cause blurred vision in one eye. Since, most cases of myopia or hyperopia remain undetected for long periods, the other healthy eye which is compensating for the lowered vision in one eye also deteriorates due to the overload of work. Patients need to correct the vision via contact lenses or glasses.

  • Macular degeneration: It is a condition which generally affects individuals over the age of 60 years. It is characterized by slow loss of vision, distortion and blurriness. People who experience a rapid loss of vision in both the eyes, or just one eye, are most likely to have a macular opening on the retina.

  • Cataract: One of the most common causes of blurred vision in one eye is cataract. It is another condition which typically affects people over the age of 50 years. It may also be noted that cataract generally tends to develop in one eye at a time. The disorder can be easily seen with the naked eye, and hence easily detected at home as well. Patients need to undergo a cataract surgery to cure the condition.

  • Diabetic retinopathy: Blurred vision in one eye or sudden loss of vision can also be attributed to diabetic retinopathy in diabetic patients. The blurred vision is usually the result of retinal damage. Untreated cases of diabetic retinopathy can lead to permanent blindness.

  • Side effects of medicines: Some types of allergy drugs and eye drops have preservatives which can cause irritation and blurred vision in one eye, or both eyes. You may alleviate the condition by using artificial tear drops or prescription drugs for dry eyes.

  • Lasik surgery: Individuals who have undergone Lasik surgery to correct eye vision may experience blurred vision for a few days after the surgery. It is quite common. However, if blurry vision continues for several days after the eye surgery, then it signifies a complication of the surgery. Patients need to consult the eye surgeon for remedial measures.

  • Migraine: It is a kind of vascular headache. Blurred vision in one eye is one its primary symptoms. The condition is also characterized by a variety of other symptoms such as spots and flashes of light, vomiting, extreme headaches, and nausea. Blurred vision in one eye along with headaches is a sure-shot sign of migraines.

  • Different kinds of infections: All infections impair the immune system which can result in blurred vision in one eye or both the eyes. Ocular herpes can lead to blurriness and inflammation of the eyes. Excessive coughing due to infection can result in rupture of the blood vessels located behind the eyes, leading to blurred vision in one eye. Injuries and accidents can also damage the eyes and cause blurred vision.

Treatment of blurred vision in one eye

Treatment of blurred vision in one eye is focused at diagnosed the underlying cause of the condition and then taking remedial steps to cure that disorder. Patients need to visit a doctor whenever they experience blurred vision in one eye.


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