- Irregularities in the cornea caused by infection, scarring or refractive surgery can make the light entering the eye scatter. This type of double vision is only in one eye and can often be treated by contact lenses or surgery.
- Changes in the lens of the eye (cataracts) which are caused by aging or injury can cause monocular double vision. The problem may be temporarily managed by a new pair of glasses, but cataract surgery is a more permanent solution.
- A muscle problem or weakness that causes one eye not to move evenly with the other can cause double vision. Diseases such as myasthenia gravis or Graves' disease can damage eye muscles.
- Diabetes, head trauma, high blood pressure, multiple sclerosis and other conditions can cause weakness in the cranial nerves (nerves that move the muscles of the eye). This type of double vision may resolve itself, but special glasses might be needed.
- Stroke, brain trauma, brain edema or any other disease that may cause brain damage can also cause double vision, depending on which part of the brain is injured. Treatment by a neurologist might be necessary.
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