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Double vision, also known as diplopia, is a vision disorder in which a person perceives two images of a single object. This can occur with one eye (monocular diplopia) or both eyes (binocular diplopia).

1. Monocular Diplopia:

  • This occurs even when one eye is closed.

  • It can be caused by structural abnormalities of the eye, such as astigmatism, keratoconus, pterygium, or cataract.

  • Monocular diplopia typically needs to be addressed by treating the underlying eye condition.

2. Binocular Diplopia:

  • This occurs when both eyes are open but resolves when one eye is closed.

  • It is often due to a misalignment of the eyes, where the eyes do not align properly, causing the brain to perceive two images instead of fusing them into one.

  • Treatment may involve addressing the underlying cause, prism glasses to realign the images, vision therapy to coordinate the eyes and the brain, or surgery in some cases.

Causes of Double Vision:

  1. Neurological Issues:

    • Multiple sclerosis, strokes, or brain tumors can cause double vision by affecting the nerves that control the eye muscles.

  2. Muscular Issues:

    • Conditions like myasthenia gravis affect the muscles controlling eye movement, leading to double vision.

  3. Nerve Issues:

    • Conditions such as Guillain-Barré syndrome, diabetes, or cranial nerve palsy can affect the nerves controlling the eye muscles, leading to double vision.

  4. Eye Conditions:

    • Cataracts, refractive surgery complications, or irregularities in the cornea or lens can lead to double vision in one eye.

  5. Trauma:

    • Injury to the eye, orbit, or brain can lead to double vision.

  6. Graves' Disease:

    • This autoimmune disorder can cause swelling of the muscles and tissues around the eyes, leading to double vision.

Diagnosis and Treatment:

double vision image
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