Double vision
Double Vision
Double vision, also known as Diplopia (pronounced dih-PLO-pee-uh), is a medical condition where an individual sees two images of a single object. This condition can occur either some or all of the time, depending on its cause.
Etymology
The term "double vision" is derived from the Latin word "duplex", meaning "double", and the Greek word "opsis", meaning "vision". The medical term "diplopia" comes from the Greek words "diploos", meaning "double", and "ops", meaning "eye".
Causes
Double vision can be caused by many conditions, including:
- Strabismus: This is a condition in which the eyes do not align properly. One eye may look straight ahead while the other eye turns inward, outward, upward, or downward.
- Cranial nerve palsy: This condition affects the nerves that control eye movements, leading to double vision.
- Cataracts: These are cloudy areas in the eye's lens, causing light to scatter as it passes through the lens, resulting in double vision in one or both eyes.
- Refractive surgery: Procedures such as LASIK can sometimes cause double vision.
Treatment
Treatment for double vision depends on the underlying cause. It may include:
- Eye exercises: Certain exercises can help improve alignment issues that lead to double vision.
- Surgery: In some cases, surgery may be required to correct the underlying issue causing double vision.
- Corrective lenses: These can help if the double vision is due to an issue with the eyes' refractive ability.
- Botox: In some cases, Botox injections can be used to help treat double vision.
Related Terms
- Monocular Diplopia: Double vision that persists in one eye when the other eye is closed.
- Binocular Diplopia: Double vision that only occurs when both eyes are open.
- Ghosting: A condition where the person sees a fainter second image, often overlapping with the primary image.
External links
- Medical encyclopedia article on Double vision
- Wikipedia's article - Double vision
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