What is diplopia?

Diplopia, also known as double vision, is a condition where an individual sees two images of a single object. It occurs when the eyes are not properly aligned, causing the brain to receive slightly different images from each eye. This can be a temporary condition, such as when one is tired or has consumed alcohol, or it may be a sign of an underlying medical condition. Diplopia can be classified as either monocular or binocular.

1. Monocular diplopia occurs when double vision is experienced with one eye open. It is usually caused by an issue with the cornea, lens, or retina of one eye. Conditions such as cataracts, corneal scarring, or retinal detachment can cause this type of diplopia.

2. Binocular diplopia occurs when double vision is experienced with both eyes open. It is more common and is caused by an imbalance in the muscles that control eye movement. This imbalance can be caused by several conditions, including:

- Strabismus (crossed eyes or turned eyes)

- Thyroid eye disease

- Myasthenia gravis (a neuromuscular disorder)

- Certain neurological conditions, such as stroke or brain tumors

Diplopia can cause difficulty with tasks such as reading, walking, and driving. If you experience double vision, it is important to see an eye doctor or ophthalmologist to determine the cause and receive appropriate treatment. Treatment options may include glasses, prisms, eye muscle exercises, or surgery, depending on the underlying cause of the diplopia.