Is there a disease that could cause blindness andor deafness over night?

Yes, there are a few diseases that could cause blindness and/or deafness overnight.

Sudden Deafness

Sudden deafness is a condition in which a person loses hearing in one or both ears suddenly. It can occur overnight or over a few days. The exact cause of sudden deafness is often unknown, but it may be due to a viral infection, a problem with the blood supply to the inner ear, or an autoimmune disorder.

Sudden Blindness

Sudden blindness is a condition in which a person loses vision in one or both eyes suddenly. It can occur overnight or over a few days. The most common cause of sudden blindness is a stroke, which is a disruption of blood flow to the brain. Other causes of sudden blindness include retinal detachment, a condition in which the retina (the light-sensitive tissue at the back of the eye) pulls away from the eye wall, and optic nerve damage.

Other Conditions

In addition to sudden deafness and sudden blindness, there are a number of other conditions that could cause blindness and/or deafness over time. These include:

* Ménière's disease: A disorder of the inner ear that can cause dizziness, hearing loss, and tinnitus (ringing in the ears).

* Autoimmune inner ear disease: A group of disorders in which the body's immune system attacks the inner ear.

* Genetic disorders: Some genetic disorders, such as Usher syndrome, can cause both hearing loss and vision loss.

If you experience sudden blindness or deafness, it is important to see a doctor immediately to determine the cause and receive treatment.