Question

what is astigmatism? cause of astigmatism? correction this disease.

Answer 1

Astigmatism is a type of eye disorder in which the eye does not focus light evenly on the retina. This results in blurred and unclear vision at all distances. 
Astigmatism occurs when light is bent differently depending on where it strikes the cornea and passes through the eyeball. 
Treatments include prescription glasses or contact lenses. Laser-assisted surgery, such as LASIK, may also help.

Answer 2

Answer:

Astigmatism is a type of eye disorder in which the eye does not focus light evenly on the retina. This results in blurred and unclear vision at all distances.