Astigmatism is a common kind of refractive error that affects the eye. In this condition, the eye fails to focus light evenly onto the light-sensitive tissue at the back of the eye, the retina.
The bending of light as it moves through one article to another is Refraction. Vision happens when light rays refract (bend) as they pass through the lens and the cornea. This light is the focuses on the retina. The retina transforms the light rays into signals that are sent to the brain by the optic nerve. The brain interprets these signals into the visuals we see.
How does it happen?
Astigmatism happens when the light is angled differently based on where it strikes the cornea and passes from the eyeball. The cornea of a healthy eye is curved like basketball, with the same measure of roundness all over. In astigmatism, the cornea of the eye is curved more like a football, with some areas that are more rounded or steeper than others. This can result in the formed images to appear stretched out and blurry.In some cases, astigmatism may develop as a post-procedure complexity of eye surgery or eye injury.
