What is Astigmatism?
Astigmatism is a common eye condition caused by an irregular shape of the cornea or lens. This irregular shape disrupts the way light focuses on the retina, resulting in blurry or distorted vision.
The Physiological Principle of Astigmatism
In a normal eye, the cornea and lens are smooth and round, like a basketball. This ensures that light focuses evenly on the retina, the part of the eye that receives light and sends signals to the brain. However, in an eye with astigmatism, the cornea or lens may be shaped more like a football or rugby ball, causing light to focus unevenly. This results in blurred or distorted vision, and can also cause symptoms like eye fatigue, headaches, and difficulty seeing at night.
