Astigmatism, unlike normal vision, occurs when the cornea is shaped like a football (more curved in one direction than the other) and often occurs in combination with myopia (nearsightedness) and hyperopia (farsightedness). This causes light to focus on more than one point on the retina, resulting in blurry and distorted vision.

Symptoms of astigmatism: 

• Blurry, distorted vision at all distances
  

Causes of astigmatism:

• Heredity
  
• Lid swellings such as chalazia
  
• Corneal scars
  
• Keratoconus