Astigmatism means that a corneal or lens surface is oval like a rugby ball
instead of spherical like a basketball. Most astigmatic surfaces have two
curves – a steeper curve and a flatter curve. This causes light to focus
on more than one point in the eye, resulting in blurred vision at distance or
near. Astigmatism often occurs along with nearsightedness or farsightedness.
Signs and Symptoms
Blurred vision (near and distance)
Detection and Diagnosis
Astigmatism can be detected and measured with corneal topography,
keratometry, vision testing and refraction.
Astigmatism can be corrected with glasses, contact lenses, or surgically.
The most common surgeries used to correct corneal astigmatism are astigmatic
keratotomy (procedures that involve placing a microscopic incision on the
cornea) and LASIK. The objective of these procedures is to reshape the
cornea so it becomes more spherical or uniformly curved.