Astigmatism – Caused by a difference in curvature of your cornea. The cornea is curved and the prescription is different in two different meridians. If you have astigmatism objects may have a shadow image or double image without correction. If you wear contacts with astigmatism the second number is the astigmatism amount. This amount goes in a certain direction denoted by the x (axis) or orientation of the power. If you wear gas permeable contact lenses you likely have astigmatism.
(example: -2.00 -1.50 x 180 soft TORIC contact lens power)
Astigmatism is characterized by an irregularly-shaped cornea which causes light images to focus on two separate points in the eye, creating a distorted image. Symptoms range from visual discomfort in mild cases, to severe blurring and distortion similar to a reflection in a funhouse mirror.
Contact lenses designed to correct this condition are fitted to each individual. The misshapen cornea is measured and special toric lenses are used to direct light rays to one spot on the retina.
Astigmatism is characterized by an irregularly-shaped cornea which causes light images to focus on two separate points in the eye, creating a distorted image. Symptoms range from visual discomfort in mild cases, to severe blurring and distortion similar to a reflection in a funhouse mirror.
Contact lenses designed to correct this condition are fitted to each individual. The misshapen cornea is measured and special toric lenses are used to direct light rays to one spot on the retina.