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Astigmatism is a condition in which the cornea (the clear covering of the front of the eye) has an abnormal curve, causing out-of-focus vision.
Definition Astigmatism usually occurs when the front surface of the eye, the cornea, has an irregular curvature. Astigmatism is one of a group of eye conditions known as refractive errors.
But astigmatism may also result from an eye injury that has caused scarring on the cornea, from certain types of eye surgery or from keratoconus, a disease that causes a gradual thinning of the cornea. ...
Q: My eye doctor told me in my exam that my astigmatism got worse. Is this normal? ... In fact, most people have some. When you have astigmatism, light does not focus to a single point in your eye.
Britannica online encyclopedia article on astigmatism (eye disorder):Astigmatism results from a nonuniform curvature of the cornea that produces distorted vision. This …Encyclopædia Britannica, Inc ...
Astigmatism is an optical defect, whereby vision is blurred due to the inability of the optics of the eye to focus a point object into a sharp focused image on the retina. This may be due to an irregular or toric curvature of the cornea or lens. There are two types of astigmatism, regular and irre...
Moderate astigmatism can cause headaches and eye strain. ... Astigmatism can contribute to poor school performance but paradoxically it is usually not detected during routine eye screening in schools.
Brancato R, Carones F, Venturi E, Morico A, Gobbi PG. Photorefractive keratectomy for compound myopic astigmatism with an eye cup erodible mask delivery system. J Refract Surg 1996;12:501-510.
In ophthalmology, astigmatism is a refraction error of the eye in which there is a difference in degree of refraction in different ... For more information about the topic Astigmatism (eye), ...
Astigmatism Eye Surgery Procedures By Dr. Frank Thomnpson ... Astigmatism is a refractive error of the eye that is caused by an irregularly-shaped cornea.
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