astigmatism is a topic covered in the Taber's Medical Dictionary.

To view the entire topic, please or purchase a subscription.

Taber’s Cyclopedic Medical Dictionary Online + App from F.A. Davis and Unbound Medicine. Find 65,000 medical and nursing definitions. Download to iPhone, iPad, and Android. Explore these free sample topics:

Taber’s Online

-- The first section of this topic is shown below --

(ă-stig′mă-tizm )

[¹an- + Gr. stigma, stem stigmat-, point + -ism]
ABBR: As A form of ametropia in which the refraction of a ray of light is spread over a diffuse area rather than sharply focused on the retina. It is due to differences in the curvature in various meridians of the cornea and lens of the eye. The exact cause is unknown. Some types show a familial pattern.
astigmatic (as″tig-mat′ik), adj.
SYN: SEE: astigmia

-- To view the remaining sections of this topic, please or purchase a subscription --