Question

an astigmatism is a misshaped _________ that causes objects to look blurry

Answer 1

Astigmatism is a type of refractive error of the eye. Refractive errors cause blurred vision and are the most common reason why a person goes to see an eye professional. People sometimes need glasses or contacts because they have an astigmatism. The cornea of the eye is irregularly shaped in an eye with astigmatism.
For more information visit:
http://www.aoa.org/patients-and-public/eye-and-vision-problems/glossary-of-eye-and-vision-conditions/astigmatism?sso=y
http://www.allaboutvision.com/conditions/astigmatism.htm