Astigmatism: Pathogenesis and clinical findings
Astigmatism ...
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Description

Astigmatism: Pathogenesis and clinical findings

Astigmatism - deviation from spherical curvature of the lens or eye



Refracting power of the cornea is different in one meridian than in another =>

 • With the rule astigmatism: cornea is steepest in vertical meridian -> Light rays from vertical meridian form horizontal line foci

 • Against the rule astigmatism: cornea is steepest in horizontal meridian -> Light rays from horizontal meridian form vertical line foci

 => Parallel rays of light passing through the cornea are brought to different points of focus on the retina

 • Reduced visual acuity

 • Distortion Of Vision

 • Headache

 • Ocular fatigue



#astigmatism #pathophysiology #ophthalmology 
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The Calgary Guide to Understanding Disease
@TheCalgaryGuide
Account created for The Calgary Guide to Understanding Disease - Linking pathophysiology to clinical presentation - http://calgaryguide.ucalgary.ca/
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