ASTIGMATISM. ASTIGMATISM: PROGRAM. Astigmatism: program. Definition Epidemiology Classification Symptoms and signs Methods of measurement Prescription criteria Resolution of clinical cases. ASTIGMATISM: DEFINITION. Astigmatism: definition .
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Irregular corneal astigmatism
Regular corneal astigmatism
180°Astigmatism: classification III
180°Astigmatism: classification IV
The weaker meridian (flattest) is the one at 180º
Classification according to main meridians:
Classification according to refraction:
Compound hypermetropic astigmatism
+3,50Astigmatism: classification VIII
Example 1: +3,50-2,00x180º