الفهرس 
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Abstract
Angle-closure glaucoma is a leading cause of irreversible blindness.
Diagnosis and treatment are strongly related to angle assessment
techniques
Gonioscopy:
Gonioscopy is the current reference standard for assessing ACA
structures and configuration. It requires a subjective assessment by
an observer placing a contact lens on the eye of the patient.
Definitions of angle findings vary across grading schemes.
Gonioscopy is prone to potential measurement errors including
artificially opening the angle or closing the angle due to how the lens
is placed on the eye. (Friedman & Mingguang , 2008)
Key Words:
Outflow Apparatus Anatomy, Anterior chamber angle
assessment techniques, Comparative studies of different
techniques of angle assessment