How to Reduce Error in Optic Nerve Head Examination

Diagnosis of glaucoma requires more than the optic nerve head (ONH) evaluation findings alone, but ONH assessment is crucial to detection of glaucoma, assessment of severity, and monitoring for disease progression. Objective assessment of the ONH must be done independent of other clinical features. This chapter explores the process of examining the disc for glaucoma, where errors may occur, and strategies to avoid them.