• Simmons ST, Basic and Clinical Science Course: Section 10: Glaucoma, San Francisco, California: American Academy of Ophthalmology; 2005.
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    Glaucoma

    Defects in the nerve fiber layer are among the earliest signs of glaucoma damage and may precede detectable changes in the nerve. Damage may be diffuse or focal, resulting in a groove or wedge defect, as seen here, or may be diffuse. The nerve fiber layer can be visualized in photographs or by ophthalmoscopy.