Tag Archive | Nerve

Chapter 218 – Optic Nerve Blood Flow Measurement

Chapter 218 – Optic Nerve Blood Flow Measurement   COLM O’BRIEN ALON HARRIS   INTRODUCTION The fact that a substantial number of glaucoma patients (perhaps up to 30%) have normal intraocular pressure (IOP) at the time of initial diagnosis indicates that risk factors other than IOP alone contribute to the pathogenesis of optic nerve damage […]

Chapter 217 – Retinal Nerve Fiber Layer Analysis

Chapter 217 – Retinal Nerve Fiber Layer Analysis   NEIL T. CHOPLIN   INTRODUCTION Patients at risk for glaucoma may have optic nerves and visual fields of normal appearance, but they may still have nerve fiber layer defects that are indicative of early, undetected glaucomatous damage.[1] Thus, assessment of the retinal nerve fiber layer is […]

Chapter 193 – Prechiasmal Pathways—Compression by Optic Nerve and Sheath Tumors

Chapter 193 – Prechiasmal Pathways—Compression by Optic Nerve and Sheath Tumors   THOMAS C. SPOOR           DEFINITION • Optic nerve dysfunction as a result of compression by tumor or aneurysm anywhere along the nerve’s course from globe to chiasm.   KEY FEATURES • Progressive visual field loss. • Relative afferent pupillary […]

Chapter 132 – Coexistent Optic Nerve and Macular Abnormalities

Chapter 132 – Coexistent Optic Nerve and Macular Abnormalities   GARY C. BROWN MELISSA M. BROWN           DEFINITION • A heterogeneous group of optic nerve disorders that have secondary pathological effects on the macular retina.   KEY FEATURES • Structural changes of the optic nerve. • Secondary retinal detachment, retinoschisis, or […]