![]() Proponents of the mechanical theory hypothesize that disc hemorrhages result from mechanical shearing at the lamina cribrosa or damage to the capillary network at the border of retinal nerve fiber layer defect enlargement. Two primary hypotheses exist: mechanical and ischemic vascular. Etiology and Pathophysiology Mechanical and Vascular HypothesesĪlthough disc hemorrhages have been the subject of tremendous research, the exact mechanism by which they appear remains elusive. Less commonly, a disc hemorrhage may be noted in the peripapillary retinal nerve fiber layer reaching within one disc diameter of the optic disc margin. Alternately, deeper disc hemorrhages may appear round and blotchy. Classically, these hemorrhages are located in the prelaminar optic disc, cross the peripapillary zone, and extend into the adjacent superficial retinal nerve fiber layer, although they may not occupy the entire length from disc to retina. 3.1.2.2 Recurrent Disc Hemorrhages: The two-population hypothesisĪlternate names: optic disc hemorrhage, Drance hemorrhage, splinter hemorrhage, nerve fiber layer hemorrhage, optic nerve head hemorrhage.ĭisc hemorrhages are splinter or flame-shaped hemorrhages oriented perpendicular to the optic disc margin ( Figure 1).3.1.1.1 Do all individuals with disc hemorrhage develop glaucoma?.2.1 Physical Examination and Clinical Diagnosis.1.2.1 Mechanical and Vascular Hypotheses.
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