Decreased visual acuity from optic disc drusen
R. W. Beck, J. J. Corbett, H. S. Thompson and R. C. Sergott
Although visual field defects occur commonly from optic disc drusen,
reduction in visual acuity is rare. We describe four patients with reduced
visual acuity and one with visual field constriction to the point of legal
blindness that resulted from optic disc drusen. The acute episodic and
stepwise nature of visual loss in some of the cases in our series suggests
a vascular mechanism. Reduced visual acuity from drusen remains a diagnosis
of exclusion. It should be considered, however, when visual loss has been
acute and nonprogressive or stepwise in a nerve fiber bundle distribution
and when visual acuity is not reduced until visual field constriction is
severe.
