One of the most vexing symptoms that can affect patients following modern cataract surgery is dysphotopsia. This photic phenomenon, which occurs in pseudophakic patients, has many different forms. So-called positive dysphotopsia is usually noted as phenomena such as light rings, arcs, streaks, flashes, and halos that may interfere with vision. These images are noted near the central axis of vision and can be induced by peripheral light sources. Positive dysphotopsia is usually related to bright artifacts of light on the retina. Tester et al. used the term dysphotopsia to describe the visual phenomena encountered by phakic and pseudophakic patients, including flashes of light, glare, and light sensitivity.
展开▼
