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In the phakic eye, exfoliative material on the crystalline lens is usually found in 3 zones: a central translucent disc, a clear intermediate zone, and a peripheral granular zone.1-3 The central disc corresponds to the pupillary diameter, and the intermediate zone is presumably caused by friction of the iris on the lens surface rubbing off the exfoliation material. The intermediate zone is not always clear, however, and may have bridging strands of the exfoliative material, sometimes referred to as radial striations.1-3We were impressed that the exfoliative material on the intraocular lens appeared to mimic these zones in a pattern consistent with iris movement. It had a circular central boundary, radial striations in the intermediate zone, and the material itself had the same size and granularity as occur on the crystalline lens. No material was seen in the central disc region, although this may be lacking
FitzSimon JS, Johnson DH. Exfoliation Material on Intraocular Lens Implants-Reply. Arch Ophthalmol. 1996;114(11):1429. doi:10.1001/archopht.1996.01100140629028