pupillary ruff

pu·pil·lar·y ruff

the dark-brown, wrinkled rim of the normal pupil, which is the posterior pigment epithelium of the iris showing itself at the pupillary margin.

pupillary ruff

a brown wrinkled rim on the edge of the pupil, derived from posterior pigment epithelium of the iris.
References in periodicals archive ?
From a total of 32 unilateral PEX cases, 7 subjects demonstrated RNFL thinning in the clinically normal fellow eye; all of these eyes had evidence of pupillary ruff atrophy on slit-lamp examination in the absence of evident exfoliation material in the eye.