pupillary sphincter

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ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pupillary sphincter - a ring of smooth muscle surrounding the iris
eye, oculus, optic - the organ of sight
anatomical sphincter, sphincter, sphincter muscle - a ring of muscle that contracts to close an opening
References in periodicals archive ?
17 Mean [+ or -] standard deviation (11-50) (11-22) (minimum - maximum) Iris transillumination near the 23 4 pupillary sphincter Loss of peripupillary ruff 31 10 Peripupillary PEX 22 0 Pigment on the anterior surface 9 1 of iris Concentric transillumination 0 0 defect on iris Pigment accumulation on the 14 3 corneal endothelium PEX flecks on the corneal 6 0 endothelium Findings p Mean IOP (mmHg) Mean [+ or -] standard deviation 0.
This is mainly due to the nonlinear length-tension property of the pupillary sphincter and dilatory muscles (Usui & Clark, 1978.