Pupil

(pu'-pil). The Robertson, round aperture the iris of the eye. P., Argyll one in of the early symptoms of tabes, in which a myotic pupil responds on accommodative effort, but not to light. P., Artificial, an iridectomy made in an iris the pupil of which is occluded by inflammatory deposits. P., Cat's-eye, an elongated, slit-like pupil. P., Exclusion of, total posterior synechia, the entire pupillary edge of the iris being adherent to the capsule. P., Hutch in son's, one-sided dilatation of the pupil in hemorrhage from the middle meningeal artery. P., Occlusion of, the pupillary area is filled with semiopaque inflammatory exudation-products. P., Pinhole, extreme myosis.