title: Evaluation of pupillary block component in angle-closure glaucoma.
abstract: To evaluate the amount of the pupillary block component in primary angle-closure glaucoma, the dark-room prone-position test was carried out in 30 eyes of 20 primary angle-closure glaucoma patients, before and one month after argon laser iridotomy. The pupillary block component in the prone position (5.8 +/- 5.6 mmHg), which is the amount of reduction in IOP rise in the post-laser dark-room prone-position test, composed 67.8% of the IOP rise in the pre-laser dark-room prone-position test (8.6 +/- 5.6 mmHg). The amount of the pupillary block component correlated significantly with the IOP rise in the pre-laser dark-room prone-position test (r = 0.880, P < 0.001). The amount of the non-pupillary block component was relatively constant and correlated poorly with the IOP rise in the pre-laser dark-room prone-position test (r = 0.163, P = 0.386). The pupillary block component was significantly larger than the non-pupillary block component in the eyes with an IOP rise of > or = 7 mmHg in the pre-laser dark-room prone-position test (P < 0.01). The dark-room prone-position test could be useful in evaluating the pupillary block component in angle-closure glaucoma eyes and helpful in making a decision for laser iridotomy.
authors.affiliation: Glaucoma Service, Dr. Hong's Eye Clinic, Seoul, Korea.
authors.forename: C
authors.initials: C
authors.lastname: Hong
authors.forename: K H
authors.initials: KH
authors.lastname: Park
authors.forename: S M
authors.initials: SM
authors.lastname: Hyung
authors.forename: K Y
authors.initials: KY
authors.lastname: Song
authors.forename: D M
authors.initials: DM
authors.lastname: Kim
authors.forename: D H
authors.initials: DH
authors.lastname: Youn
mesh_terms: D000328:Adult; D000368:Aged; D003623:Dark Adaptation; D005260:Female; D015812:Glaucoma, Angle-Closure / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D007429:Intraocular Pressure; D007498:Iris / Q000601:surgery*; D053685:Laser Therapy; D008297:Male; D008875:Middle Aged; D016684:Prone Position; D011680:Pupil / Q000502:physiology*