title: Supraciliary effusions and ciliary body thickening after scleral buckling procedures.
abstract: OBJECTIVE
  The purpose of the study was to use ultrasound biomicroscopy to identify and quantity changes in anterior segment parameters after scleral buckling procedures.
  
  
  METHODS
  Ultrasound biomicroscopy was used to examine 15 patients with retinal detachment within 1 week before and after surgery. Quantitative measurements were performed of anterior chamber depth, supraciliary effusion depth, ciliary body thickness, and angle opening.
  
  
  RESULTS
  Supraciliary fluid was present after surgery in 12 patients (80%). Average supraciliary fluid depth was 0.16 +/- 0.13 mm. Ciliary body thickness measurements at a point 2-mm posterior to the scleral spur increased after surgery in all patients an average of 0.15 +/- 0.10 mm. There was a strong correlation between ciliary fluid levels and change in ciliary body thickness (r = 0.742, P < 0.01). Anterior chamber depth decreased after surgery in 14 patients (93%). A decrease of angle opening of greater than 5 degrees was noted in 11 patients (73%). In all of these 11 patients, the ciliary body and iris root were considered to be rotated anteriorly. Six (55%) of 11 of these patients showed anterior bowing of the iris, indicating pupillary block. Complete angle closure occurred over one to three quadrants in three patients, but none of these patients had complete angle closure or glaucoma.
  
  
  CONCLUSIONS
  Supraciliary effusions and ciliary body thickening are common after scleral buckling procedures and can produce conditions conducive to angle closure. Angle narrowing occurs through a combination of direct anterior iris rotation and induced pupillary block.
authors.affiliation: Department of Ophthalmology, Toronto Hospital, Ontario, Canada.
authors.forename: C J
authors.initials: CJ
authors.lastname: Pavlin
authors.forename: S S
authors.initials: SS
authors.lastname: Rutnin
authors.forename: R
authors.initials: R
authors.lastname: Devenyi
authors.forename: M
authors.initials: M
authors.lastname: Wand
authors.forename: F S
authors.initials: FS
authors.lastname: Foster
mesh_terms: D000867:Anterior Chamber / Q000000981:diagnostic imaging / Q000473:pathology; D000869:Anterior Eye Segment / Q000000981:diagnostic imaging / Q000473:pathology; D002924:Ciliary Body / Q000000981:diagnostic imaging / Q000473:pathology*; D005122:Exudates and Transudates / Q000000981:diagnostic imaging; D015812:Glaucoma, Angle-Closure / Q000209:etiology; D006801:Humans; D012163:Retinal Detachment / Q000601:surgery*; D012591:Scleral Buckling / Q000009:adverse effects*; D014463:Ultrasonography; D014603:Uveal Diseases / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology