title: Evaluation of intraocular pressure in the immediate period after phacoemulsification.
abstract: OBJECTIVE
  To determine the incidence of hypotony or intraocular pressure (IOP) spikes in the early period after clear corneal phacoemulsification in normal and glaucomatous eyes.
  
  
  METHODS
  Ambulatory surgical center.
  
  
  METHODS
  This retrospective analysis comprised 112 eyes that had clear corneal phacoemulsification. Postoperative IOP measurements were collected 30 minutes, 1 day, and 1 month after surgery.
  
  
  RESULTS
  Twenty-three eyes had an IOP of 5 mm Hg or below 30 minutes postoperatively. The IOP at 30 minutes was lower than at 1 day in both the normal and the glaucoma group. The mean IOP in the normal group was 10.0 mm Hg +/- 4.3 (SD) at 30 minutes and 16.9 +/- 4.4 mm Hg at 1 day (P < or = .005). The means in the glaucoma group were 9.6 +/- 3.9 mm Hg and 16.9 +/- 5.7 mm Hg, respectively (P < or = .0002). The IOPs at 30 minutes and 1 day were not significantly different between the 2 groups.
  
  
  CONCLUSIONS
  A significant percentage of eyes having clear corneal phacoemulsification had an IOP of 5 mm Hg or less 30 minutes after surgery. Even though there were no postoperative complications from hypotony and there was a relative absence of significant IOP elevation 1 day postoperatively, the frequency of low IOP at 30 minutes suggests that consideration be given to leaving postoperative eyes with a higher IOP at the completion of phacoemulsification rather than with the estimated 10 mm Hg tactile IOP strived for in this study.
authors: Ophthalmic Consultants of Boston, Center for Eye Research and Education, Boston, Massachusetts 02114, USA.
authors: B J
authors: BJ
authors: Shingleton
authors: R A
authors: RA
authors: Wadhwani
authors: M W
authors: MW
authors: O'Donoghue
authors: S
authors: S
authors: Baylus
authors: H
authors: H
authors: Hoey
mesh_terms: D000368:Aged; D002386:Cataract / Q000150:complications; D002387:Cataract Extraction; D003315:Cornea / Q000601:surgery; D005260:Female; D005902:Glaucoma, Open-Angle / Q000150:complications; D006801:Humans; D007429:Intraocular Pressure; D019654:Lens Implantation, Intraocular; D008297:Male; D015814:Ocular Hypotension / Q000209:etiology*; D018918:Phacoemulsification / Q000009:adverse effects*; D011184:Postoperative Period; D012189:Retrospective Studies; D013997:Time Factors