title: Intraocular pressure during femtosecond laser pretreatment: comparison of glaucomatous eyes and nonglaucomatous eyes.
abstract: OBJECTIVE
  To compare changes in intraocular pressure (IOP) during femtosecond laser pretreatment of cataract between glaucomatous eyes and nonglaucomatous eyes.
  
  
  METHODS
  Launceston Eye Institute and Launceston Eye Hospital, Launceston, Australia.
  
  
  METHODS
  Nonrandomized interventional prospective case series.
  
  
  METHODS
  Patients with clinically stable primary open-angle glaucoma (POAG) having femtosecond laser pretreatment were compared with a concurrent cohort of patients with healthy eyes having the same procedure. Pretreatment was performed using a fluid-filled optical docking system (Liquid Optics Interface). With the patient supine, the IOP was measured at 4 time points using a rebound tonometer (Icare Pro).
  
  
  RESULTS
  The study comprised 143 eyes of 97 patients. Forty-three eyes (30.1%) had documented glaucoma. The mean baseline IOP was 20.2 mm Hg ± 4.2 (SD) in glaucomatous eyes and 18.9 ± 4.0 mm Hg in nonglaucomatous eyes (P = .06). The mean change in IOP values between each time frame and baseline was as follows: vacuum-on, 13.8 ± 9.9 mm Hg and 11.1 ± 6.9 mm Hg, respectively (P = .06); after treatment, 17.4 ± 7.4 mm Hg and 14.1 ± 7.2 mm Hg, respectively (P = .014); after undocking of vacuum, 9.9 ± 5.4 mm Hg and 8.7 ± 5.7 mm Hg, respectively (P = .24).
  
  
  CONCLUSIONS
  Femtosecond pretreatment caused a greater transient rise in IOP after treatment and a higher residual IOP after vacuum undocking in glaucomatous eyes than in nonglaucomatous eyes. This is well tolerated short term; however, long-term implications for eyes with glaucoma are unknown at present.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors: From the Launceston Clinical School (Darian-Smith, Howie), University of Tasmania, and the Tasmanian Eye Institute (Darian-Smith, Howie, Abell, Allen, Vote, Toh), Launceston, Tasmania, and the Royal Victorian Eye and Ear Hospital (Abell, Kerr), Melbourne, Victoria, Australia. Electronic address: edar2754@gmail.com.
authors: Erica
authors: E
authors: Darian-Smith
authors: From the Launceston Clinical School (Darian-Smith, Howie), University of Tasmania, and the Tasmanian Eye Institute (Darian-Smith, Howie, Abell, Allen, Vote, Toh), Launceston, Tasmania, and the Royal Victorian Eye and Ear Hospital (Abell, Kerr), Melbourne, Victoria, Australia.
authors: Allister R
authors: AR
authors: Howie
authors: From the Launceston Clinical School (Darian-Smith, Howie), University of Tasmania, and the Tasmanian Eye Institute (Darian-Smith, Howie, Abell, Allen, Vote, Toh), Launceston, Tasmania, and the Royal Victorian Eye and Ear Hospital (Abell, Kerr), Melbourne, Victoria, Australia.
authors: Robin G
authors: RG
authors: Abell
authors: From the Launceston Clinical School (Darian-Smith, Howie), University of Tasmania, and the Tasmanian Eye Institute (Darian-Smith, Howie, Abell, Allen, Vote, Toh), Launceston, Tasmania, and the Royal Victorian Eye and Ear Hospital (Abell, Kerr), Melbourne, Victoria, Australia.
authors: Nathan
authors: N
authors: Kerr
authors: From the Launceston Clinical School (Darian-Smith, Howie), University of Tasmania, and the Tasmanian Eye Institute (Darian-Smith, Howie, Abell, Allen, Vote, Toh), Launceston, Tasmania, and the Royal Victorian Eye and Ear Hospital (Abell, Kerr), Melbourne, Victoria, Australia.
authors: Penny L
authors: PL
authors: Allen
authors: From the Launceston Clinical School (Darian-Smith, Howie), University of Tasmania, and the Tasmanian Eye Institute (Darian-Smith, Howie, Abell, Allen, Vote, Toh), Launceston, Tasmania, and the Royal Victorian Eye and Ear Hospital (Abell, Kerr), Melbourne, Victoria, Australia.
authors: Brendan J
authors: BJ
authors: Vote
authors: From the Launceston Clinical School (Darian-Smith, Howie), University of Tasmania, and the Tasmanian Eye Institute (Darian-Smith, Howie, Abell, Allen, Vote, Toh), Launceston, Tasmania, and the Royal Victorian Eye and Ear Hospital (Abell, Kerr), Melbourne, Victoria, Australia.
authors: Tze'Yo
authors: T
authors: Toh
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction / Q000379:methods*; D063171:Corneal Pachymetry; D005260:Female; D005902:Glaucoma, Open-Angle / Q000150:complications* / Q000503:physiopathology; D006068:Gonioscopy; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D053685:Laser Therapy; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D014065:Tonometry, Ocular; D014792:Visual Acuity / Q000502:physiology