title: Immediate changes in intraocular pressure after clear corneal micro-incision versus small-incision cataract surgery.
abstract: OBJECTIVE
  We sought to examine changes in intraocular pressure (IOP) in the immediate period after clear corneal micro-incision cataract surgery (MICS) and after small-incision cataract surgery (SICS).
  
  
  METHODS
  Sixty-eight eyes of 34 patients scheduled for coaxial phacoemulsification were randomized into one of two groups: (a) eyes that were to undergo a 2.0-mm MICS, and (b) a 2.65-mm SICS. At the conclusion of surgery, the IOP was adjusted to the range between 15-40 mmHg with stromal hydration. The IOP was measured using a rebound tonometer preoperatively, at the conclusion of surgery, and at 3, 6, 9, 12, and 15 min postoperatively. The Seidel test and anterior segment-optical coherence tomography were performed at 20 min postoperatively.
  
  
  RESULTS
  Mean IOP at the conclusion of surgery was 27.7 ± 4.7 mmHg in the MICS group and 29.7 ± 5.1 mmHg in the SICS group (p = 0.1239). In both groups, mean IOP decreased to the preoperative level within 9 min postoperatively and did not change significantly for up to 15 min. Mean IOP was similar between the MICS and SICS groups throughout the observation period (p ≥ 0.1239). Hypotony (≤10 mmHg), positive Seidel test, and loss of wound coaptation were not detected in all eyes.
  
  
  CONCLUSIONS
  After adjusting the IOP to a relatively high level at the conclusion of surgery, the IOP decreased within 9 min and was stable within 15 min without hypotony. The IOP was comparable between eyes after MICS and SICS, and both incisions virtually closed within 20 min postoperatively.
authors: Hayashi Eye Hospital, 4-23-35 Hakataekimae, Hakata-Ku, Fukuoka, 812-0011, Japan, hayashi-ken@hayashi.or.jp.
authors: Ken
authors: K
authors: Hayashi
authors: Motoaki
authors: M
authors: Yoshida
authors: Koichi
authors: K
authors: Yoshimura
mesh_terms: D000368:Aged; D003315:Cornea / Q000601:surgery*; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology*; D019654:Lens Implantation, Intraocular; D008297:Male; D008866:Microsurgery / Q000379:methods*; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D018918:Phacoemulsification / Q000379:methods*; D013997:Time Factors; D041623:Tomography, Optical Coherence; D014065:Tonometry, Ocular