Intraocular pressure and wound state immediately after long versus short clear corneal incision cataract surgery
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To compare the intraocular pressure (IOP) and wound state immediately after cataract surgery for eyes with a long clear corneal incision (CCI) with those for eyes with a short CCI.
Randomized clinical trial.
One hundred twenty-eight eyes of 128 patients scheduled for phacoemulsification were randomly assigned to undergo long (≥ 1.75 mm) or short (< 1.75 mm) CCI (2.4-mm wide). IOP was measured using a rebound tonometer preoperatively, at the conclusion of surgery, and at 30 min, 60 min, 120 min, 180 min, and 24 h postoperatively. Wound architecture determined using anterior segment-optical coherence tomography and flare intensity was examined at 60 min postoperatively.
The mean incision length was significantly longer in the long CCI group (2.02 ± 0.19 mm) than in the short CCI group (1.50 ± 0.13mm; P < .0001). The mean IOP significantly increased at 120 min and 180 min postoperatively (P ≤ .0005) and returned to the preoperative level within 24 h. The mean IOP did not differ significantly between the long and short CCI groups at any follow-up period. The incidence of IOP lower than 10 mmHg did not differ significantly between the groups. The mean flare intensity was significantly greater in the short CCI group than in the long CCI group (P = .0122). The wound architecture was similar between the groups.
IOP and wound architecture were comparable between eyes with a long CCI and eyes with a short CCI in the immediate postoperative periods up to 24 h, suggesting that wound stability is equivalent when the CCI is securely closed with wound hydration.
KeywordsIntraocular pressure Phacoemulsification Long clear corneal incision Short clear corneal incision Wound construction
The authors thank SciTechEdit International (Highlands Ranch, CO, USA) for editorial assistance and Kozi Yonemoto, PhD, (Ryukyu University, Okinawa, Japan) for statistical assistance.
Conflicts of interest
K Hayashi, Grant (Abbott Medical Optics, Alcon, HOYA, Santen Pharmaceutical, Wakamoto); H. Sasaki, Grant (Abbott Medical Optics, Alcon, HOYA, Santen Pharmaceutical, Wakamoto); S. Manabe, Grant (Abbott Medical Optics, Alcon, HOYA, Santen Pharmaceutical, Wakamoto); A. Hirata, Grant (Abbott Medical Optics, Alcon, HOYA, Santen Pharmaceutical, Wakamoto).