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Immediate changes in intraocular pressure after clear corneal micro-incision versus small-incision cataract surgery

  • Clinical Investigation
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Abstract

Purpose

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.

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Acknowledgments

The authors thank SciTechEdit International (Highlands Ranch, CL, USA) for editorial assistance and Masahiro Toda, PhD (CMIC Co., Ltd, Tokyo, Japan) for statistical assistance.

Conflicts of interest

K. Hayashi, Grants (Alcon Japan, Santen), Speakers bureau fee (Alcon); M. Yoshida, Grants (Alcon Japan, Santen), Speakers bureau fee (Alcon); K. Yoshimura, Grants (Alcon Japan, Santen).

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Authors and Affiliations

  1. Hayashi Eye Hospital, 4-23-35 Hakataekimae, Hakata-Ku, Fukuoka, 812-0011, Japan

    Ken Hayashi, Motoaki Yoshida & Koichi Yoshimura

Authors
  1. Ken Hayashi
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  2. Motoaki Yoshida
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  3. Koichi Yoshimura
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Correspondence to Ken Hayashi.

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Hayashi, K., Yoshida, M. & Yoshimura, K. Immediate changes in intraocular pressure after clear corneal micro-incision versus small-incision cataract surgery. Jpn J Ophthalmol 58, 402–408 (2014). https://doi.org/10.1007/s10384-014-0331-7

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  • DOI: https://doi.org/10.1007/s10384-014-0331-7

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