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<p>To assess intraocular pressure (IOP) changes and the development of ocular hypertension (OH) following pars plana vitrectomy (PPV), evaluating short- and long-term outcomes and risk factors. This is a retrospective study of 216 patients (432 eyes) who underwent primary unilateral PPV between April 2018 and July 2020, with ≥ 12 months of follow-up. IOP in vitrectomized and fellow eyes was analyzed preoperatively, at 3 months, and at final visit. OH was defined as the need for IOP-lowering medication; IOP was also analyzed as a continuous variable. Baseline and intraoperative factors were evaluated using cohort and matched case–control designs. Median follow-up was 28 months. Early and late OH occurred in 28.2% and 15.3% of vitrectomized eyes. Retinal detachment (RD) increased the risk of early OH fourfold (OR 4.16; <i>p</i> &lt; 0.001). Higher preoperative IOP in the fellow eye predicted both early (OR 1.17; <i>p</i> = 0.003) and late OH (OR 1.18; <i>p</i> = 0.007). Postoperatively, vitrectomized eyes had higher IOP at all timepoints. Glaucoma developed in 6.5% of vitrectomized vs. 1.4% of fellow eyes (<i>p</i> = 0.008). PPV is associated with sustained IOP elevation and increased OH risk. RD and fellow eye IOP are relevant predictors. Long-term monitoring is essential to prevent glaucoma, especially in high-risk patients.</p>

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Effect of pars plana vitrectomy on early and long-term intraocular pressure and its determinants

  • 期刊论文

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  • 发表日期：

    2025年8月6日

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  • Ana Faria Pereira,
  • Pedro Marques-Couto,
  • Rita Teixeira-Martins,
  • Amândio Rocha-Sousa,
  • Pedro Alves-Faria,
  • Joana R. Araújo

摘要

To assess intraocular pressure (IOP) changes and the development of ocular hypertension (OH) following pars plana vitrectomy (PPV), evaluating short- and long-term outcomes and risk factors. This is a retrospective study of 216 patients (432 eyes) who underwent primary unilateral PPV between April 2018 and July 2020, with ≥ 12 months of follow-up. IOP in vitrectomized and fellow eyes was analyzed preoperatively, at 3 months, and at final visit. OH was defined as the need for IOP-lowering medication; IOP was also analyzed as a continuous variable. Baseline and intraoperative factors were evaluated using cohort and matched case–control designs. Median follow-up was 28 months. Early and late OH occurred in 28.2% and 15.3% of vitrectomized eyes. Retinal detachment (RD) increased the risk of early OH fourfold (OR 4.16; p < 0.001). Higher preoperative IOP in the fellow eye predicted both early (OR 1.17; p = 0.003) and late OH (OR 1.18; p = 0.007). Postoperatively, vitrectomized eyes had higher IOP at all timepoints. Glaucoma developed in 6.5% of vitrectomized vs. 1.4% of fellow eyes (p = 0.008). PPV is associated with sustained IOP elevation and increased OH risk. RD and fellow eye IOP are relevant predictors. Long-term monitoring is essential to prevent glaucoma, especially in high-risk patients.