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Purpose <p>To investigate posture-related intraocular pressure (IOP) fluctuations in eyes following vitrectomy.</p> Methods <p>This study included 54 patients (108 eyes) who had undergone unilateral vitrectomy for rhegmatogenous retinal detachment (RRD), with the fellow eye unaffected. IOP was measured after maintaining each posture for 10&#xa0;min: sitting, supine, lateral decubitus position (LDP) with the healthy eye dependent, LDP with the operated eye dependent, and face-down. A linear mixed model was used to assess the effect of vitrectomy on IOP across different postures.</p> Results <p>Vitrectomized eyes demonstrated significantly higher IOP in the face-down position compared to their healthy contralateral eyes (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:\widehat{{\upbeta\:}}\)</EquationSource> </InlineEquation> = 0.91 mmHg, 95% confidence interval [CI]: 0.26, 1.57; <i>P</i> = 0.013). IOP fluctuations between the sitting and face-down positions were also more pronounced in vitrectomized eyes (<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:\widehat{{\upbeta\:}}\:\)</EquationSource> </InlineEquation>= 4.67%, 95% [CI]: 1.76, 7.58; <i>P</i> = 0.002). Subgroup analysis revealed that these differences were significant only in patients more than 6 months post-vitrectomy; no significant Changes were observed in those within 6 months of surgery. In addition, a longer axial length was independently associated with elevated face-down IOP.</p> Conclusions <p>Vitrectomized eyes are more prone to posture-related IOP elevation, especially in the face-down position and after six months postoperatively. This highlights the need for long-term IOP monitoring in these patients.</p>

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Postural IOP elevation in Face-Down position in vitrectomized eyes: A Time-Related glaucoma risk indicator

  • 期刊论文

  • 发表日期：

    2025年9月24日

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  • Chu-Yen Huang,
  • Xiao Chun Lin,
  • Eugene Yu-Chuan Kang,
  • Yu-Chun Cheng,
  • Po-Han Yeh,
  • Tsung-En Huang,
  • Wei-Chi Wu,
  • Yung-Sung Lee

摘要

Purpose

To investigate posture-related intraocular pressure (IOP) fluctuations in eyes following vitrectomy.

Methods

This study included 54 patients (108 eyes) who had undergone unilateral vitrectomy for rhegmatogenous retinal detachment (RRD), with the fellow eye unaffected. IOP was measured after maintaining each posture for 10 min: sitting, supine, lateral decubitus position (LDP) with the healthy eye dependent, LDP with the operated eye dependent, and face-down. A linear mixed model was used to assess the effect of vitrectomy on IOP across different postures.

Results

Vitrectomized eyes demonstrated significantly higher IOP in the face-down position compared to their healthy contralateral eyes ( \(\:\widehat{{\upbeta\:}}\) = 0.91 mmHg, 95% confidence interval [CI]: 0.26, 1.57; P = 0.013). IOP fluctuations between the sitting and face-down positions were also more pronounced in vitrectomized eyes ( \(\:\widehat{{\upbeta\:}}\:\) = 4.67%, 95% [CI]: 1.76, 7.58; P = 0.002). Subgroup analysis revealed that these differences were significant only in patients more than 6 months post-vitrectomy; no significant Changes were observed in those within 6 months of surgery. In addition, a longer axial length was independently associated with elevated face-down IOP.

Conclusions

Vitrectomized eyes are more prone to posture-related IOP elevation, especially in the face-down position and after six months postoperatively. This highlights the need for long-term IOP monitoring in these patients.