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

Area of Science:

• Ophthalmology
• Retinal Surgery

Background:

• Vitrectomy is a common surgical procedure for retinal detachment.
• Intraocular pressure (IOP) can be influenced by patient posture.
• Understanding posture-related IOP changes after vitrectomy is crucial for patient management.

Purpose of the Study:

• To investigate how different body postures affect intraocular pressure (IOP) in eyes that have undergone vitrectomy.
• To compare IOP fluctuations in vitrectomized eyes versus healthy fellow eyes across various positions.

Main Methods:

• The study involved 54 patients (108 eyes) who had unilateral vitrectomy for rhegmatogenous retinal detachment (RRD).
• IOP was measured in sitting, supine, lateral decubitus, and face-down positions after 10 minutes in each posture.
• A linear mixed model analyzed the effect of vitrectomy on IOP across postures.

Main Results:

• Vitrectomized eyes exhibited significantly higher IOP in the face-down position compared to contralateral healthy eyes (P=0.013).
• Greater IOP fluctuations between sitting and face-down positions were observed in vitrectomized eyes (P=0.002).
• These effects were significant only in patients over six months post-vitrectomy; longer axial length correlated with higher face-down IOP.

Conclusions:

• Eyes following vitrectomy are more susceptible to posture-related IOP elevation, especially when face-down and more than six months post-surgery.
• The findings underscore the importance of ongoing IOP monitoring in patients after vitrectomy.
• Posture significantly impacts IOP in vitrectomized eyes, necessitating clinical consideration.