Capsular Tension Ring Use in High Myopic Eyes Undergoing Cataract Surgery: A Systematic Review and Meta-Analysis.

Area of Science:

• Ophthalmology
• Refractive Surgery
• Cataract Surgery

Background:

• High myopia presents unique challenges in cataract surgery.
• Intraocular lens (IOL) stability and refractive outcomes are critical.
• Capsular tension rings (CTRs) are used to enhance capsular support.

Purpose of the Study:

• To evaluate the impact of capsular tension ring (CTR) implantation.
• Assess effects on refractive outcomes, IOL stability, and complications.
• Focus on high myopic patients undergoing cataract surgery.

Main Methods:

• Systematic review and meta-analysis of 9 studies (4 RCTs, 5 cohort).
• Searched PubMed, EMBASE, Cochrane Library, Google Scholar.
• Analyzed prediction refractive error, absolute refractive error, visual acuity, IOL decentration, ACD, PCO, and Nd:YAG rates.

Main Results:

• CTR did not significantly affect prediction refractive error or corrected distance visual acuity.
• CTR significantly reduced absolute refractive error and IOL decentration.
• No covariates significantly influenced prediction refractive error in meta-regression.

Conclusions:

• CTR implantation may modestly improve refractive predictability and IOL stability in high myopic eyes.
• Findings should be interpreted with caution due to limited evidence and small effect sizes.
• Consider CTR in selected high myopic cases with suspected zonular weakness.