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Related Experiment Video

Updated: Nov 20, 2025

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
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Visual Acuity Outcomes after Phacoemulsification in Eyes with Good Visual Acuity before Cataract Surgery.

Nikolaos Dervenis1, Anna Praidou1, Panagiotis Dervenis2

  • 1Moorfields Eye Hospital, London, United Kingdom.

Medical Principles and Practice : International Journal of the Kuwait University, Health Science Centre
|January 25, 2021
PubMed
Summary

Cataract surgery significantly improves vision, but 8.1% of patients with good pre-op vision don't reach their target. Factors like age and complications impact outcomes.

Keywords:
Clear lens extractionIris traumaVitreous loss

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Area of Science:

  • Ophthalmology
  • Surgical Outcomes
  • Vision Science

Background:

  • Cataract surgery aims to restore vision.
  • Assessing outcomes in patients with pre-existing good visual acuity is crucial for refining surgical targets.
  • Phacoemulsification is a common cataract surgery technique.

Purpose of the Study:

  • To analyze cataract surgery outcomes in eyes with good pre-operative visual acuity.
  • To identify factors associated with suboptimal visual acuity post-surgery.

Main Methods:

  • Retrospective longitudinal study of 2,720 patients undergoing phacoemulsification (2014-2018).
  • Inclusion criteria: age ≥40 years, pinhole visual acuity ≥6/9 pre-operatively.
  • Analysis of pre- and post-operative visual acuities (unaided, with glasses, pinhole).

Main Results:

  • Significant improvements in unaided, corrected, and pinhole visual acuity were observed (p < 0.001).
  • 8.1% of patients achieved post-operative visual acuity below the 6/9 threshold.
  • Increasing age, vitreous loss, and iris trauma were associated with poorer outcomes (p < 0.05).

Conclusions:

  • Cataract surgery yields significant visual improvement, even in patients with good pre-operative vision.
  • The 6/9 threshold may not fully capture the benefits or identify all patients who could benefit from surgery.
  • Age and intraoperative complications like vitreous loss and iris trauma negatively impact visual outcomes.