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Related Experiment Video

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Changes in refraction after cataract phacoemulsification surgery.

Natalie Si-Yi Lee1, Keith Ong2,3,4,5

  • 1Faculty of Medicine, University of New South Wales, Sydney, Australia. n.s.lee@unsw.edu.au.

International Ophthalmology
|October 12, 2022
PubMed
Summary

Most patients experience refractive shifts after cataract surgery, with hyperopic shifts being most common over three years. Patients should be informed about potential long-term refractive changes following surgery.

Keywords:
Cataract surgeryPhacoemulsificationRefraction

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Area of Science:

  • Ophthalmology
  • Refractive Surgery
  • Biomedical Optics

Background:

  • Cataract surgery, specifically phacoemulsification, can alter refractive outcomes.
  • Previous studies focused on immediate post-operative refraction, neglecting long-term changes.
  • Understanding long-term refractive trends is crucial for patient management and surgical planning.

Purpose of the Study:

  • To investigate the timeline of refractive changes after cataract surgery over a 3-year period.
  • To analyze the evolution of spherical equivalent refraction (SER) and associated ocular parameters post-surgery.

Main Methods:

  • Retrospective observational study of 344 eyes from 204 patients.
  • Measurements included keratometry, anterior chamber depth (ACD), central corneal thickness (CCT), and axial length.
  • Data collected at baseline and post-operatively at 1 month, 1, 2, and 3 years.

Main Results:

  • A hypermetropic shift was observed in 45.2% of eyes (0.35±0.22 D) and a myopic shift in 33.6% (0.32±0.21 D) between 1 month and 3 years.
  • No significant SER change occurred in 21.2% of eyes over the 3-year period.
  • Significant changes in ACD and CCT were noted within the first year post-surgery.

Conclusions:

  • Hypermetropic shift is the predominant refractive change observed 3 years after cataract surgery.
  • Consideration of a more myopic post-operative target may be beneficial.
  • Patients require counseling regarding the potential for refractive alterations post-cataract surgery.