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Related Experiment Video

Updated: Jul 12, 2025

Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
05:46

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Posterior keratometry changes after steep axis phacoemulsification: a prospective study.

Jaya Kaushik1, Ankita Singh2, Sunandan Bhatta3

  • 1Department of Ophthalmology, Command Hospital (Lucknow), U.P, India.

Romanian Journal of Ophthalmology
|October 25, 2023
PubMed
Summary
This summary is machine-generated.

Phacoemulsification surgery significantly alters posterior corneal curvature, impacting surgically induced astigmatism. Posterior keratometry is crucial for accurate refractive cataract surgery planning.

Keywords:
Scheimpflug imagingastigmatismkeratometryphacoemulsificationsteep axis

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Area of Science:

  • Ophthalmology
  • Corneal Surgery
  • Refractive Surgery

Background:

  • Phacoemulsification is a common cataract surgery technique.
  • Astigmatism can affect visual outcomes after cataract surgery.
  • The role of posterior corneal changes in astigmatism is not fully understood.

Purpose of the Study:

  • To measure posterior corneal curvature changes after steep axis phacoemulsification.
  • To investigate the impact of these changes on surgically induced astigmatism (SIA).

Main Methods:

  • Prospective longitudinal study of 60 cataract patients.
  • Preoperative and 4-week postoperative corneal topography using Scheimpflug imaging.
  • Assessment of anterior and posterior corneal curvature at 3, 5, and 7 mm diameters.

Main Results:

  • Statistically significant changes in posterior corneal K1, K2, and mean astigmatism were observed in all zones.
  • These changes were evident at 4 weeks postoperative compared to preoperative measurements.

Conclusions:

  • Posterior corneal curvature significantly changes after phacoemulsification.
  • Posterior keratometry is a key factor in determining SIA.
  • Incorporating posterior corneal data is essential for refractive cataract surgery.