Changes of corneal higher-order aberrations after cataract surgery

Area of Science:

• Ophthalmology
• Corneal Physiology
• Surgical Outcomes

Background:

• Cataract surgery can induce changes in corneal aberrations.
• Understanding these changes and their influencing factors is crucial for optimizing visual outcomes.
• The impact of corneal incision location on post-operative aberrations requires further investigation.

Purpose of the Study:

• To track time-dependent alterations in corneal aberrations following cataract surgery.
• To assess how different corneal incision locations influence these post-operative aberrations.

Main Methods:

• Patients were divided into two groups based on corneal and paracentesis incision sites.
• Corneal high-order aberrations were measured pre-operatively and at multiple time points up to two months post-surgery.
• Modulation transfer function and Strehl ratio were evaluated to assess visual function.

Main Results:

• Corneal aberrations, particularly on the posterior surface, increased significantly one day post-surgery but returned to baseline by two months.
• Changes in horizontal coma differed between the two incision groups.
• Posterior corneal surface aberrations and horizontal coma showed statistically significant differences between groups, but visual function measures (MTF, Strehl ratio) did not.

Conclusions:

• Post-cataract surgery corneal aberration changes are predominantly on the posterior surface.
• Corneal incision placement influences aberration dynamics but does not significantly impact long-term visual quality.