Changes in refraction after cataract phacoemulsification surgery

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.