Changes in refractive error and anterior segment parameters after isolated lateral rectus muscle recession

Area of Science:

• Ophthalmology
• Strabismus Surgery
• Refractive Error

Background:

• Lateral rectus muscle recession is a common surgical procedure for strabismus.
• The impact of this surgery on ocular biometry and refractive status is not fully understood.

Purpose of the Study:

• To assess the immediate effects of isolated lateral rectus muscle recession on refractive error.
• To evaluate changes in corneal parameters and anterior chamber dimensions post-surgery.

Main Methods:

• Prospective study of 24 patients undergoing isolated lateral rectus muscle recession.
• Measurements of refractive error, corneal topography, and anterior chamber dimensions using Pentacam before and at 1 week and 1 month after surgery.
• Statistical analysis using ANOVA to compare pre- and postoperative data.

Main Results:

• Significant short-term changes in spherical equivalent, keratometry, corneal astigmatism, and anterior chamber depth/volume were observed 1 week post-surgery.
• These changes diminished by 1 month, but spherical equivalent alterations remained significant.
• No significant differences were noted in corneal thickness.

Conclusions:

• Isolated lateral rectus muscle recession induces transient changes in refractive error and ocular biometry.
• Potential causes include altered muscle tension, ciliary body circulation changes, or tissue edema.
• Longer-term follow-up is needed to determine the clinical relevance of these findings.