Laser-Assisted In Situ Keratomileusis in Flat, Normal, and Steep Corneas

Area of Science:

• Ophthalmology
• Refractive Surgery
• Corneal Surgery

Background:

• Corneal curvature is a key factor influencing refractive surgery outcomes.
• Understanding the impact of varying corneal steepness on LASIK results is crucial for patient selection and surgical planning.

Purpose of the Study:

• To compare the outcomes of wavefront-optimized myopic laser-assisted in situ keratomileusis (LASIK) in patients with different corneal curvatures.
• To evaluate the safety and efficacy of LASIK across a range of corneal topographies.

Main Methods:

• A retrospective comparative chart review of patients undergoing wavefront-optimized myopic LASIK.
• Patients were categorized into three groups based on keratometry: flat (<42 D), normal (42-46 D), and steep (>46 D).
• Case-by-case matching ensured baseline similarity in age, preoperative visual acuity, and refractive error between groups.

Main Results:

• No significant differences were observed in safety index, efficacy index, or visual acuity between the flat, normal, and steep cornea groups.
• Proportions of patients achieving target spherical equivalence and astigmatism correction were comparable across all corneal curvature groups.
• Longer-term follow-up in a subset of patients confirmed these consistent outcomes.

Conclusions:

• Wavefront-optimized myopic LASIK demonstrates comparable safety and efficacy regardless of corneal curvature.
• The procedure is a viable and effective option for correcting myopia in patients with flat, normal, and steep corneas.
• Corneal topography, specifically keratometry, does not appear to be a limiting factor for successful LASIK outcomes with this technique.