ABSTRACT Objective: To compare visual acuity, corneal tomography, and ocular biometry between regular and irregular astigmatism in Iraqi refractive surgery candidates and to examine relationships among key parameters. Methods: Retrospective cross-sectional study of consecutive adults screened for refractive surgery at Ameer Moumnean Surgery Hospital (Al-Najaf, Iraq) between January and March 2026. Astigmatism was classified as regular (with-the-rule, against-the-rule, or oblique) or irregular based on tomographic/curvature-pattern assessment. Outcomes included uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA) in logMAR, spherical […]