Proportion and clinical characteristics of keratoconus among patients attending refraction units: a retrospective facility-based study in Malawi.

Of the 1,400 targeted records, 1,180 (84.3%) were successfully retrieved.

KC was most common among individuals aged 18-35 years (p = 0.001) and varied significantly by facility and region (p < 0.005).

Significant inter-eye differences were observed for best-corrected visual acuity and astigmatic axis (p < 0.005), but not for keratometric measurements.

Median visual acuity improved from 0.2 to 0.6 following refractive correction.