The Relationship between Visual Acuity, Refraction and Pachymetry Values, and Topographic Keratoconus Screening Classification

Abstract

Objective: To evaluate the relationship between visual acuity, refractive and pachymetric parameters, and topographic keratoconus screening classification (KCSC) in patients with- out a known diagnosis of keratoconus (KC). Methods: This retrospective study included 366 eyes of 183 patients for whom topography examination was performed due to clinical suspicion of KC. Visual acuity, refractive and pa- chymetry parameters, and KCSC result (normal, suspect KC, or KC compatible) according to Sirius topography (CSO, Firenze, Italy) were noted retrospectively. The eyes were divided into 4 groups based on the magnitude of astigmatism ( -4 D) and the relationship between these groups and topographic KCSC was evaluated. Results: BCVA was higher in the suspect KC group than in the normal group (p=0.008) and lower in the KC compatible group compared to the normal and suspect KC groups (p=0.015, p