Abstract

DIAZ RODRIGUEZ, Magela Elfa et al. Diagnosis of the subclinical keratoconus through elevation topography. Rev Cubana Oftalmol [online]. 2014, vol.27, n.1, pp.29-37. ISSN 0864-2176.

Objective: to define the most effective parameters of corneal elevation topography for subclinical keratoconus screening. Methods: Galilei topography system-based study included corneas from 15 patients with clinical diagnosis of keratoconus (group 1, n = 23 eyes), from 12 patients with subclinical keratoconus (group 2, n = 18 eyes) and a control group of 13 myopic subjects paired in gender, age and refractive spherical equivalent (group 3, n = 25). The following parameters were analyzed: location of the apex, anterior and posterior corneal elevation, minimal pachyimetry and anterior chamber depth. Results: the most frequent location of the apex was at the inferotemporal sector (52 %). Mean anterior maximum elevation was 40,83 ± 17,75 mm in group 1 and 16,89 ± 8,22 mm in group 2; these results were significantly different from the control group (p < 0,02). Mean posterior maximum elevation was 73,35 ± 17,73 mm in group 1 and 41,22 ± 9,94 mm in group 2, both showing a statistically significant difference from that of the control group (p < 0,00). Minimal corneal thickness and anterior chamber depth also showed statistically significant differences among the three groups. Conclusions: statistically significant differences were found in anterior and posterior elevation, minimal corneal thickness and anterior chamber depth parameters, as measured by the Galilei system, between the normal myopic subjects, and those with clinical and subclinical keratoconus.

Keywords : keratoconus; corneal topography; Galilei.

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