Rate of fractional change in corneal tomography parameters in keratoconus using a combination of predictive parameters.

ABSTRACT:

Background

To compare the rate of fractional change for multiple corneal tomographic factors in progressive keratoconus (KC).

Methods

In this retrospective case series, 40 eyes (40 patients) with progressive KC (increase in central keratometry of 1.00 D or maximum keratometry of 1.50 D on two visits at least six months apart) were included. Cases with previous history of ocular surgery, poor scans, corneal scars, severe dry eyes, post-excimer ectasia, pellucid marginal degeneration were excluded. Medical records, corneal tomography and anterior corneal wavefront (8 mm) (Scheimpflug tomography, Pentacam, Oculus, Germany) were analyzed. Rate of fractional change (Rx = (x₁ - x₀)/(|x₀|t_m)); where, x₁ = value at follow-up, x<

SUBMITTER: Prakash G 

PROVIDER: S-EPMC10544119 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature