Introduction

Keratoconus (KC) is a non-inflammatory, usually progressive disease with unknown aetiology. It leads to thinning and bulging of the cornea and consequently produces irregular astigmatism and high myopia. Evidence demonstrates that keratoconic corneas are more mechanically compliant than normal corneas, as measured in vivo with the ocular response analyser (ORA).1 2 A biomechanical explanation of KC aetiology has been …