Central Corneal Regularisation Of Keratoconic Corneas Using Topographically Guided Ablation

To demonstrate the ability of central corneal laser regularisation using a topographically guided ablation in keratoconic corneas to safely provide improved best corrected visual acuity.

Private practice ophthalmology and laser clinic at Ashford Advanced Eye Care in Adelaide, Australia.

Twelve eyes with varying degrees of keratoconus and pellucid marginal degeneration spectrum of ectasia underwent topographically guided central corneal regularisation aimed at minimising tissue ablation by optimising a very small optical zone with a wide transition zone using topography, planning software and excimer laser from Ivis (Italy). Improvement in best corrected and unaided visual acuity was recorded as well as any complications.

All twelve eyes showed significant improvements in best corrected visual acuity with an average of four line gain on Snellen vision charts. Unaided visual acuity showed overall improvement but greater variability due to changes in refractive error. No complications occurred, specifically no ectasia progression and no need for rescue crosslinking. 

Central corneal regularisation of keratoconic corneas using the Ivis topographically guided laser system safely and effectively provided significantly improved best corrected visual acuity without complications. This treatment modality should be considered for stable, keratoconic eyes with good visual potential.