Wavefront-optimized surface retreatments of refractive error following previous laser refractive surgery: a retrospective study

Wavefront-optimized surface retreatments of refractive error following previous laser refractive surgery: a retrospective study.

BACKGROUND Retreatments are sometimes necessary to correct residual or induced refractive errors following refractive surgery. Many different combinations of primary treatment methods and retreatment techniques have been studied, however, few studies have investigated wavefront-optimized (WFO) technology for retreatment following primary refractive surgery. This study aimed to report the outcom...

infectious keratitis following excimer laser refractive surgery

infectious keratitis occurs rarely after laser refractive surgery, however the high volume of these procedures and young patient age render the prevention, diagnosis and treatment of this complication of utmost importance. early onset infectious keratitis is usually caused by gram positive bacteria while late onset cases are due to other microorganisms such as atypical mycobacteria, nocardia as...

Refractive error sensing from wavefront slopes.

The problem of measuring the objective refractive error with an aberrometer has shown to be more elusive than expected. Here, the formalism of differential geometry is applied to develop a theoretical framework of refractive error sensing. At each point of the pupil, the local refractive error is given by the wavefront curvature, which is a 2 × 2 symmetric matrix, whose elements are directly re...

Experimental evaluation of optimized ablation patterns for laser refractive surgery.

A new experimental model based on plastic (Filofocon A) artificial eyes was used to study the ablation profiles and the outcomes of three state-of-the-art refractive surgery excimer lasers provided with narrow-beam flying spot and optimized algorithms (Ladarvision 4000, Alcon; Technolas 217 Z100, Bausch and Lomb; Allegretto wave Eye-Q, Wavelight). The 3-D ablation patterns produced by myopic la...

Laser refractive eye surgery.