Potentiation of femtosecond laser intratissue refractive index shaping (IRIS) in the living cornea with sodium fluorescein.

Purpose: To assess the effectiveness of intratissue refractive index shaping (IRIS) in living corneas and test the hypothesis that it can be enhanced by increasing the two-photon absorption (TPA) of the tissue.

Methods: Three corneas were removed from adult cats and cut into six pieces, which were placed in preservative (Optisol-GS; Bausch & Lomb, Inc., Irvine, CA) containing 0%, 0.

Intratissue refractive index shaping (IRIS) of the cornea and lens using a low-pulse-energy femtosecond laser oscillator.

Purpose: To assess the optical effect of high-repetition-rate, low-energy femtosecond laser pulses on lightly fixed corneas and lenses.

Methods: Eight corneas and eight lenses were extracted postmortem from normal, adult cats. They were lightly fixed and stored in a solution that minimized swelling and opacification.

Photorefractive keratectomy in the cat eye: biological and optical outcomes.

Purpose: To quantify optical and biomechanical properties of the feline cornea before and after photorefractive keratectomy (PRK) and assess the relative contribution of different biological factors to refractive outcome.

Setting: Department of Ophthalmology, University of Rochester, Rochester, New York, USA.

Methods: Adult cats had 6.

Large-dynamic-range Shack-Hartmann wavefront sensor for highly aberrated eyes.

A conventional Shack-Hartmann wavefront sensor has a limitation that increasing the dynamic range usually requires sacrificing measurement sensitivity. The prototype large-dynamic-range Shack-Hartmann wavefront sensor presented resolves this problem by using a translatable plate with subapertures placed in conjugate with the lenslet array. Each subaperture is the same size as a lenslet and they are arranged so that they overlap every other lenslet position.