Treatment of astigmatism during phacoemulsification.

Purpose: To compare the effectiveness of limbal relaxing incisions (LRI) with that of toric intraocular lens (IOL) implantation for the treatment of astigmatism during phacoemulsification using nonvectorial (predictability, safety, and efficacy) and vectorial analyses.

Methods: This longitudinal observational case series assessed 62 eyes of 31 consecutive cataract patients with preoperative corneal astigmatism of 0.75-2.

[Deep lamellar keratectomy using the big-bubble technique in patients with keratoconus].

Purpose: To evaluate patients with keratoconus 12 months after deep anterior lamellar keratectomy using the big-bubble technique.

Methods: A retrospective study of 79 consecutive eyes of 71 patients with moderate to severe keratoconus with visual impairment after optical correction and intolerant to contact lens fitting. All transplants were performed by the same experienced surgeon, from January 2007 to February 2009 using the technique of deep anterior lamellar keratectomy by big-bubble.

Spherical aberration and contrast sensitivity in eyes implanted with aspheric and spherical intraocular lenses: a comparative study.

Purpose: To determine whether implantation of an intraocular lens (IOL) with a modified anterior aspheric surface results in reduced spherical aberration and improved contrast sensitivity after cataract surgery.

Design: Prospective, comparative, interventional case series.

Methods: In an intraindividual randomized prospective study of 25 patients with bilateral cataract, an IOL with a modified anterior surface (Tecnis Z9001; Advanced Medical Optics, Santa Ana, California, USA; group 1) was compared with biconvex lens with spherical surfaces (ClariFlex; Advanced Medical Optics; group 2).

Ocular aberrations and contrast sensitivity after cataract surgery with AcrySof IQ intraocular lens implantation Clinical comparative study.

Purpose: To determine whether implantation of an intraocular lens (IOL) with a modified posterior aspherical surface (AcrySof IQ, Alcon Surgical Laboratories) results in reduced ocular aberrations (spherical aberration) and improved contrast sensitivity after cataract surgery.

Setting: Brasilia Ophthalmologic Hospital, Brasilia, and Sao Geraldo Eye Hospital, Federal University of Minas Gerais, Belo Horizonte, Brazil.

Methods: In an intraindividual randomized prospective study of 25 patients with bilateral cataract, an IOL with a modified posterior surface (AcrySof IQ) was compared with a biconvex IOL with spherical surfaces (AcrySof Natural, Alcon).

The effect of hinge position and depth plate on the rate of recovery of corneal sensation following LASIK.

Purpose: To evaluate and compare the effect of hinge position and flap thickness on recovery rate of corneal sensation after (LASIK).

Design: Prospective, randomized clinical study.

Methods: Forty eyes of 40 patients underwent LASIK to correct myopia ranging from -1.