Clear lens extraction with multifocal apodized diffractive intraocular lens implantation.

Purpose: To assess efficacy, safety, predictability, and stability after clear lens extraction (CLE) with multifocal diffractive intraocular lens (IOL) implantation.

Design: Prospective, nonrandomized, masked observational case series (self-controlled).

Participants: Two hundred twenty-four eyes of 112 consecutive patients after CLE with bilateral AcrySof ReSTOR Natural IOL implantation.

Contrast sensitivity after LASIK flap creation with a femtosecond laser and a mechanical microkeratome.

Purpose: To compare the effects on contrast sensitivity of the IntraLase femtosecond laser for flap creation (IntraLASIK) and standard LASIK for myopia.

Methods: Two hundred eyes of 100 consecutive patients underwent LASIK treatment using the VISX S2 laser system. The femtosecond laser (15 kHz IntraLase) was used for flap creation in 100 eyes (50 patients) and a mechanical microkeratome (Carriazo-Barraquer) was used in 100 eyes (50 patients).

Asphericity of the anterior human cornea with different corneal diameters.

Purpose: To measure the anterior corneal asphericity (Q) with different corneal diameters.

Setting: Department of Physics (Optometry), University of Minho, Braga, Portugal.

Methods: Thirty-six eyes of 36 patients were evaluated using a videokeratoscope, and the Q-values were recorded.

Correlation of pupil size with visual acuity and contrast sensitivity after implantation of an apodized diffractive intraocular lens.

Purpose: To determine whether pupil size is correlated with visual acuity and contrast sensitivity at all distances in eyes with an apodized diffractive intraocular lens (IOL).

Setting: Private Clinic, Oviedo, Spain.

Methods: Six months after surgery, the best corrected distance visual acuity, best distance-corrected near visual acuity, intermediate visual acuity, and distance contrast sensitivity under photopic (85 cd/m2) and mesopic (5 cd/m2) conditions were measured in 670 eyes of 335 consecutive patients who had implantation of the AcrySof ReSTOR Natural IOL (SN60D3, Alcon).

Quality of vision with the Acri. Twin asymmetric diffractive bifocal intraocular lens system.

Purpose: To assess the quality of vision in patients who had implantation of asymmetric Acri. Twin bifocal diffractive intraocular lenses (IOLs) by evaluating distance and near visual acuities and photopic and mesopic contrast sensitivity under monocular and binocular conditions.

Setting: Fernández-Vega Ophthalmological Institute, Oviedo, Spain.

Femtosecond laser versus mechanical keratome LASIK for myopia.

Objective: To assess efficacy, safety, predictability, stability, and changes in corneal higher-order aberrations (CHOAs) and contrast sensitivity (CS) after a femtosecond laser for LASIK and standard LASIK for myopia.

Design: Prospective, randomized, comparative clinical study.

Participants: Two hundred eyes of 100 consecutive patients who underwent LASIK treatment using the VISX S2 laser system.

Age differences in central and peripheral intraocular pressure using a rebound tonometer.

Aim: To evaluate the influence of age on the measurements and relationships among central and peripheral intraocular pressure (IOP) readings taken with a rebound tonometer.

Methods: The IOPs were measured using the ICare rebound tonometer on the right eyes of 217 patients (88 men and 129 women) aged 18-85 years (mean 45.9 (SD 19.

Spherical aberration and contrast sensitivity after cataract surgery with the Tecnis Z9000 intraocular lens.

Purpose: To determine whether implantation of an intraocular lens (IOL) with a modified prolate anterior surface (Tecnis Z9000, AMO) results in reduced spherical aberration and improved contrast sensitivity after cataract surgery.

Setting: Hospital NISA Virgen del Consuelo, Valencia, Spain.

Methods: In an intraindividual randomized prospective study of 30 patients with bilateral cataract, the Tecnis Z9000 IOL was compared with 2 IOLs with spherical surfaces, the AR40e (AMO) and the Stabibag (Ioltech).

Corneal aberration changes after hyperopic LASIK: a comparison between the VISX Star S2 and the Asclepion-Meditec MEL 70 G Scan excimer lasers.

Purpose: To compute and compare anterior corneal aberration changes following hyperopic LASIK using two different excimer lasers: the VISX Star S2 and the Asclepion-Meditec MEL 70 G Scan.

Methods: The right eyes of 43 patients with preoperative refraction ranging from +0.75 to +5.

Blue-light filtering intraocular lens in patients with diabetes: contrast sensitivity and chromatic discrimination.

Purpose: To evaluate potential changes in contrast sensitivity and color discrimination in diabetic patients who had cataract surgery and implantation of the blue-light filtering AcrySof Natural (SN60AT) intraocular lens (IOL) compared with an ultraviolet-only filtering (AcrySof SA60AT) IOL.

Setting: Refractive Surgery Unit, Hospital NISA Valencia al Mar, Valencia, Spain.

Methods: Forty-four eyes of 22 diabetic patients were enrolled in a blue-light filtering fellow-eye control study.

Wavefront-guided versus standard LASIK enhancement for residual refractive errors.

Objective: To assess efficacy, safety, predictability, stability, and changes in higher-order aberrations (HOAs) and contrast sensitivity (CS) after wavefront-guided and standard LASIK enhancement for the correction of residual refractive errors.

Design: Prospective, randomized, comparative clinical study.

Participants: Twenty eyes of 20 consecutive patients (spherical equivalent [SE], -2.

Postblink changes in the ocular modulation transfer function measured by a double-pass method.

Purpose: To examine the temporal changes in the modulation transfer function (MTF) of the eye after a blink.

Methods: The distance MTF of a 5-mm pupil was derived from double-pass retinal images in 20 healthy young subjects at various intervals after a blink (1 second up to 15 seconds). Such measurements include the effects of wavefront aberration, scattered light, and errors in focus and are thus more relevant to real life than are estimates of MTF based on wavefront errors alone.

Antibacterial and antifungal effects of soft contact lens disinfection solutions.

Aims: To study the antibacterial and antifungal effects of soft contact lens disinfection solutions.

Methods: Eight contact lens disinfection solutions containing hydrogen peroxide or biguanides or polyquad compounds were evaluated with respect to their ability to disinfect a saline solution experimentally contaminated with different bacteria and with a fungus. We used cultures in blood Agar, MuellerHinton agar and Saboureaud's agar to identify the bacterial and fungal growth following 14 h of exposure to the disinfection solutions.

A simple technique for measurement of corneal thickness.

Measurement of corneal thickness has potential benefit both in the fitting of contact lenses and in monitoring any pathology that could affect corneal thickness. Corneal thickness measurement is undertaken using an accessory to the biomicroscope, the optical pachometer, or by means of expensive apparatus such as the ultrasonic pachometer. There are other complex methods, such as laser Doppler interferometry, or ultrasonic rasters of the cornea.

Crystalline lens optical dysfunction through aging.

Purpose: To evaluate the optical and densitometric changes that take place in the crystalline lens with aging.

Design: Cross-sectional study.

Participants: Seventy-two eyes of 72 patients of different ages (8-80 years) with a clear lens, a visual acuity of 20/25 or better, and no ocular disease.

Retinal image quality after microincision intraocular lens implantation.

Purpose: To evaluate the modulation-transfer function (MTF) in eyes implanted with a conventional intraocular lens (IOL) and 2 IOLs designed for microincision cataract surgery (MICS).

Setting: Research, Development, and Innovation Department, Instituto Oftalmológico de Alicante, Alicante, Spain.

Methods: This prospective nonrandomized consecutive series comprised 30 eyes implanted with 1 of the following IOLs: conventional acrylic foldable (AcrySof MA60BM, Alcon Laboratories) or the UltraChoice 1.

Intracorneal hydrogel lenses and corneal aberrations.

Purpose: To investigate the optical performance of the cornea based on corneal aberrometry following intracorneal hydrogel lens implantation.

Methods: A retrospective, nonconsecutive, observational study of the anterior corneal surface aberration profile of four hyperopic eyes previously implanted with an intracorneal hydrogel lens were studied by videokeratographic elevation maps before and 6 months after surgery.

Results: Intracorneal hydrogel lenses reduced the optical performance in all four eyes by increasing the spherical aberrations by a mean factor of 1.

Dynamic changes in the tear film in dry eyes.

Purpose: To examine the dynamics of the tear film in patients with dry eye by measuring the wavefront aberrations of the anterior surface of the film.

Methods: Anterior surface aberrations for a 7-mm pupil were determined in 13 patients with dry eye at 1-second time intervals, for 15 seconds after a blink. The aberrations were calculated from the elevations provided by corneal topography.

Keratectasia after bilateral laser in situ keratomileusis in a patient with previous radial and astigmatic keratotomy.

We describe a case of bilateral keratectasia after laser in situ keratomileusis (LASIK) in a patient with previous radial keratotomy and astigmatic keratotomy. The best spectacle-corrected visual acuity (BSCVA) was 20/25 in both eyes. After uneventful LASIK was performed in both eyes for low myopic astigmatism, the patient presented with progressive myopia and astigmatism and a BSCVA of 20/50 in both eyes.

Artisan iris-claw phakic intraocular lens followed by laser in situ keratomileusis for high hyperopia.

Purpose: To evaluate safety, efficacy, predictability, stability, complications, and patient satisfaction after Artisan phakic intraocular lens (IOL) implantation followed by laser in situ keratomileusis (LASIK) for the correction of high hyperopia.

Setting: Instituto Oftalmólogico de Alicante, Alicante, Spain.

Methods: This prospective trial included 39 eyes with a mean preoperative spherical equivalent (SE) of 7.

Changes in ocular aberrations after instillation of artificial tears in dry-eye patients.

Purpose: To study the effect of artificial tear instillation on ocular aberrations in dry-eye patients.

Setting: Research, Development and Innovation Department, Instituto Oftalmológico de Alicante, Alicante, Spain.

Methods: Ocular aberrations (total, spherical-like, and coma-like) were measured with a Hartmann-Shack aberrometer before and after artificial tear instillation (immediately and 10 minutes later) in 15 eyes of 15 dry-eye patients.

Bitoric laser in situ keratomileusis for astigmatism.

Purpose: To evaluate the efficacy, predictability, and safety of bitoric laser in situ keratomileusis (LASIK) for the correction of mixed astigmatism.

Setting: Instituto Oftalmológico de Alicante, Alicante, Spain.

Methods: This prospective study included 28 eyes of 21 patients with mixed astigmatism who had bitoric LASIK using the Hansatome microkeratome (Bausch & Lomb Surgical) and the Chiron Technolas 217 excimer laser (Bausch & Lomb Surgical).