Corneal Collagen Cross-linking in Advanced Keratoconus: A 4-Year Follow-up Study.

Purpose: To analyze the safety and efficacy of standard corneal collagen cross-linking (CXL) in advanced cases of progressive keratoconus after 4 years of follow-up.

Methods: A retrospective case series of patients with advanced progressive keratoconus (stages 3 and 4 of Amsler-Krumeich classification) underwent standard CXL treatment. The parameters examined were changes in uncorrected visual acuity (UDVA), corrected visual acuity (CDVA), keratometry values (mean, flat, steep, and apical), pachymetry, and endothelial cell count at the baseline and at 12, 24, and 48 months postoperatively.

Ocular risk management in patients undergoing general anesthesia: an analysis of 39,431 surgeries.

Objective: This study sought to describe and analyze ocular findings associated with nonocular surgery in patients who underwent general anesthesia.

Methods: The authors retrospectively collected a series of 39,431 surgeries using standardized data forms.

Results: Ocular findings were reported in 9 cases (2.

Influence of aspheric intraocular lens on frequency doubling technology and contrast sensitivity: a fellow eye study.

Purpose: To evaluate whether implantation of an aspheric intraocular lens (IOL) results in reduced ocular aberrations and improved contrast sensitivity after cataract surgery and, therefore, changes on frequency-doubling technology (FDT) testing.

Methods: The present prospective clinical study enrolled 25 patients with bilateral cataract (50 eyes), who randomly received either an aspheric (Akreos AO) or a spherical (Akreos Fit) IOL in one eye and the other IOL in the second eye. Assessment 12 months postoperatively included photopic and mesopic contrast sensitivity testing.

[Brazilian trends in refractive surgery].

Purpose: To determine preferences and practices of refractive surgeons in Brazil.

Methods: A cross-sectional study was conducted based on the data collected from a questionnaire applied during the VI Brazilian Congress of Cataract and Refractive Surgery and by e-mail sent to all members of that society. Refractive surgery techniques, use of emerging technologies, surgical volume, type of excimer laser and microkeratomes, mitomycin C, postoperative medications were analyzed among others questions.

[Cancellation of cataract surgery in a public hospital].

Purpose: To report the incidence and causes of cataract surgery cancellations in a public hospital.

Methods: This is a retrospective study, which examined the number of cancellations of cataract surgery during 2009. We analyzed the type of procedure suspended (phacoemulsification or extracapsular extraction), type of anesthesia, gender, age, covenant (public/private) and the main reasons for suspension of the surgeries (clinical causes, institutional or personal).

Effect of aspherical and yellow tinted intraocular lens on blue-on-yellow perimetry.

Purpose: To investigate the possible effect of aspherical or yellow tinted intraocular lens (IOL) on contrast sensitivity and blue-on-yellow perimetry.

Methods: This prospective randomized bilateral double-masked clinical study included 52 patients with visually significant bilateral cataracts divided in two groups; 25 patients (50 eyes) received aspherical intraocular lens in one eye and spherical intraocular lens in the fellow eye; and 27 patients (54 eyes) received ultraviolet and blue light filter (yellow tinted) IOL implantation in one eye and acrylic ultraviolet filter IOL in the fellow eye. The primary outcome measures were contrast sensitivity and blue-on-yellow perimetry values (mean deviation [MD] and pattern standard deviation [PSD]) investigated two years after surgery.

A clinical comparison between DisCoVisc and 2% hydroxypropylmethylcellulose in phacoemulsification: a fellow eye study.

Objective: This study sought to compare the effects and outcomes of two ophthalmic viscosurgical devices, 1.6% hyaluronic acid/4.0% chondroitin sulfate and 2.

[Difficulties in access to treatment for patients undergoing cataract surgery in public and private health systems].

Purpose: To identify the difficulties in access to diagnosis and treatment of cataract in patients attended during a cataract campaign.

Methods: A questionnaire was administered to patients selected for cataract surgery. We evaluated, among others, the following variables: prior access to ophthalmologists (public or private), reason(s) for not having surgery early in the initial service, the average cost charged by cataract surgery and intraocular lens (IOL) (private services and agreements).

Effects of blue light-filtering intraocular lenses on the macula, contrast sensitivity, and color vision after a long-term follow-up.

Purpose: To evaluate the possible side effects and potential protection 5 years after implantation of an intraocular lens (IOL) with a blue-light filter (yellow tinted).

Setting: Ophthalmology Department, University of São Paulo, São Paulo, Brazil.

Design: Prospective randomized clinical study.

Visual performance of an apodized diffractive multifocal intraocular lens with +3.00-d addition: 1-year follow-up.

Purpose: To determine whether implantation of a multifocal intraocular lens (IOL) with a lower addition (+3.00 diopters [D]) at the lens plane results in better intermediate visual acuity 1 year after surgery compared with a multifocal IOL with higher addition (+4.00 D).

[Evolution and viability of an outpatient surgery center for cataract surgery on a large scale in a university hospital].

Purpose: To analyze the number of surgeries performed in outpatient surgical center at a university hospital and to assess its financial viability during and after the interruption of the Cataract National Campaign in 2006.

Methods: Retrospective analytical study between 2005 and 2009 at the Clinical Hospital of the University of São Paulo (HC-FMUSP) which evaluated the economic viability of the outpatient surgical center, the number of cataract surgeries performed and the number of surgeons present daily in that unit.

Results: It would be necessary to perform at least 400 procedures monthly to ensure the financial viability of the outpatient surgical center.

[Influence of cataract surgical correction on working perception].

Purpose: To analyze the benefits after cataract surgery in professional activities.

Methods: A prospective, randomized study was conducted at the Clinical Hospital of the University of São Paulo. The patients had cataract surgery by phacoemulsification (PHACO) and by extracapsular extraction (EECP).

Comparison of reading performance after bilateral implantation of multifocal intraocular lenses with +3.00 or +4.00 diopter addition.

Purpose: To compare reading ability after cataract surgery and bilateral implantation of multifocal intraocular lenses (IOLs) with a +3.00 diopter (D) addition (add) or a +4.00 D add.

Social costs of two cataract surgical techniques in Brazil.

Objective: To compare postoperative social costs of two cataract surgical techniques, phacoemulsification (PHACO) and extracapsular extraction (ECCE).

Methods: Prospective randomized intervention study including 205 patients, of which 101 underwent PHACO and 104 ECCE in the public service, in the city of São Paulo, Southeastern Brazil, in 2002. The socioeconomic impact of these surgical procedures was assessed based on postoperative costs for patients, employers and social security.

Phacoemulsification versus extracapsular extraction: governmental costs.

Purpose: To evaluate the governmental costs of patients undergoing phacoemulsification and extracapsular cataract extraction at a public hospital in a developing country.

Methods: A prospective study was conduced with 205 patients. The subjects were randomized for cataract surgery using either phacoemulsification or extracapsular cataract extraction techniques.

Cataract prevalence in Central-West region of São Paulo State, Brazil.

Purpose: Cataract is considered the main preventable cause of blindness and visual impairment mainly in poor countries. This study was done to evaluate if cataract is still an important cause of blindness in Central-West region of State of São Paulo, Brazil.

Methods: A cross-sectional study was conducted with a systematically randomized sample of households in five cities located in Central-West region of São Paulo State, Brazil.

[The knowledge of medical students about cornea donation].

Purpose: To compare knowledge of medical students about the cornea donation process among those who already studied Ophthalmology and the others. METHODOS: A questionnaire containing data as: age, sex, graduation year, and 10 multiple-choice questions about the subject was applied to medical students from the interior of São Paulo state, Brazil. The questions were: age for donation, contraindication for transplants, the time limit to remove the cornea, among others.

[Lack of basic ophthalmic information about ocular emergencies among non-ophthalmologists].

Purpose: To evaluate the level of ophthalmic information and the proper procedures in ophthalmic emergencies among non- ophthalmologists in charge of the emergency departments of General Hospitals.

Methods: A questionnaire containing personal data and other information was sent to the medical personnel in charge of emergencies of several general hospitals in Sorocaba (São Paulo) and region. Questions about the diagnosis and management of ocular emergencies were also sent.