Corneal Collagen Crosslinking for Ectasia After Refractive Surgery: A Systematic Review and Meta-Analysis.

Introduction: Corneal ectasia leads to progressive irregular corneal curvature and reduced visual acuity.

Objective: To assess the safety and effectiveness of corneal collagen cross-linking (CXL) for managing corneal ectasia resulting from refractive laser surgery (RSL).

Methods: A systematic review and meta-analysis were realized according to PRISMA guidelines.

Ocular biomechanical metrics by CorVis ST in healthy Brazilian patients.

Purpose: To evaluate ocular biomechanical metrics given by the CorVis ST (Oculus, Inc., Berlin, Germany) in a population of healthy Brazilian patients.

Methods: An observational and cross-sectional study involving 1 eye randomly selected from 90 healthy patients.

Effects of age on corneal deformation by non-contact tonometry integrated with an ultra-high-speed (UHS) Scheimpflug camera.

Purpose: To correlate parameters derived from corneal deformation resulting from non-contact tonometry integrated with an ultra-high-speed (UHS) Scheimpflug camera (Oculus Corvis ST, Scheimpflug Technology; Wetzlar, Germany) with age in normal eyes from young patients.

Methods: Observational, retrospective study involving one eye randomly selected from study participants, totaling 89 healthy eyes. The Scheimpflug images were taken with an ultra-high-speed camera during each measurement by the corvis ST.

ORA waveform-derived biomechanical parameters to distinguish normal from keratoconic eyes.

Purpose: To evaluate the ability of the Ocular Response Analyzer (ORA; Reichert Ophthalmic Instruments, Buffalo, NY) to distinguish between normal and keratoconic eyes, by comparing pressure and waveform signal-derived parameters.

Methods: This retrospective comparative case series study included 112 patients with normal corneas and 41 patients with bilateral keratoconic eyes. One eye from each subject was randomly selected for analysis.

Intraocular lens power calculation by measuring axial length with partial optical coherence and ultrasonic biometry.

Purpose: To compare the achieved refractive outcomes of patients undergoing cataract surgery with intraocular lens (IOL) power calculation performed by conventional immersion ultrasound (US) or partial coherence interferometry (PCI).

Methods: Prospective, comparative case series. Patients undergoing cataract surgery were randomly divided in two groups with regard to the IOL power calculation method.

Corneal biomechanical evaluation in healthy thin corneas compared with matched keratoconus cases.

Purpose: To evaluate and compare corneal hysteresis (CH) and corneal resistance factor (CRF) in healthy eyes with a central corneal thickness (CCT) < 505 µm with CH and CRF in gender-, age-, and CCT-matched keratoconus cases, and to estimate the sensitivity and specificity of these parameters for discriminating between the two groups.

Methods: Prospective, comparative case series. In total 46 eyes from 30 healthy patients with CCT < 505 µm, and 42 eyes from 30 CCT-, gender- and age-matched keratoconus cases were enrolled.

Ability of corneal biomechanical metrics and anterior segment data in the differentiation of keratoconus and healthy corneas.

Purpose: To evaluate the sensitivity, specificity, and test accuracy of corneal biomechanical metrics and anterior segment data in differentiating keratoconus from healthy corneas.

Methods: Comparative case series. Patients with and without keratoconus (gender and age-matched) were submitted for complete eye examinations including corneal hysteresis (CH) and corneal resistance factor (CRF) as measured by the Ocular Response Analyzer and anterior segment data as gathered through Pentacam assessments.

Refractive enhancement following presbyopia-correcting intraocular lens implantation.

Purpose Of Review: Presbyopia-correcting intraocular lenses are widely available. Residual ametropia is one of the most common issues that can result in patient dissatisfaction. Options for correcting refractive surprises include piggyback intraocular lens implantation, corneal incisional surgery and laser correction.

Nonarteritic anterior ischemic optic neuropathy after uneventful phacoemulsification: case report.

To report a case of nonarteritic anterior ischemic optic neuropathy (NAION) after uneventful cataract extraction and intraocular lens implantation. Prospective, observational case report and literature review. We report the case history of a 74-year-old woman who underwent phacoemulsification and developed sudden loss of vision on the 13th postoperative day.

Epidemiological findings of ocular trauma in childhood.

Purpose: To describe epidemiological findings of ocular trauma in childhood in an emergency unit.

Methods: A retrospective study was carried out including patients under 16 years old who were treated for ocular trauma at the emergency unit of the Federal University of São Paulo from September 2001 to September 2004. Age, sex, involved eye, place, circumstance and mechanism of injury, initial visual acuity and immediate management were recorded.