Month: February 2013

Toward Zero Effective Phacoemulsification Time Using Femtosecond Laser Pretreatment – Corrected Proof

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Objective:
To compare effective phacoemulsification time after femtosecond laser pretreatment with conventional phacoemulsification and the associated effect on visual outcomes and endothelial cell loss.

Design:
Prospective, consecutive, single-surgeon case-control study.

Controls:
Controls underwent phacoemulsification cataract extraction plus insertion of an intraocular lens (IOL). Cases underwent pretreatment with the femtosecond laser followed by phacoemulsification cataract extraction and IOL insertion.

Methods:
Two hundred one eyes underwent cataract surgery between April 2012 and July 2012. Data collected included patient demographics, preoperative characteristics, femtosecond lens fragmentation method, effective phacoemulsification time (EPT), intraoperative complications, and postoperative outcomes.

Main Outcome Measures:
Effective phacoemulsification time, intraoperative complications, (Read more...)

Intracorneal ring segments may not halt progressive keratoconus in long term

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WARSAW, Poland — Implantation of intracorneal ring segments in young keratoconus patients may not be able to stop the progressive nature of the disease, even though it may provided a significant short-term improvement in visual, refractive and topographic status, according to one surgeon.”Several studies have shown the efficacy of this procedure in improving [visual acuity] and flattening the central cornea. However, there is no scientific data to support that corneal ring segment implantation can halt the progressive nature of the disease,” Alfredo Vega-Estrada, MD, said at the winter meeting of (Read more...)

Agreement of Flicker Chronoscopy for Structural Glaucomatous Progression Detection and Factors Associated With Progression – Corrected Proof

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Purpose: To evaluate agreement of flicker chronoscopy for structural glaucomatous progression detection and factors associated with progression.Design: Retrospective cohort study.Methods: Two glaucoma fellowship–trained ophthalmologists, masked to temporal sequence, independently graded serial flicker chronoscopy images from 1 eye of a cohort of glaucoma patients for features of structural progression. Agreement between graders was determined, as was accuracy for determining the temporal order of images. After adjudication, simple and multiple logistic models were constructed to determine baseline variables associated with increased odds of progression.Results: Fifty of 103 included eyes/patients (48.5%) had at least 1 sign of structural progression. Temporal sequence was incorrectly (Read more...)

Peripheral Autofluorescence and Clinical Findings in Neovascular and Non-neovascular Age-related Macular Degeneration – Corrected Proof

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Purpose:
To characterize peripheral fundus autofluorescence (FAF) abnormalities in patients with age-related macular degeneration (AMD), correlate these with clinical findings, and identify risk factors associated with these FAF abnormalities.

Design:
Clinic-based, cross-sectional study.

Participants:
A total of 119 consecutive patients: 100 patients with AMD (200 eyes) and 19 patients without AMD (38 eyes).

Methods:
In a prospective study performed at the Doheny Eye Institute, University of Southern California, widefield 200-degree FAF and color images were obtained by the Optos 200Tx Ultra-Widefield device (Optos, Dunfermline, Scotland) using a standardized imaging protocol. The FAF images were captured centered on the fovea, and (Read more...)

Reading Performance in Infantile Nystagmus – Corrected Proof

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Objective:
To characterize reading deficits in infantile nystagmus (IN), to determine optimal font sizes for reading in IN, and to investigate whether visual acuity (VA) and severity of nystagmus are good indicators of reading performance in IN.

Design:
Prospective cross-sectional study.

Participants and Controls:
Seventy-one participants with IN (37 idiopathic, 34 with albinism) and 20 age-matched controls.

Methods:
Reading performance was assessed using Radner reading charts and was compared with near logarithm of the minimum angle of resolution (logMAR) VA, nystagmus intensity, and foveation characteristics as quantified using eye movement recordings.

Main Outcome Measures:
Reading acuity (smallest readable font size), (Read more...)

Outdoor Activity during Class Recess Reduces Myopia Onset and Progression in School Children – Corrected Proof

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Purpose:
The aim of this study was to investigate the effect of outdoor activity during class recess on myopia changes among elementary school students in a suburban area of Taiwan.

Design:
Prospective, comparative, consecutive, interventional study.

Participants:
Elementary school students 7 to 11 years of age recruited from 2 nearby schools located in a suburban area of southern Taiwan.

Intervention:
The children of one school participated in the interventions, whereas those from the other school served as the control group. The interventions consisted of performing a recess outside the classroom (ROC) program that encouraged children to go outside for outdoor (Read more...)