Results 91 to 100 of about 60,613 (227)

The Waterloo Differential Acuity Test (WatDAT)—Testability and normative data

Ophthalmic and Physiological Optics, EarlyView.
Abstract Purpose To investigate the testability of the WatDAT for measuring recognition visual acuity (VA) in children aged between 18 to 48 months, report preliminary age‐related data and compare with two commercially available matching tests. Methods A total of 57 children (18.5–45.8 months) attended for two sessions.
S. Aryal, E. L. Irving, L. W. Christian, D. A. Jones, D. McCulloch, S. J. Leat   +5 more
wiley   +1 more source

Cataract prevalence, cataract surgical coverage and barriers to uptake of cataract surgical services in Pakistan: the Pakistan National Blindness and Visual Impairment Survey.

, 2007
AIM: To estimate the prevalence of visual impairment and blindness caused by cataract, the prevalence of aphakia/pseudophakia, cataract surgical coverage (CSC) and to identify barriers to the uptake of cataract services among adults aged >or=30 years in ...
Bourne, R, Dineen, B, Foster, A, Gilbert, CE, Jadoon, Z, Khan, MA, Khan, MD, Pakistan National Eye Survey Study Group, Shah, SP   +8 more
core   +1 more source

Implications of Atmospheric Differential Refraction for Adaptive Optics Observations [PDF]

, 2002
Many adaptive optics systems operate by measuring the distortion of the wavefront in one wavelength range and performing the scientific observations in a second, different wavelength range.
Roe, Henry G.
core   +2 more sources

Can Rhodiola rosea supplementation mitigate digital eye strain? A triple‐blinded placebo‐controlled study

Ophthalmic and Physiological Optics, EarlyView.
Abstract Purpose This study aimed to assess the impact of Rhodiola rosea (RR) supplementation on the dynamics of the accommodative response and digital eye strain (DES) symptoms following 30‐min visual tasks with different levels of cognitive demand. Methods Eighteen young adults (mean age ± SD: 24.6 ± 4.0 years) participated in this placebo‐controlled,
Paula M. Lara, Jesús Vera, Daniel Marcos‐Frutos, Carlos Alix‐Fages, Pablo Jiménez‐Martínez, Amador García‐Ramos, Beatriz Redondo   +6 more
wiley   +1 more source

Informed consent in refractive surgery: in-person vs telemedicine approach. [PDF]

, 2018
Purpose:The aim of this study was to compare the quality of consent process in refractive surgery between patients who had a preoperative consent discussion with the surgeon using a telemedicine approach and those who had a face-to-face discussion ...
Hannan, Stephen J, Pelouskova, Martina, Schallhorn, Julie M, Schallhorn, Steven C, Teenan, David   +4 more
core   +1 more source

A comprehensive radial velocity error budget for next generation Doppler spectrometers

, 2016
We describe a detailed radial velocity error budget for the NASA-NSF Extreme Precision Doppler Spectrometer instrument concept NEID (NN-explore Exoplanet Investigations with Doppler spectroscopy).
Bender, Chad, Blake, Cullen, Gong, Qian, Halverson, Samuel, Hearty, Fred, Levi, Eric, Mahadevan, Suvrath, McElwain, Michael, Monson, Andrew, Ramsey, Lawrence, Robertson, Paul, Roy, Arpita, Schwab, Christian, Stefánsson, Guðmundur Kári, Terrien, Ryan, Wang, Sharon, Wright, Jason   +16 more
core   +1 more source

Radiometric and safety assessment of a ‘low‐level red‐light’ myopia control device

Ophthalmic and Physiological Optics, EarlyView.
Abstract Purpose Recent literature has demonstrated that ‘low‐level red‐light therapy’ may be effective at slowing axial elongation in children, but reports have questioned the safety of some red‐light devices. The current work explored the beam characteristics and hazard potential for a myopia control red‐light device.
Josh Richards, Jennifer J. Hunter, Javier Gantes‐Nuñez, Arthur Bradley, Pete Kollbaum   +4 more
wiley   +1 more source

Prevalence and causes of blindness and visual impairment in Muyuka: a rural health district in South West Province, Cameroon.

, 2006
AIM: To estimate the prevalence and causes of blindness and visual impairment in the population aged 40 years and over in Muyuka, a rural district in the South West Province of Cameroon.
Befidi-Mengue, R, Dineen, B, Foster, A, Kuper, H, Oye, JE   +4 more
core   +2 more sources

Reading performance in children with visual function anomalies [PDF]

, 2014
Aims - To compare reading performance in children with and without visual function anomalies and identify the influence of abnormal visual function and other variables in reading ability.
Lança, Carla Costa, Prista, João, Serra, Helena   +2 more
core   +1 more source

Influence of time‐of‐day and light wavelengths on ocular responses to defocus

Ophthalmic and Physiological Optics, EarlyView.
Abstract Purpose This study explored potential effects of time of day and light filters on the ocular response to 1‐h myopic defocus and associated changes in melatonin. Methods Twenty healthy myopic adults (mean age ± SD: 25.9 ± 3.9 years; spherical equivalent: −4.12 ± 1.00 D) participated in this study.
Xiao Nicole Liu, Thomas John Naduvilath, Padmaja R. Sankaridurg   +2 more
wiley   +1 more source