Results 101 to 110 of about 2,414 (173)

The 13th Bielschowsky lecture: accommodation and convergence – ratios, linkages, styles and mental somersaults [PDF]

, 2019
A relatively fixed relationship between convergence and accommodation appears to be fundamental to binocular vision and its disorders. The accommodative convergence to accommodation ratio (AC/A) has traditionally been considered a major explanatory ...
Horwood, Anna
core  

Photorefraction in Polymers [PDF]

علوم و تکنولوژی پلیمر, 1996
H. Khoshsima, H. Tajalli, A. A. Entezami
doaj   +1 more source

Photorefraction estimates of refractive power varies with the ethnic origin of human eyes

Scientific Reports, 2015
Eccentric infrared photorefraction is an attractive tool for measuring refractive errors of young children and uncooperative subjects, for it allows quick and non-invasive acquisition of data from both eyes simultaneously over a reasonably large dioptric
N. Sravani, V. K. Nilagiri, S. Bharadwaj
semanticscholar   +1 more source

The photorefractive characteristics of bismuth-oxide doped lithium niobate crystals

AIP Advances, 2015
Bismuth-doped lithium niobate (LN:Bi) crystals were grown by Czochralski method and their optical damage resistance, photorefraction, absorption spectra, and defect energy levels were investigated.
Dahuai Zheng, Yongfa Kong, Shiguo Liu, Jiaying Yao, Ling Zhang, Shaolin Chen, Jingjun Xu   +6 more
doaj   +1 more source

Determination of the absorption constant in the interband region by photocurrent measurements [PDF]

, 2018
We determined high absorption constants of crystals from photocurrent measurements within the interband absorption region (10-104cm-1). The method has been demonstrated in the interband absorption regime near 530nm in Sn2P2S6, a novel infrared sensitive ...
Günter, P., Haertle, D., Jazbinsek, M., Montemezzani, G., Mosimann, R.   +4 more
core  

Polarization-dependence of palladium deposition on ferroelectric lithium niobate (0001) surfaces

, 2011
We investigate the effect of ferroelectric polarization direction on the geometric properties of Pd deposited on the positive and negative surfaces of LiNbO$_3$ (0001).
Andrew M. Rappe, Michael Rutenberg Schoenberg, Seungchul Kim, T. Volk   +3 more
core   +1 more source

A deep-learning-based prediction of refractive error using photorefraction images captured by smartphone: Model Development and Validation Study. (Preprint)

, 2019
BACKGROUND Accurately predicting refractive error in children is crucial for detecting amblyopia, which can lead to permanent visual impairment, but is potentially curable if detected early.
J. Chun, Youngjun Kim, Kyungyoon Shin, S. Han, S. Oh, Tae-Young Chung, Kyung-Ah Park, D. Lim   +7 more
semanticscholar   +1 more source

Comparative Feature-Guided Regression Network with a Model-Eye Pretrained Model for Online Refractive Error Screening

Future Internet
With the development of the internet, the incidence of myopia is showing a trend towards younger ages, making routine vision screening increasingly essential.
Jiayi Wang, Tianyou Zheng, Yang Zhang, Tianli Zheng, Weiwei Fu   +4 more
doaj   +1 more source

Repetibilidad de la fotorrefracción en población universitaria sana [PDF]

, 2019
Introducción. La ambliopía provoca una disminución de la visión sin causa patológica que, si se trata a tiempo, puede llegar a ser reversible. La importancia de la detección de la ambliopía reside en la posterior calidad visual del paciente con un ...
González Bueno, Paula
core  

The Influence of Race, Age, and Pupil Size On the Measurement of A Photorefraction Device

, 2017
: Photorefraction (PR) methods have been widely used for pediatric vision screening since the 1980’ s. While PR is easy to implement, the accuracy of refractive error measurements in humans has been unsatisfactory, largely due to the variations of ...
Lei Shi, Ying-Ling Chen, James W. L. Lewis   +2 more
semanticscholar   +1 more source