Results 31 to 40 of about 2,414 (173)
Journal of Ophthalmology, Volume 2021, Issue 1, 2021., 2021 Purpose. To assess the repeatability and agreement of refractive measurements using 2WIN‐S photoscreening with the gold‐standard cycloplegic retinoscope refraction. Design. Single centre, cross‐sectional study. Methods. Spherical, cylindrical, axis, and spherical equivalent of 194 bilateral eyes of 97 children were assessed using a retinoscope and 2WIN‐
Ziming Liu +6 more
wiley +1 more source
Research of photorefractive properties in lithium niobate crystals by raman and photoinduced light scatering [PDF]
Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2017 In Raman spectra of LiNbO3 crystals with photorefractive response in Y(ZX)Y scattering geometry a significant widening was detected of the band with frequency 630 cm-1 4A1(TO) that corresponds to totally symmetrical vibrations of oxygen octahedra.
N.V. Sidorov +2 more
doaj +1 more source
Photorefraction images analysis through neural networks [PDF]
, 2011 The importance of an early evaluation of infants’ visual system condition is long time recognized. Non-corrected visual disorders may lead to major vision and developmental non-reversible limitations in the future.
Costa, Manuel F. M. +2 more
core +1 more source
Accuracy of Photorefraction and Wavefront-Based Autorefraction in Children Under 3 Years of Age
Beyoglu Eye Journal, 2021 Objectives: This study was designed to assess the accuracy of photorefraction and wavefront-based autorefraction in children under 3 years of age. Methods: A cross-sectional study was performed with children who had no ocular abnormalities other than a ...
C. Kara, I. S. Petricli
semanticscholar +1 more source
Advantages, limitations, and diagnostic accuracy of photoscreeners in early detection of Amblyopia: a review [PDF]
, 2016 Amblyopia detection is important to ensure proper visual development and avoid permanent decrease of visual acuity. This condition does not produce symptoms, so it is difficult to diagnose if a vision problem actually exists.
de Juan V +3 more
core +2 more sources
Photorefraction-induced Bragg scattering in cryogenic lithium niobate ring resonators. [PDF]
Optics Letters, 2020 We report intracavity Bragg scattering induced by the photorefractive (PR) effect in high-Q lithium niobate ring resonators at cryogenic temperatures. We show that when a cavity mode is strongly excited, the PR effect imprints a long-lived periodic space-
Yuntao Xu +5 more
semanticscholar +1 more source
Photonics, 2023 A nonlinear optical double-doped single-crystal LiNbO3:Gd:Mg (Gd concentration is 0.003, Mg—0.65 wt % in the crystal) has been researched by several optical methods: laser conoscopy, photoinduced light scattering (PILS), optical spectroscopy, and Raman ...
Nikolay Sidorov +4 more
doaj +1 more source
Receding and disparity cues aid relaxation of accommodation [PDF]
, 2009 Purpose. Accommodation can mask hyperopia and reduce the accuracy of non-cycloplegic refraction. It is, therefore, important to minimize accommodation to obtain a measure of hyperopia as accurate as possible.
Horwood, A. M., Riddell, P. M.
core +1 more source
Floppy iris syndrome with oral imipramine: A case series
Indian Journal of Ophthalmology, 2012 Intraoperative floppy iris syndrome (IFIS) has commonly been seen with long-term use of α1-adrenoceptor blocking agents. We observed IFIS in three patients during phacoemulsification due to oral imipramine therapy.
Arvind Gupta, Renuka Srinivasan
doaj +1 more source
Sphingosine-1 phosphate prevents ethanol-induced corneal epithelial apoptosis
Indian Journal of Ophthalmology, 2012 Background: Apoptosis is a programmed cell death in multicellular organisms, found in a wide variety of conditions, including inflammatory process, everywhere in the body, including the cornea and conjunctiva. Aim: To evaluate the effect of a new topical
Pierre Fournie +5 more
doaj +1 more source