Results 21 to 30 of about 470 (166)

Vergence and accommodation responses in the control of intermittent exotropia

Ophthalmic and Physiological Optics, Volume 43, Issue 4, Page 598-614, July 2023., 2023
Abstract Purpose Individuals with different types of intermittent exotropia (IXT) may use neurally coupled accommodation and vergence responses differently from those without exotropia to achieve eye alignment. This study examined the relationship between simultaneously recorded accommodation and vergence responses in children and young adults with a ...
Clara Mestre, Sonisha Neupane, Vivian Manh, Kristina Tarczy‐Hornoch, T. Rowan Candy   +4 more
wiley   +1 more source

Worsening vision at age 4–5 in England post‐COVID: Evidence from a large database of vision screening data

Ophthalmic and Physiological Optics, Volume 43, Issue 3, Page 454-465, May 2023., 2023
Abstract Purpose Myopia prevalence has increased in the UK at age 10‐16y, but little is known about younger children. We hypothesise that if the ‘myopia epidemic’ is affecting young children, then there will be increasing rates of bilateral reduced unaided vision (V) at vision screenings of children 4–5 years of age.
Rakhee Shah, David F. Edgar, Bruce J. W. Evans   +2 more
wiley   +1 more source

Systematic review and meta‐analysis on the agreement of non‐cycloplegic and cycloplegic refraction in children

Ophthalmic and Physiological Optics, Volume 42, Issue 6, Page 1276-1288, November 2022., 2022
Abstract Objective To determine the diagnostic agreement of non‐cycloplegic and cycloplegic refraction in children. Method The study methodology followed Preferred Reporting Items for Systematic Reviews and Meta‐Analyses (PRISMA) guidelines. Electronic databases were searched for comparative studies exploring refraction performed on children under non ...
Salma Wilson, Irene Ctori, Rakhee Shah, Catherine Suttle, Miriam L. Conway   +4 more
wiley   +1 more source

Comparing School‐Aged Refraction Measurements Using the 2WIN‐S Portable Refractor in Relation to Cycloplegic Retinoscopy: A Cross‐Sectional Study

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, Emmanuel Eric Pazo, Hong Ye, Cui Yu, Ling Xu, Wei He, Norberto López-Gil   +6 more
wiley   +1 more source

Comparison of photorefraction by photoscreener (PlusoptiXA12R) with autorefractometer and cycloplegic retinoscopy in children between 5 and 15 years

Journal of Clinical Ophthalmology and Research, 2021
Aim: The aim of the study is to compare the photorefraction values by photoscreener (PlusoptiXA12R, PO) with those of autorefractometer (AR) (TOPCON RM800) and cycloplegic retinoscopy (CR) in children.
S. Kripa, V Rajesh Prabu, H Ranjini, Parul Priyambada, Venu Muralidhar   +4 more
doaj   +1 more source

Photorefraction vision screening: value, constancy and credibility

Journal of the Egyptian Ophthalmological Society, 2019
Background The purpose of this study was to compare photorefraction using Plusoptix vision screening with that of standard cycloplegic refraction, to detect variability between different observers.
Ahmed F Gabr, Mohamed A Nassef, Shaimaa S Soliman   +2 more
doaj   +1 more source

Role of microfluctuations in accommodation: a novel approach to reduce non-accommodative noise [PDF]

International Journal of Ophthalmology, 2019
Accommodative response and its possible role in myopia development has been explored through the study of the microfluctuations (MFs) of accommodation, which are commonly divided in high (1.0 to 2.3 Hz) and low (0.1 to 0.6 Hz) frequency components ...
Núria Lupón, Joan Gispets, Genis Cardona, Alba Tàpia, Hector Abril   +4 more
doaj   +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

Some Optical Properties of LiNbO₃:Gd³⁺(0.003):Mg²⁺(0.65 wt %) Single Crystal: A Promising Material for Laser Radiation Conversion

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, Mikhail Palatnikov, Natalya Teplyakova, Alexander Pyatyshev, Alexander Skrabatun   +4 more
doaj   +1 more source

Photorefraction-induced Bragg scattering in cryogenic lithium niobate ring resonators

, 2020
We report intracavity Bragg scattering induced by photorefractive (PR) effect in high-Q lithium niobate (LN) ring resonators at cryogenic temperatures.
Ayed Al Sayem (14381958), Chang-Ling Zou (1623613), Hong X. Tang (1535218), Linran Fan (2210911), Yuntao Xu (4588030)   +4 more
core   +1 more source