Results 61 to 70 of about 470 (166)

An analysis of the three-valence model of photorefraction

, 1999
In this paper we present an analysis of the three-valence model of photorefraction. The basic equations of the model are studied and solved to find zero- and first-order solutions in the steady state, including expressions for the space-charge field and ...
Damzen, MJ, Corner, L
core   +1 more source

Recommended practices for vision screening in pre‐school‐age children: A 2025 update

Optometry and Vision Science, Volume 102, Issue 10, Page 589-595, October 2025.
SIGNIFICANCE: Despite significant evidence supporting the utility of vision screening for identifying children who need further evaluation by an eye care professional, there is considerable variability in screening guidelines along with a lack of consensus for monitoring and reporting outcomes.
Yi Pang, Stacy A. Lyons, P. Kay Nottingham Chaplin, Sandra S. Block, Donna Fishman, Elise B. Ciner, on behalf of the Advisory Committee to the National Center for Children’s Vision and Eye Health at Prevent Blindness, Megan Collins, Rachel (Stacey) Anastasia Coulter, Afua Asare, Sofia Vargas Baucom, Sandra S. Block, Geoffrey Bradford, Elise Ciner, Danielle Crull, Carolyn (Carey) Drews‐Botsch, E. Eugenie Hartmann, Alex R. Kemper, Stephanie Klas, Phoebe Lenhart, Stacy Ayn Lyons, Marie Y. Mann, Lynne P. Meadows, Olachi Mezu‐Ndubuisi, Wanda Montalvo, Bruce Moore, Kathy O’Connor, Yi Pang, Millicent Peterseim, Nicole Pratt, Jean E. Ramsey, Michael X. Repka, Donny Suh, Shanyn Toulouse   +33 more
wiley   +1 more source

Dynamic distance direct ophthalmoscopy, a novel technique to assess accommodation in children

Indian Journal of Ophthalmology, 2012
Aim: To describe and compare dynamic distance direct ophthalmoscopy (DDDO) with dynamic retinoscopy (DR) in assessment of accommodation in children. Materials and Methods: This prospective observational study had four components.
Mihir Kothari, Suvarna Balankhe, Shalaka Paralkar, Deepali Nar, Shreya Bhagat, Shashank Ranade   +5 more
doaj   +1 more source

Accuracy of noncycloplegic photorefraction using Spot photoscreener in detecting amblyopia risk factors in preschool children in an Indian eye clinic. [PDF]

, 2020
PURPOSE: To evaluate the accuracy of Spot photoscreener (PS) as a noncycloplegic photorefractor in detecting amblyopia risk factors (ARFs) in preschool children in an Indian eye clinic setting.
Chaudhary, Jyotsana, Adil, Mohd, Siddiqui, Zeeshan, Sharma, Manasvini, Ganesh, Suma, Tibrewal, Shailja, Sabharwal, Shalinder, Sachdeva, Neha   +7 more
core   +1 more source

Synaptic Function in Memristor Devices for Neuromorphic Circuit Applications

Advanced Electronic Materials, Volume 11, Issue 14, September 4, 2025.
Discover how neuromorphic devices mimic brain‐like learning: this article explores how ionic and electronic conduction processes enable artificial synapses to adapt across time scales. Uncover the essential ingredients—state‐variable dynamics, rectification, and memory—and how they can be probed through nonlinear diagnostics to engineer smarter, more ...
Juan Bisquert, Wooyoung Shim, So‐Yeon Kim, Bernabe Linares‐Barranco   +3 more
wiley   +1 more source

Photorefraction and Optical Damage Resistance Enhancement in Uranium-Doped Lithium Niobate Crystals by Hafnium Co-Doping

Crystals
A series of Hf co-doped uranium-doped lithium niobate (LN:U,Hf) crystals with a diameter of one inch were grown by the modified Bridgman method. XPS analysis showed that U ions coexist in mixed valence states of U4+, U5+, and U6+.
Jiayue Xu, Ming Xi, Dong Zhang, Chenkai Fang, Dahuai Zheng, Hongde Liu, Yaoqing Chu, Hui Shen, Tian Tian   +8 more
doaj   +1 more source

Bilateral spontaneous dislocation of posterior chamber intraocular lens in a patient with gyrate atrophy

Indian Journal of Ophthalmology, 2012
We report a patient with gyrate atrophy, a rare metabolic disease, who had bilateral late spontaneous posterior dislocation of in-the-bag posterior chamber intraocular lens (PCIOL). He underwent pars plana vitrectomy, PCIOL retrieval and anterior chamber
Michael Kinori, Howard Desatnik, Joseph Moisseiev   +2 more
doaj   +1 more source

Interband photorefraction at visible wavelengths in Sn2P2S6

, 2006
International audienceContinuous-wave photorefractive experiments in Sn2P2S6 crystals and interband photorefraction at the visible wavelengths of 514 and 488nm are presented.
Jazbinsek, M., Haertle, Daniel, Montemezzani, Germano, Mosimann, Roger, Mosimann, R., Haertle, D., Montemezzani, G., Guenter, P., Günter, Peter, Jazbinsek, Mojca   +9 more
core   +1 more source

Optimising non‐cycloplegic screening strategies for early detection of pre‐myopia and myopia in young children

Ophthalmic and Physiological Optics, Volume 45, Issue 5, Page 1080-1089, July 2025.
Abstract Purpose Early detection of myopia is essential to delay its onset and progression. Pre‐myopia, defined by an inadequate hyperopic reserve, increases myopia risk in childhood. However, effective screening methods remain limited. This study aimed to develop practical non‐cycloplegic screening methods for pre‐myopia and myopia in 6‐ to 7‐year ...
Síofra Harrington, Michael Moore, James Loughman, Ian Flitcroft, Veronica O'Dwyer   +4 more
wiley   +1 more source

Short-term outcome of Boston Type 1 keratoprosthesis for bilateral limbal stem cell deficiency

Indian Journal of Ophthalmology, 2012
This study reports the short-term functional and anatomical outcome of Boston Type 1 keratoprosthesis (Boston Kpro) implantation for bilateral limbal stem cell deficiency (LCSD).
Sayan Basu, Mukesh Taneja, Raja Narayanan, Sirisha Senthil, Virender S Sangwan   +4 more
doaj   +1 more source