Results 41 to 50 of about 533 (174)
Indian Journal of Ophthalmology, 2012 Iatrogenic keratectasia has been reported subsequent to refractive surgery or trauma. Hexagonal keratotomy (HK) is a surgical incisional technique to correct hyperopia.
Paras Mehta +2 more
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Unilateral conjunctival ulcer due to Stenotrophomonas maltophilia infection
Indian Journal of Ophthalmology, 2012 We report a case of unilateral conjunctival ulcer due to Stenotrophomonas maltophilia infection in an immunocompetent individual. A 44-year-old male presented with complaints of pain and yellowish discharge in the right eye for one week.
Padmamalini Mahendradas +3 more
doaj +1 more source
Radiation Modification of Optical Characteristics of LiNbO3:Zn and LiNbO3:Mg Crystals
Crystals, 2022 The modification of the optical characteristics of LiNbO3:Zn and LiNbO3:Mg crystals grown by the Czochralski method was investigated using β and γ radiation.
Mikhail Palatnikov +4 more
doaj +1 more source
Accuracy and precision of a sphero‐cylindrical over‐refraction app for smartphones
Ophthalmic and Physiological Optics, Volume 45, Issue 7, Page 1662-1675, November 2025.Abstract Purpose To evaluate the accuracy and precision of a web‐based smartphone app designed to measure sphero‐cylindrical over‐refraction. Methods A total of 307 healthy young subjects (22.5 ± 3.4 years) underwent clinical subjective refraction. In addition to each subject's refractive correction, spherical and cylindrical errors from −1.50 to 0.00 ...
Rosa Maria Salmeron‐Campillo +5 more
wiley +1 more source
JMIR Medical Informatics, 2020 BackgroundAccurately predicting refractive error in children is crucial for detecting amblyopia, which can lead to permanent visual impairment, but is potentially curable if detected early.
Chun, Jaehyeong +7 more
doaj +1 more source
Ophthalmic and Physiological Optics, Volume 39, Issue 4, Page 253-259, July 2019., 2019 Abstract Purpose The PowerRef 3 is frequently used in studying the near triad of accommodation, vergence and pupil responses in normal and clinical populations. Within a range, the defocus measurement of the PowerRef 3 is linearly related to the eye's defocus. While the default factory‐calibrated slope of this relation (calibration factor) is 1, it has
Saeideh Ghahghaei +3 more
wiley +1 more source
Drive-by Photoscreening: Plusoptix, 2WIN and Blinq Amblyopia Detection During the COVID-19 Pandemic
Clinical Ophthalmology, 2021 Mason Keffalos,1 Samuel Martin,2 Robert Arnold2 1Boise State University, Boise, ID, USA; 2Alaska Blind Child Discovery, Anchorage, AK, USACorrespondence: Robert ArnoldAlaska Blind Child Discovery, Alaska Children’s EYE & Strabismus, 3500 ...
Keffalos M, Martin S, Arnold R
doaj
Delayed-onset bilateral abducens paresis after head trauma
Indian Journal of Ophthalmology, 2012 Bilateral sixth nerve paresis following closed head injury, though rare, is a known entity. However, delayed-onset post-traumatic bilateral abducens paresis is extremely rare. We present two cases.
Pravin Salunke +2 more
doaj +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 +5 more
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Nonvolatile storage in photorefractive crystals [PDF]
Optics Letters, 1994 We propose and demonstrate a nonvolatile holographic recording system for storing two-dimensional images. The readout light in this system is not absorbed by the holographic medium, and the data are preformatted or postformatted so that lines from different holograms are interleaved to satisfy the Bragg-matching condition.
MOK, F., LI, H.Y.S., PSALTIS, D.
openaire +3 more sources