Results 1 to 10 of about 376,107 (295)
Optimizing the intraocular lens formula constant according to intraocular lens diameter [PDF]
International Journal of Ophthalmology, 2021 AIM: To determine whether the different diameters of a specific intraocular lens (IOL) have significantly different optimized SRK/T A constants and whether these new A constants can improve refractive outcomes.
Abdul R El-Khayat, Paul Tesha
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The relationships between lens diameter and ocular biometric parameters: an ultrasound biomicroscopy-based study [PDF]
Frontiers in Medicine, 2023 PurposeThis study aims to explore the relationships between lens diameter (LD) measured with ultrasound biomicroscopy (UBM) and ocular biometric parameters.MethodsOcular biometric parameters including axial length (AL), white-to-white distance (WTW ...
Zhiqian Huang +39 more
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Intraoperative Measurement of Crystalline Lens Diameter in Living Humans. [PDF]
Yonago Acta Med, 2022 There are no reports on accurate measurement of lens equatorial diameter of the living human eye. This study aimed to measure lens equatorial diameter with a special measurement device during cataract surgery and examine the relationships with preoperative parameters.From April 7 to December 1, 2019, the equatorial diameters of 24 eyes from 24 patients
Nagase D, Akura J, Omatsu Y, Inoue Y.
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Alport Patients without Classic Ocular Symptoms Have Smaller Lens Diameter. [PDF]
Med Sci Monit, 2019 BACKGROUND The aim of this study was to present ophthalmological findings regarding Alport syndrome and report refractometry data and to present possible early signs of the syndrome. MATERIAL AND METHODS Seven patients suffering from Alport syndrome were referred to the Department of Ophthalmology at the University of Debrecen between January 1st, 2014,
Suranyi E +7 more
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Influence of total intraocular lens diameter on efficacy and safety for in the bag cataract surgery
Oman Journal of Ophthalmology, 2018 > CONTEXT: Intraocular lenses with variable total diameter are supposed to fit better in the capsular bag and lead to fewer complications. AIMS: This study aims to investigate the efficacy and the safety of an intraocular lens model with variable total ...
Efstathios Vounotrypidis +5 more
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Compact Design of a 50° Field of View Collimating Lens for Lightguide-Based Augmented Reality Glasses [PDF]
MicromachinesDesigning a compact collimating lens system for augmented reality (AR) applications presents significant optical challenges. This paper presents a compact, 50-degree field-of-view collimating lens system explicitly designed for lightguide-based AR ...
Wen-Shing Sun +5 more
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Large diameter electrically tunable lens for ophthalmic distance accommodation
Biomedical Optics Express, 2023 Electrically tunable liquid crystal lens with 30 mm diameter is presented based on the refractive Fresnel concept. Relatively large optical power variation range (from – 0.74 to +0.71 Diopters) is demonstrated along with very low root mean square aberrations (≤0.15 µm).
Oleksandr Sova +7 more
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Accommodative Changes in Lens Diameter in Rhesus Monkeys [PDF]
Investigative Opthalmology & Visual Science, 2006 Some debate surrounds the accommodative mechanism in primates, particularly whether the lens equatorial diameter increases or decreases during accommodation. This study has been undertaken to measure the relationship between changes in lens diameter and refraction during accommodation in rhesus monkeys.Photorefraction was used to measure accommodation,
Adrian, Glasser +2 more
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Unusual optical coherence tomography and fundus autofluorescence findings of eclipse retinopathy
Indian Journal of Ophthalmology, 2012 A 63-year-old female patient complained of dimness in the central field of vision in the left eye after viewing an annular partial eclipse without adequate eye protection on 22 July 2009. Fundoscopy showed a wrinkled macular surface.
Kun-Hsien Li +3 more
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Large diameter nanostructured gradient index lens
Optics Express, 2012 In this paper we report on the development and optical properties of nanostructured gradient index microlenses with good chromatic behavior. We introduce a new fabrication concept for the development of large diameter nanostructured gradient index microlenses based on quantized gradient index profiles and the use of nanostructured meta-rods.
Jedrzej, Nowosielski +7 more
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