Results 21 to 30 of about 13,251 (225)

SMALL ELECTRIC OPHTHALMOSCOPES [PDF]

British Journal of Ophthalmology, 1923
B. Graves
openaire   +3 more sources

Eyesi direct ophthalmoscope simulator: an effective training tool for medical undergraduates [PDF]

BMC Medical Education
Introduction Non-ophthalmologists often lack sufficient operational training to use a direct ophthalmoscope proficiently, resulting in a global deficit of basic ophthalmological skills among general practitioners.
Canying Liu, Jicheng Lin, Siting Wu, Yingting Zhu, Yuxian Zou, Qi Zhang, Zhidong Li, Yehong Zhuo, Yiqing Li   +8 more
doaj   +2 more sources

Telecentric model eye for correction of image distortion in adaptive optics ophthalmoscopes. [PDF]

Biomed Opt Express
Here, we demonstrate a telecentric model eye for measuring scanning, sampling, and optical distortion in AO ophthalmoscopes across a 10-diopter focus range, seeking to improve the reproducibility of adaptive optics (AO) ophthalmoscopy biomarkers.
Akondi V, Ayubi GA, Huang X, Kunala K, Dubra A.   +4 more
europepmc   +2 more sources

Optical incoherence tomography: a method to generate tomographic retinal cross-sections with non-interferometric adaptive optics ophthalmoscopes

BiOS, 2020
We present Optical Incoherence Tomography (OIT): a completely digital method to generate tomographic retinal cross-sections from en-face through-focus image stacks acquired by non-interferometric imaging systems, such as en-face adaptive optics (AO ...
P. Mecê, Elena Gofas-Salas, M. Pâques, K. Grieve, S. Meimon   +4 more
semanticscholar   +1 more source

First-order Design of a Reflective Viewfinder for Adaptive Optics Ophthalmoscopy [PDF]

, 2012
Adaptive optics (AO) ophthalmoscopes with small fields of view have limited clinical utility. We propose to address this problem in reflective instruments by incorporating a viewfinder pupil relay designed by considering pupil and image centering and ...
Dubra, Alfredo, Sulai, Yusufu N.
core   +2 more sources

Functional Imaging of the Outer Retinal Complex using High Fidelity Imaging Retinal Densitometry [PDF]

, 2020
We describe a new technique, high fidelity Imaging Retinal Densitometry (IRD), which probes the functional integrity of the outer retinal complex. We demonstrate the ability of the technique to map visual pigment optical density and synthesis rates in ...
Atkinson, D., Binns, A. M., Fergusson, J., Gaffney, A. J., Henry, D., Jones, C., Lamb, T. D., Margrain, T. H., Melotte, D., Miller, C., Todd, S., Wood, A.   +11 more
core   +3 more sources

Smartphone ophthalmoscopy: patient and student practitioner perceptions [PDF]

, 2019
It can take several years to become proficient at direct ophthalmoscopy; the instrument’s single eyepiece allows only one individual to view the image at a time, which is considered disadvantageous during teaching.
Huntjens, B., Nagra, M.
core   +2 more sources

Diabetic Retinopathy among Patients with Prediabetes Attending the Outpatient Department of Ophthalmology in a Tertiary Eye Care Centre: A Descriptive Cross-sectional Study

Journal of Nepal Medical Association, 2023
Introduction: Diabetic retinopathy is a specific microvascular ocular complication associated with diabetes. However, retinopathy has also been reported in people with prediabetes. The study aimed to find out the prevalence of diabetic retinopathy among
Arjun Shrestha, Rinkal Suwal, Sikshya Adhikari, Nirsara Shrestha, Biju Shrestha, Bijay Khatri   +5 more
doaj   +1 more source

Adaptive Optics Scanning Ophthalmoscopy with Annular Pupils [PDF]

, 2012
Annular apodization of the illumination and/or imaging pupils of an adaptive optics scanning light ophthalmoscope (AOSLO) for improving transverse resolution was evaluated using three different normalized inner radii (0.26, 0.39 and 0.52).
Dubra, Alfredo, Sulai, Yusufu N.
core   +2 more sources

Comparisons of Effective Fields of Two Ultra-Widefield Ophthalmoscopes, Optos 200Tx and Clarus 500

BioMed Research International, 2019
Purpose To compare the effective fields of the Optos 200Tx® and Clarus 500™, two ultra-widefield ophthalmoscopes, based on their ability to image branches of retinal vessel in the four retinal quadrants.
Y. Matsui, Atsushi Ichio, Asako Sugawara, Eriko Uchiyama, Hitomi Suimon, Hisashi Matsubara, M. Sugimoto, K. Ikesugi, M. Kondo   +8 more
semanticscholar   +1 more source