Results 31 to 40 of about 200,462 (294)

Stereoacuity Among Patients with Refractive Error at University of Gondar, Northwest Ethiopia

open access: yesClinical Optometry, 2021
Mikias Mered Tilahun, Mohammed Seid Hussen, Getasew Alemu Mersha, Biruk Lelisa Eticha Department of Optometry, School of Medicine, University of Gondar, Comprehensive Specialized Hospital, Gondar, EthiopiaCorrespondence: Getasew Alemu Mersha POB: 196 Tel
Tilahun MM   +3 more
doaj  

Compact Models of Presbyopia Accommodative Errors for Wearable Adaptive-Optics Vision Correction Devices

open access: yesIEEE Access, 2022
Subjective accommodation refractive error models are essential for implementing adaptive vision correction devices that utilize varifocal optics. This article describes compact empirical models of subjective accommodative refractive errors in subjects ...
Mohit U. Karkhanis   +7 more
doaj   +1 more source

Method for Assessing the Fidelity of Optical Diffraction Tomography Reconstruction Methods

open access: yes, 2019
We use a spatial light modulator in a diffraction tomographic system to assess the accuracy of different refractive index reconstruction algorithms. Optical phase conjugation principles through complex media, allows us to quantify the error for different
Ayoub, Ahmed B.   +4 more
core   +1 more source

Refractive error sensing from wavefront slopes [PDF]

open access: yes, 1998
15 páginas, 8 figuras, 2 tablas.The problem of measuring the objective refractive error with an aberrometer has shown to be more elusive than expected.
Jaeschke, C.   +3 more
core   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

open access: yesFEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Management of Residual Refractive Error after Cataract Phacoemulsification. Part 1. Keratorefractive Approaches

open access: yesOftalʹmologiâ, 2017
The review presents an analysis of the literature data on the methods of surgical correction of residual refractive error after cataract phacoemulsification. Keratorefractive and intraocular approaches are considered in details.
K. B. Pershin   +4 more
doaj   +1 more source

Prevalence of Refractive Error and Strabismus in Primary School Children of Tehsil Lakki Marwat, Khyber Pakhtunkhwa Pakistan

open access: yesJournal of Gandhara Medical and Dental Sciences, 2020
OBJECTIVES: Refractive errors and strabismus continue to remain a significant public health problem. Among school children it has an impact on child development.
Faheem Ullah   +4 more
doaj   +1 more source

Peripheral refractive changes associated with myopia progression [PDF]

open access: yes, 2013
Purpose.: To evaluate the changes in peripheral refraction profiles associated with myopia progression and treatment modalities used in the Cambridge Anti-Myopia Study.
Allen, Peter M.   +7 more
core   +1 more source

Uncorrected refractive errors

open access: yesIndian Journal of Ophthalmology, 2012
Global estimates indicate that more than 2.3 billion people in the world suffer from poor vision due to refractive error; of which 670 million people are considered visually impaired because they do not have access to corrective treatment. Refractive errors, if uncorrected, results in an impaired quality of life for millions of people worldwide ...
Kovin S Naidoo, Jyoti Jaggernath
openaire   +3 more sources

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