Results 91 to 100 of about 14,451 (267)

An Apparent Order of Sensory Ability Changes in Human Beings \ud [PDF]

open access: yes, 2009
Examination of records and personal documents of 1309 human beings isolated an apparent order of sensory ability changes, for 154 members of the sample both records and personal documents were available.
Lehmann, A.
core  

Regularities of changes of irido-ciliary-lenticular interrelations during presbyopia evelop-ment in patients with different types of refraction

open access: yesActa Biomedica Scientifica, 2015
The presbyopia formation in patients with different types of refractive errors has its own characteristics, which are unexplored. The purpose of this study was to identify the regularities of changes of irido-ciliary-lenticular relationships in ...
O. I. Rozanova
doaj  

Changes in Near Visual Acuity of Over Time in the Astronaut Corps [PDF]

open access: yes
We hypothesized that visual impairment due to intracranial pressure (VIIP) would increase the rate of which presbyopia would occur in the astronaut population, with long durations flyers at an especially high risk.
Locke, James   +4 more
core   +1 more source

Simple multifocal lens based on liquid crystals [PDF]

open access: yes, 2017
C
De Smet, Herbert   +3 more
core   +1 more source

Glycosaminoglycans in the human cornea: age-related changes [PDF]

open access: yes, 2015
AIM: To investigate possible age-related changes in glycosaminoglycans (GAGs) in the human cornea. The substances today called GAGs were previously referred to as mucopolysaccharides.
Anello, Giulia   +6 more
core   +2 more sources

Gender Differences in Service Utilization and Pattern of Free Presbyopia Glasses Distribution among Patients at Eye Camps in Nepal: An Observational Study

open access: yesJournal of Nepal Medical Association
Introduction: Presbyopia is an age-related refractive condition that causes difficulty in seeing nearby objects clearly. It affects a significant portion of the world’s population, especially individuals over 40 years old. Many studies show variation in
Ranjan Shah   +7 more
doaj   +1 more source

Age-related changes in local water and protein content of human eye lenses measured by Raman microspectroscopy [PDF]

open access: yes, 1991
The Raman microspectroscopic method was used to determine the local water and protein content in human lenses. In 18 lenses of varying age position-defined water/protein content measurements were carried out along the visual and the equatorial axis.\ud ...
Greve, J.   +3 more
core   +3 more sources

Refraction during incipient presbyopia: The Aston Longitudinal Assessment of Presbyopia (ALAP) study

open access: yesJournal of Optometry, 2018
Purpose: To investigate non-cycloplegic changes in refractive error prior to the onset of presbyopia. Methods: The Aston Longitudinal Assessment of Presbyopia (ALAP) study is a prospective 2.5 year longitudinal study, measuring objective refractive error
Deborah S. Laughton   +2 more
doaj   +1 more source

Positional accommodative intraocular lens power error induced by the estimation of the corneal power and the effective lens position [PDF]

open access: yes, 2015
Purpose: To evaluate the predictability of the refractive correction achieved with a positional accommodating intraocular lenses (IOL) and to develop a potential optimization of it by minimizing the error associated with the keratometric estimation of ...
Camps, Vicente J.   +4 more
core   +4 more sources

Determinants of high unmet need for presbyopia correction: a community-based study in northwest Ethiopia

open access: yesClinical Optometry, 2017
Mikael Girum,1 Alemayehu Desalegn Gudeta,2 Destaye Shiferaw Alemu2 1Department of Ophthalmology and Optometry, College of Medicine and Health Science, Hawassa University, Awasa, 2Department of Optometry, College of Medicine and Health Sciences ...
Girum M   +2 more
doaj  

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