Hyperelastic modelling of the crystalline lens: Accommodation and presbyopia
نویسندگان
چکیده
منابع مشابه
Accommodation and presbyopia in the human eye. Changes in the anterior segment and crystalline lens with focus.
PURPOSE To characterize changes in the sagittal dimensions of the human crystalline lens and anterior segment as a function of accommodation, to determine the potential age dependence of these changes, and to evaluate these changes in relation to the development of presbyopia. METHODS Scheimpflug slit-lamp photography, as well as a variety of standard ophthalmologic methods, was used to colle...
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Accommodation is a dioptric change in power of the eye that occurs to allow near objects to be focused on the retina. The ability to accommodate is lost with increasing age in humans and monkeys. This phenomenon, called presbyopia, is the most common human ocular affliction, and its pathophysiology remains uncertain. The progressive loss of human accommodative amplitude begins early in life and...
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This study expands on a geometric model of ocular accommodation (Reilly and Ravi, Vision Res. 50:330-336; 2010) by relaxing assumptions regarding lens symmetry about the equator. A method for predicting stretching force was derived. Two models were then developed: Model 1 held the equatorial geometry constant at all stages of accommodation, while Model 2 allowed localized deformation at the equ...
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“It is undoubtedly the final frontier of cataract and refractive surgery.There is great interest and excitement in this field of research at the moment and we are seeing some very interesting approaches coming on stream which hold great promise for future treatment of presbyopia,” said David Spalton FRCS, FRCOphth, who co-chaired the symposium. Dr Spalton said it was important to remember that ...
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ژورنال
عنوان ژورنال: Journal of Optometry
سال: 2012
ISSN: 1888-4296
DOI: 10.1016/j.optom.2012.05.006