The eye in focus: 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...
متن کاملAccommodation and presbyopia.
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...
متن کاملNew concepts in accommodation and presbyopia
The authors conducted a review of classical and conflicting theories of accommodation and presbyopia. They make a critical comparison with the findings of magnetic resonance imaging (MRI) that have been developed in recent decades. Based on these studies, formulates a new approach on the subject, shifting the focus of the discussion of the lens to the posterior pole of the eye.
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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 ...
متن کاملDynamic aspects of accommodation: age and presbyopia
Dear Editor Mordi and Ciuffreda (2004) have used an objective infrared optometer to measure the dynamic aspects of accommodation with aging in a large well-designed study. Their study demonstrates no change in the time constant and peak velocity/amplitude of accommodation with age. Based upon this observation, the authors correctly conclude that their findings imply that presbyopia cannot be du...
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ژورنال
عنوان ژورنال: Clinical and Experimental Optometry
سال: 2008
ISSN: 0816-4622,1444-0938
DOI: 10.1111/j.1444-0938.2008.00256.x