Results 211 to 220 of about 470,741 (269)
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Refractive lens exchange with a multifocal intraocular lens
Current Opinion in Ophthalmology, 2003Refractive lens exchange with a multifocal intraocular lens is becoming a more popular method of refractive surgery in the presbyopic patient. The limitations of keratorefractive surgery have led to a resurgence of lens exchange surgery for patients with prescriptions outside the limits of corneal refractive procedures, in addition to patients with ...
Richard S, Hoffman +2 more
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Zoom Lens with Aspherical Lens for Camcorder
International Lens Design, 1990Recent optical systems consist of spherical lens elements, because the spherical lens is suited for productin and the surface inspection. But now as the precision production and mass production technologies are developed, there are many lens systems with aspherical lens elements for still camera and projection TV.
Masahiko Yatsu +2 more
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The Lens Capsule and the Intraocular Lens-the ‘Moustache Lens’
European Journal of Implant and Refractive Surgery, 1989The use of the capsular bag for fixation of intraocular lenses is described. In routine cases, the ‘moustache principle’ of lenses is easy, safe and guaranteed. The envelope technique, or intercapsular surgery, is described. In traumatic cases, the two-plane two-loop or four-loop lenses are advised as an adequate alternative.
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Ophthalmologica, 2000
The human lens grows by a process of epithelial cell division at its equator and the formation of generations of differentiated fibre cells. Despite the process of continuous remodelling necessary to achieve growth within a closed system, the lens can retain a high level of light transmission throughout the lifetime of the individual, with the ability ...
A J, Bron +4 more
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The human lens grows by a process of epithelial cell division at its equator and the formation of generations of differentiated fibre cells. Despite the process of continuous remodelling necessary to achieve growth within a closed system, the lens can retain a high level of light transmission throughout the lifetime of the individual, with the ability ...
A J, Bron +4 more
openaire +2 more sources
Journal of Cellular Biochemistry, 2003
AbstractParalemmin was identified in the chicken lens as a protein with mol. wt 65 kDa and a splice variant of 60 kDa, both soluble in Triton X‐100. Paralemmin is localized to the plasma membrane of fiber cells, and was not detected in the annular pad cells. Thus in the chick lens it is another feature of fiber cell differentiation. Its localization to
M, Bagchi, M, Katar, W-K, Lo, H, Maisel
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AbstractParalemmin was identified in the chicken lens as a protein with mol. wt 65 kDa and a splice variant of 60 kDa, both soluble in Triton X‐100. Paralemmin is localized to the plasma membrane of fiber cells, and was not detected in the annular pad cells. Thus in the chick lens it is another feature of fiber cell differentiation. Its localization to
M, Bagchi, M, Katar, W-K, Lo, H, Maisel
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Presence: Teleoperators and Virtual Environments, 1998
We describe a new type of feedback display based upon ocular accommodation, called the virtual lens, that maintains a focused projection of a CRT image on the retina independent of changes in accommodation, and that replaces the optical image-processing action of the crystalline lens with an arbitrary computable image transform.
Charles F. Neveu, Lawrence W. Stark
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We describe a new type of feedback display based upon ocular accommodation, called the virtual lens, that maintains a focused projection of a CRT image on the retina independent of changes in accommodation, and that replaces the optical image-processing action of the crystalline lens with an arbitrary computable image transform.
Charles F. Neveu, Lawrence W. Stark
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Der Ophthalmologe, 2010
Cataract surgery has developed into a very safe and highly reproducible procedure but the ultimate goal to also restore physiological accommodation has not yet been achieved. A variety of accommodative intraocular lenses (IOLs) and surgical techniques have been suggested to cure presbyopia but all showed only poor accommodative effects by objective ...
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Cataract surgery has developed into a very safe and highly reproducible procedure but the ultimate goal to also restore physiological accommodation has not yet been achieved. A variety of accommodative intraocular lenses (IOLs) and surgical techniques have been suggested to cure presbyopia but all showed only poor accommodative effects by objective ...
openaire +2 more sources
Archives of Ophthalmology, 1951
WITHIN the last year many reports have appeared evidencing noteworthy progress in the investigations of the fundamental problems of the composition and metabolism of the lens and vitreous humor. Efforts were made to solve the problems of the etiology, prophylaxis and treatment of retrolental fibroplasia.
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WITHIN the last year many reports have appeared evidencing noteworthy progress in the investigations of the fundamental problems of the composition and metabolism of the lens and vitreous humor. Efforts were made to solve the problems of the etiology, prophylaxis and treatment of retrolental fibroplasia.
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Archives of Ophthalmology, 1959
It would seem that the lens is the ideal organ for transplantation because it is avascular and its antigen is contained in a membrane which probably does not allow protein molecules to pass. As long as the capsule is not damaged by the procedure, sensitization of the host is unlikely and consequently clear homo- and heterografts are to be expected ...
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It would seem that the lens is the ideal organ for transplantation because it is avascular and its antigen is contained in a membrane which probably does not allow protein molecules to pass. As long as the capsule is not damaged by the procedure, sensitization of the host is unlikely and consequently clear homo- and heterografts are to be expected ...
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Archives of Ophthalmology, 1962
Crystal formation in the lens in both the young and the aged has been reported by various observers from time to time. The morphology and the chemical nature of the crystals are also of varied nature; for example, Goulden12and other observers have described crystalline opacities in the lens showing green and blue iridescence in morbid conditions such ...
B M, CHATTERJEE, M J, MUKHERJI, P B, SEN
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Crystal formation in the lens in both the young and the aged has been reported by various observers from time to time. The morphology and the chemical nature of the crystals are also of varied nature; for example, Goulden12and other observers have described crystalline opacities in the lens showing green and blue iridescence in morbid conditions such ...
B M, CHATTERJEE, M J, MUKHERJI, P B, SEN
openaire +2 more sources