Results 261 to 270 of about 31,207 (305)
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Ontogeny of human lens crystallins
Experimental Eye Research, 1985The soluble proteins from prenatal and neonatal human lenses were fractionated by gel filtration into four distinct size classes viz. high molecular weight alpha-crystallin (HM-alpha), alpha-crystallin, intermediate molecular weight (IMW) proteins and low molecular weight (LMW) proteins.
J A, Thomson, R C, Augusteyn
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Management of the subluxated crystalline lens
Journal of Cataract and Refractive Surgery, 2013The surgical management of ectopia lentis presents the ophthalmic surgeon with numerous challenges and options. From the clinical evaluation to the surgical approach, ectopia lentis patients require additional methodologies, techniques, and devices to ensure the best possible outcome.
Richard S, Hoffman +5 more
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Analysis of crystalline lens position
Journal of Cataract and Refractive Surgery, 2006To study normal crystalline lens position to provide a comparative baseline for future studies of crystalline lens or intraocular lens shift.Taipei Municipal Yang-Ming Hospital, Taipei, Taiwan.A Scheimpflug anterior segment analyzer (EAS-1000, Nidek) was prospectively applied to measure the cycloplegic crystalline lens position in subjects who had not ...
Chao-Yu, Hu +3 more
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In Vivo Photomicrography of the Crystalline Lens
Archives of Ophthalmology, 1981We describe a technique and apparatus for observing and photographing the crystalline lens in vivo and in the enucleated eye. Magnifications of x25 to x100 are easily obtainable on the film plane. The method is suitable for diagnostic observation and clinical research on cataract formation and prevention in humans, as well as for animal experimentation
R A, Laing, S E, Bursell
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Crystalline lens parameters in infancy
Ophthalmic and Physiological Optics, 1996Summary Despite the importance of lens power to ocular development, few data are available regarding infant crystalline lens parameters. Lens and corneal radii of curvature were measured in the horizontal meridian using a video‐based keratophakometer, and refractive error was measured by cycloplegic retinoscopy in
I C, Wood, D O, Mutti, K, Zadnik
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Spherical aberration of the crystalline lens
Vision Research, 1983Split beams of varying separations from a helium-neon laser were directed through the crystalline lenses of a number of vertebrates. Photographs of the focal effects indicate the extent to which the refractive index variation of the lens and lens shape control spherical aberration.
J G, Sivak, R O, Kreuzer
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Optical Density of the Crystalline Lens
Optometry and Vision Science, 1982Abstract The optical density for the noncataractous crystalline lens is written as a sum of two terms, each with a specific dependence on wavelength. The first term, proportional to 1/λ 2 , represents all light‐scattering processes in the lens.
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Hydration properties of lens crystallins
Experimental Eye Research, 1990The water binding properties of bovine lens crystallins, alpha, beta H, beta L and low molecular weight (LMW), were investigated with different techniques. The water sorptive capacity was obtained in high vacuum sorption experiments volumetrically, and also gravimetrically in controlled atmosphere experiments.
F A, Bettelheim, N, Popdimitrova
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Crystalline lens and refractive development
Progress in Retinal and Eye Research, 2015Individual refractive errors usually change along lifespan. Most children are hyperopic in early life. This hyperopia is usually lost during growth years, leading to emmetropia in adults, but myopia also develops in children during school years or during early adult life. Those subjects who remain emmetropic are prone to have hyperopic shifts in middle
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Luxation of the Crystalline Lens in the Dog*
Journal of Small Animal Practice, 1969SUMMARYLuxation of the crystalline lens is a heritable defect in the dog and is virtually confined to a small group of terrier breeds.The condition is usually bilateral, although both eyes are not necessarily affected simultaneously. The lens may subluxate or dislocate, usually into the anterior chamber.Secondary glaucoma follows and leads to ...
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