Results 211 to 220 of about 27,357 (246)
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Traumatic subconjunctival crystalline lens dislocation
Journal of Cataract and Refractive Surgery, 2003To evaluate the clinical features and visual outcomes in patients with traumatic subconjunctival crystalline lens dislocation.Izmir Atatürk Education and Research Hospital, Department of Ophthalmology, Izmir, Turkey.The clinical records of 5 patients with subconjunctival crystalline lens dislocation secondary to blunt trauma were reviewed.The median ...
Nazife Sefi, Yurdakul +3 more
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2014
The human crystalline lens is the second most important refracting element of the eye. The lens functions primarily in accommodative vision. The lens doubles in volume between birth and age 70. Approximately at age 40, the lens loses its ability to accommodate because of loss of pliability, and at age 70 the transparency of the lens is reduced ...
J. Douglas Cameron, Dejan M. Rašić
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The human crystalline lens is the second most important refracting element of the eye. The lens functions primarily in accommodative vision. The lens doubles in volume between birth and age 70. Approximately at age 40, the lens loses its ability to accommodate because of loss of pliability, and at age 70 the transparency of the lens is reduced ...
J. Douglas Cameron, Dejan M. Rašić
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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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2002
The eye is the main organ for sensing light, and its design is optimized for capturing light and forming images. The eye is, in many respects, like a camera. The optical system of the eye forms an image on the retina, whereas the camera lens forms its image on film. The camera must be focused by changing the distance from the lens to the film. However,
Carlos Gomez-Reino +2 more
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The eye is the main organ for sensing light, and its design is optimized for capturing light and forming images. The eye is, in many respects, like a camera. The optical system of the eye forms an image on the retina, whereas the camera lens forms its image on film. The camera must be focused by changing the distance from the lens to the film. However,
Carlos Gomez-Reino +2 more
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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 parameters in infancy
Ophthalmic and Physiological Optics, 1996SummaryDespite 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 19 out of 27 infants ranging in age ...
I C, Wood, D O, Mutti, K, Zadnik
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Ophthalmology clinics of North America, 2006
If presbyopia is caused by hardening of the crystalline lens, replacing it with a material with mechanical properties similar to the young crystalline lens should restore accommodative ability. Such a silicone material has been developed. Refilling the capsular bag with this material results in 3 to 5 D of accommodation in primates in response to ...
Norrby, S., Koopmans, S., Terwee, T.
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If presbyopia is caused by hardening of the crystalline lens, replacing it with a material with mechanical properties similar to the young crystalline lens should restore accommodative ability. Such a silicone material has been developed. Refilling the capsular bag with this material results in 3 to 5 D of accommodation in primates in response to ...
Norrby, S., Koopmans, S., Terwee, T.
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Mass Spectrometry of Lens Crystallins: Bovine β-Crystallins
Rapid Communications in Mass Spectrometry, 1996The bovine beta-crystallins have been isolated by gel permeation chromatography (GPC) and fast protein liquid chromatography (FPLC). Electrospray ionization mass spectrometric examination of the resulting fractions confirms the relative molecular masses of three bovine beta-crystallins, i.e. beta B1, beta B2 and beta A2, only one of which (beta B2) has
G W, Kilby +3 more
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Crystalline lens alterations in congenital aniridia
Archivos de la Sociedad Española de Oftalmología (English Edition), 2021Congenital aniridia is a rare genetic disease associated with mutations in the PAX6 gene. Changes in the lens in aniridia can be alterations of size and shape, of position - which generally reveal zonular weakness and determines subluxation of the lens - and mainly changes in transparency, cataracts, with variable morphology of polar, cortical ...
F, D'Oria, R, Barraquer, J L, Alio
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A Model for Crystalline Lens Accommodation
Comprehensive Therapy, 2003When a slight equatorial pull is applied to the crystalline lens, the center thickens, the central surfaces steepen, and the optical power increases. These findings are consistent with Schachar's theory of accommodation.
Chang-Hai M, Chien +2 more
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