Results 281 to 290 of about 107,423 (339)
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Journal of the Optical Society of America, 1981
The spectral dispersions of rabbit, rat, pigeon, and human crystalline lens material have been measured with a Pulfrich refractometer. The refractive indices all increase rapidly at the violet end of the spectrum so tat the chromatic aberrations of the eyes of these species cannot be derived adequately from Cornu's formula, as had previously been ...
D A, Palmer, J, Sivak
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The spectral dispersions of rabbit, rat, pigeon, and human crystalline lens material have been measured with a Pulfrich refractometer. The refractive indices all increase rapidly at the violet end of the spectrum so tat the chromatic aberrations of the eyes of these species cannot be derived adequately from Cornu's formula, as had previously been ...
D A, Palmer, J, Sivak
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Crystalline Lens Power in Myopia
Optometry and Vision Science, 1992Growth of the eye shows a coordinated pattern whereby the reduction in refractive power of the cornea and crystalline lens tends to reduce the myopia that would otherwise result from the normal increase in axial length. There is some controversy as to whether the reduction in crystalline lens power is influenced by the refractive state of the eye, i.e.,
L F, Garner, M, Yap, R, Scott
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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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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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