Results 31 to 40 of about 1,205,276 (280)

A combined FEG-SEM and TEM study of silicon nanodot assembly [PDF]

open access: yes, 2008
Nanodots forming dense assembly on a substrate are difficult to characterize in terms of size, density, morphology and cristallinity. The present study shows how valuable information can be obtained by a combination of electron microscopy techniques.
B. Caussat   +14 more
core   +3 more sources

DEVELOPMENTAL DEFORMITIES OF THE CRYSTALLINE LENS. [PDF]

open access: yesJournal of the American Medical Association, 1908
In the observation brought forward in this paper I propose to show how several forms of congenital cataract are the outcome of arrests of development in the lens at different stages in its formation. I am, naturally, aware that to attribute a condition to an arrest of development offers only a partial explanation of its etiology, leaving the cause of ...
openaire   +2 more sources

Simultaneously imaging and quantifying in vivo mechanical properties of crystalline lens and cornea using optical coherence elastography with acoustic radiation force excitation

open access: yesAPL Photonics, 2019
The crystalline lens and cornea comprise the eye’s optical system for focusing light in human vision. The changes in biomechanical properties of the lens and cornea are closely associated with common diseases, including presbyopia and cataract. Currently,
Yan Li   +8 more
semanticscholar   +1 more source

Torque-operated gradient-index axicon

open access: yes, 2013
We describe a gradient-index axicon based on twisting of crystals. We demonstrate that the focal length of the axicon can be efficiently operated by the torsion moment.
Skab, Ihor   +3 more
core   +1 more source

AN UNUSUAL LUXATION OF THE CRYSTALLINE LENS. [PDF]

open access: yesJournal of the American Medical Association, 1888
The position of the luxated lens, and the circumstances attending its displacement are unusual, and hence it seems worthy of recording. On the 14th of June last C. D., a boy of twelve years of age, was brought to me with the following history: About three weeks ago the right eye became sore, the left following in turn a week later.
openaire   +2 more sources

An eye-adapted beamforming for axial B-scans free from crystalline lens aberration : In vitro and ex vivo results with a 20 MHz linear array [PDF]

open access: yes, 2015
Congrès sous l’égide de la Société Française de Génie Biologique et Médical (SFGBM)International audienceIn ophtalmic ultrasonography, axial B-scans are seriously deteriorated owing to the presence of the crystalline lens. This strongly aberrating medium
Matéo, Tony   +2 more
core   +1 more source

The Mid-Infrared Spectrum of the Zodiacal and Exozodiacal Light [PDF]

open access: yes, 2003
The zodiacal light is the dominant source of the mid-infrared sky brightness seen from Earth, and exozodiacal light is the dominant emission from planetary and debris systems around other stars.
Boulanger, Franccois   +3 more
core   +3 more sources

THE DISAPPEARANCE OF OPACITIES OF THE CRYSTALLINE LENS. [PDF]

open access: yesJAMA: The Journal of the American Medical Association, 1902
SPONTANEOUS DISAPPEARANCE OF SENILE CATARACT. In 1900 I reported13an interesting case of this nature in a man of 73, who had marked senile changes in his circulatory system as well as prominent muscular and nervous symptoms. Several months before his first visit to me he had an attack, which was at first diagnosed as apoplexy, but later was judged ...
openaire   +3 more sources

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