Results 261 to 270 of about 1,280,003 (288)

A-scan/keratometry post-op refraction

American Intra-Ocular Implant Society Journal, 1981
The sometimes difficult and tedious process of postoperative refraction can be significantly simplified for both patient and physician by the combined use of postoperative A-scan/keratometry, the labeled intraocular lens (IOL) power, and Richard D. Binkhorst's Texas Instruments' TI-59 Program IV, Computer Refraction in Aphakia-A rtiphakia. 1 The result
R A, Banfiel, S L, Pallin, G B, Walman
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Rhinoscleroma: a Scanning Electron-Microscopic Study

ORL, 1976
Nasal biopsies from 6 patients with rhinoscleroma were studied by scanning electron microscopy. Numerous bacilli of different sizes were found on the epithelial surface. Few bacilli with thin spiral terminal cilia were seen over the surface of large protruding non-epithelial cells. These cells appeared to be the Mikulicz cells migrating from the tunica
H, Gaafar, Y, Harada
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Reflectometry with a scanning laser ophthalmoscope

Applied Optics, 1992
We describe noninvasive techniques to optimize reflectometry measurements, particularly retinal densitometry, which measures the photopigment density difference. With these techniques unwanted scattered light is greatly reduced, and the retina is visualized during measurements.
A E, Elsner, S A, Burns, G W, Hughes, R H, Webb   +3 more
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A scanning UV photoemission microscope

Journal of Electron Spectroscopy and Related Phenomena, 1992
Abstract The use of a Fresnel zone plate and He(I) discharge to produce a 5 μm UV photon microprobe suitable for use in scanning photoelectron microscopy is described. The performance of a prototype microscope using total electron yield detection is shown to be in good agreement with theoretical considerations.
A.W. Potts, S. Anjum, R.E. Burge, A.D. Tournas, A. Yacoot   +4 more
openaire   +1 more source

A scanning, recording and integrating microinterferometer

Histochemie, 1970
The instrument is primarily intended for the determination of dry weight of biological objects through measurement of the optical path difference (o.p.d.). This is accomplished with the aid of a shearing interference microscope and a servo driven analyzer.
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A-scan echoencephalography.

Canadian Medical Association journal, 1966
The technique of A-scan echoencephalography is criticized in so far as it lacks objectivity and reproducibility. In the author's laboratory, the M-echo, being of higher amplitude than other intracranial echoes, is distinguished from other echoes by an averaging technique-a time exposure.
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Is a Scanning Ion Microscope Feasible?

Science, 1973
Atomic collisions of high-energy heavy ions produce large yields of x-rays. The small de Broglie wavelength of massive ions leads to an estimate of 0.2 angstrom for the resolution of a microscope utilizing nitrogen ions with energies of 14 million electron volts.
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Infrared interferometer with a scanned aperture

Applied Optics, 1975
A Twyman-Green interferometer operating at a 3.39-microm wavelength has been built in which the collimator aperture was scanned by a laser beam. The scanning was produced by reflecting the laser beam from a mirror supported by four piezoelectric elements and oscillated about two orthogonal axes.
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Ophthalmic ultrasonography: A-scans.

Journal of ophthalmic nursing & technology, 1990
Ophthalmic ultrasound measures and visualizes the posterior pole; an A-scan produces a one dimensional display and the B-scan is two dimensional. A-scan measurements are indicated prior to cataract surgery because of their accuracy and repeatability. It measures the length of the eye along the visual axis from the cornea to the retina.
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A Scanning Pupillometer

American Journal of Ophthalmology, 1959
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