Results 131 to 140 of about 165,986 (168)
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The Therapeutic Scope of the Fresnel Press-On Prism: Three Interesting Cases
American Orthoptic Journal, 1975exaly +3 more sources
Fresnel vs. Conventional Prisms
American journal of optometry and physiological optic, 1988ABSTRACT Among the inherent optical aberrations found in conventional crown glass or resin prisms is the property known as nonuniform relative magnification. Prisms, by definition, displace an image by a given amount. However, the final size of the image is nonuniform, being relatively larger toward the apex than toward the base of ...
S M, Brunnett +2 more
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Journal of clinical neuro-ophthalmology, 1983
Patients with homonymous hemianopic visual field defects have been treated by using a 30-diopter Fresnel plastic paste-on prism on their glasses. A patient with a left homonymous hemianopia, for instance, can have a 30-diopter base left (i.e., base out) Fresnel prism placed on the temporal half of the left spectacle lens.
J L, Smith, I G, Weiner, A J, Lucero
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Patients with homonymous hemianopic visual field defects have been treated by using a 30-diopter Fresnel plastic paste-on prism on their glasses. A patient with a left homonymous hemianopia, for instance, can have a 30-diopter base left (i.e., base out) Fresnel prism placed on the temporal half of the left spectacle lens.
J L, Smith, I G, Weiner, A J, Lucero
openaire +1 more source
Three-wavelength and common-path quantitative phase microscopy using a Fresnel bi-prism
Journal of Modern OpticsThis paper aims to present a three-wavelength phase microscopy method for single-shot measurement of the dispersion of a single-mode optical fibre. To achieve this, each wavelength was divided into two beams using Fresnel bi-prism and finally, six beams ...
Helia Abdolrezaei, M. Jafarfard
semanticscholar +1 more source
Optical Engineering: The Journal of SPIE
. Prism coupling refractometry, a versatile and well-characterized technique, is a valuable tool for measuring the refractive index of transparent media in film or bulk forms.
A. Howe +3 more
semanticscholar +1 more source
. Prism coupling refractometry, a versatile and well-characterized technique, is a valuable tool for measuring the refractive index of transparent media in film or bulk forms.
A. Howe +3 more
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Comparison of the visual effects of Fresnel prisms in normal and amblyopic eyes
Journal of American Association for Pediatric Ophthalmology and Strabismus, 2008To assess the effects of Fresnel prisms on visual acuity and peak contrast sensitivity in the amblyopic and sound eyes of participants with amblyopia and to determine whether these functions were affected by Fresnel prisms to a different degree than those of controls.The LogMAR visual acuity and peak contrast sensitivity of 10 unilateral amblyopic ...
David, Wright +2 more
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Visual performance and optical properties of Fresnel membrane prisms.
American journal of optometry and archives of American Academy of Optometry, 1971The Fresnel prism, an outgrowth of the early nineteenth century lenses designed for lightâhouses by Augustin J. Fresnel, can be imagined as a series of small prisms lying adjacent to each other on a thin transparent platform.
A J, Adams, R J, Kapash, E, Barkan
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Fresnel membrane prisms: clinical experience.
Canadian journal of ophthalmology. Journal canadien d'ophtalmologie, 2000There are few published reports on the clinical application of Fresnel membrane prisms in the treatment of diplopia in adults. The authors describe the use of these prisms in patients with fourth and sixth cranial nerve palsies, restrictive motility caused by thyroid-related orbital disease, and convergence insufficiency.Of 209 patients who had been ...
M, Flanders, N, Sarkis
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Application of fresnel prism in patients with different types of binocular diplopia
, 2021W. Lao +4 more
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A Fresnel bi-prism device for atomic matter waves
Optics Communications, 1997Abstract The principle of a simple bi-prism for coherent atomic translational waves is studied. The scheme of the experiment consists of a diffracting slit, in front of which the evanescent wave running along a tapered optical fibre provides a converging gradient of optical potential for two-level atoms.
R. Brouri +6 more
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