Results 111 to 120 of about 165,986 (168)

A Case of Vertical Diplopia after Thalamic Deep Brain Stimulation for Essential Tremor. [PDF]

Mov Disord Clin Pract
Far R, Subramaniam S, Aquino C, Girgis F.   +3 more
europepmc   +1 more source

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Fresnel Prism Use Among Orthoptists

American Orthoptic Journal, 2014
To better understand current uses of Fresnel prisms.A seventeen-question survey was completed by members of the American Association of Certified Orthoptists (AACO).Surveys were emailed to 211 orthoptists with a 36% response rate (n = 76). Prisms are used preoperatively to determine the surgical angle for 72% of respondents, 94% use prisms for ...
Terra, Haller, Bruce A, Furr
exaly   +4 more sources

The fresnel prism as polarization interferometer

Microwave and Optical Technology Letters, 1993
AbstractHere we show that a Fresnel prism can be used as a polarization interferometer. A linearly polarized beam, which is incident in this interferometer, is split into two circularly polarized beams, one right and another left, which generate the interference pattern. Interposing a solution of common sugar in the incident beam, the former pattern is
R. Echarri
exaly   +3 more sources

Space-Time Fresnel Prism for Practical Dynamic Systems

Metamaterials, 2023
This paper presents the concept of a space-time Fresnel prism, a space-time version of the conventional Fresnel prism. This prism emulates the operation of a space-time interface, the building brick of any modulation-based space-time metamaterial, while ...
Christophe Caloz, Xikui Ma, Zhiyu Li
exaly   +2 more sources

Fresnel Prism Membrane in Acquired Extraocular Muscle Palsy

American Orthoptic Journal, 1974
S. Véronneau-Troutman
exaly   +4 more sources

Effects of Fresnel prism glasses on balance and gait in stroke patients with hemiplegia: A randomized controlled trial pilot study

Technology and Health Care, 2020
BACKGROUND: Fresnel prism shifts the field of view and converts object position in space, but its effect on stroke patients without unilateral neglect has not been examined.
Yun-Hee Sung, Sung Yun-Hee, Sun-Young Ha   +2 more
exaly   +2 more sources

Fresnel Prism Therapy for Right Hemianopia

American journal of optometry and physiological optic, 1983
ABSTRACT Fresnel prisms placed on the spectacle lenses of a patient with right hemianopia provide an easier means for the patient to become aware of objects located in the blind field. Exact location of the prisms is important.
G C, Woo, T, Mandelman
openaire   +3 more sources

FRESNEL PRISM CORRECTION FOR TRAUMA‐INDUCED DIPLOPIA

Ophthalmic and Physiological Optics, 1985
Abstract— Fresnel prisms placed on the spectacle lenses of a patient with optic atrophy resulting from an accident eliminated constant diplopia in the remaining visual field. A reduction in vision due to Fresnel prisms was found to be more tolerable than diplopia.
G C, Woo, J V, Lovasik
semanticscholar   +4 more sources

EFFECT OF FRESNEL PRISM DISPERSION ON CONTRAST SENSITIVITY FUNCTION*

Ophthalmic and Physiological Optics, 1986
Abstract— Fresnel prisms are often used in orthoptics for binocular anomalies and in low vision for visual field defects. These prisms are made of optical polyvinyl chloride (PVC) and this material increases chromatic dispersion and produces a loss of contrast.
G C, Woo, F W, Campbell, B, Ing
openaire   +3 more sources

A FRESNEL PRISM BAR FOR HOME VISUAL THERAPY

Optometry and Vision Science, 1974
ABSTRACT Fabrication of an inexpensive, easy‐to‐use prism bar using Fresnel Press‐on TM prisms is discussed.
B. Wick
openaire   +3 more sources