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Biomedical subjects

N J Weiss

Publications and source records attributed to N J Weiss.

9 recordsLinked to original sources

Low vision management of retinitis pigmentosa.

The low vision treatment of patients with retinitis pigmentosa (RP) has evolved through an understanding of the needs of the patient with extreme peripheral field constriction. Patient care involves four main areas: 1) best refraction and simple magnification, including the possibility of electronic type magnification for reading; 2) control of glare and determination of the proper illumination for reading and mobility; 3) use of field enhancement procedures for sighting and for mobility, including the understanding of cane travel and scanning techniques; 4) additional counseling and ancillary care. Through the methods described, patients who might have been poor prospects for low vision care 15 or 20 years ago, may now be able to function at much higher levels.

Eyeglasses↗

An unusual application of prisms for field enhancement.

This case report describes an unusual procedure to alleviate the problem of walking for a patient who has a modified "doughnut" field or ring scotoma. The technique uses prisms for field enhancement to increase the peripheral field awareness for the purpose of mobility. The unconventional placement of the prisms on the carrier lens contributes to the unusual nature of this case.

Blindness↗

Limits of zeroes of recursively defined polynomials.

Let {P(n)(z)} be a sequence of polynomials satisfying a linear homogeneous recursion whose coefficients are polynomials in z. Necessary and sufficient conditions are found, subject to mild nondegeneracy conditions, that a number x be a limit of zeroes of {P(n)} in the sense that there is a sequence {z(n)} with P(n)(z(n)) = 0, z(n)-->x. An application is given to a family of polynomials arising in a map-coloring problem.

Journal Article↗

Multipliers on compact lie groups.

Sufficient conditions are found for a biinvariant operator on a compact Lie group to be bounded on L(p), 1 < p < infinity. The proof uses properties of g-functions on such a group, and an analog to the familiar relationship between differentiation and multiplication under the Fourier transform.

Journal Article↗