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Proceedings Paper

Astrabismatic spectacles: a medical application for binary optics
Author(s): Michael Holz
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Paper Abstract

Spectacles have been designed for correcting the double vision associated with various forms of strabismus (`squint'). These correctors consist of light-weight, refracting Fresnel wedge prisms that can bend the optic axis by large deviations, while maintaining a relatively thin profile. Using a special mold structure, compatible with cost-effective production, a continuously variable range of prism angles can be pressed in suitable substrates, such as polycarbonate. The flat surface of the prism is embossed with a binary optics diffraction grating for compensating the prism's inherent color dispersion. Over a wide range of deviation angles, the Fresnel prism combined with the right grating achieves uniformly excellent quality of the perceived image, well suited for ophthalmological applications.

Paper Details

Date Published: 13 January 1993
PDF: 10 pages
Proc. SPIE 1751, Miniature and Micro-Optics: Fabrication and System Applications II, (13 January 1993); doi: 10.1117/12.138871
Show Author Affiliations
Michael Holz, Lincoln Lab./MIT (United States)


Published in SPIE Proceedings Vol. 1751:
Miniature and Micro-Optics: Fabrication and System Applications II
Chandrasekhar Roychoudhuri; Wilfrid B. Veldkamp, Editor(s)

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