Wide field-of-view bifocal eyeglasses

Sergio Barbero; Jacob Rubinstein

doi:10.1117/12.2184596

23 September 2015 Wide field-of-view bifocal eyeglasses

Sergio Barbero, Jacob Rubinstein

Proceedings Volume 9626, Optical Systems Design 2015: Optical Design and Engineering VI; 962614 (2015) https://doi.org/10.1117/12.2184596
Event: SPIE Optical Systems Design, 2015, Jena, Germany

Abstract

When vision is affected simultaneously by presbyopia and myopia or hyperopia, a solution based on eyeglasses implies a surface with either segmented focal regions (e.g. bifocal lenses) or a progressive addition profile (PALs). However, both options have the drawback of reducing the field-of-view for each power position, which restricts the natural eye-head movements of the wearer. To avoid this serious limitation we propose a new solution which is essentially a bifocal power-adjustable optical design ensuring a wide field-of-view for every viewing distance. The optical system is based on the Alvarez principle. Spherical refraction correction is considered for different eccentric gaze directions covering a field-of-view range up to 45degrees. Eye movements during convergence for near objects are included. We designed three bifocal systems. The first one provides 3 D for far vision (myopic eye) and -1 D for near vision (+2 D Addition). The second one provides a +3 D addition with 3 D for far vision. Finally the last system is an example of reading glasses with +1 D power Addition.

Citation Download Citation

Sergio Barbero and Jacob Rubinstein "Wide field-of-view bifocal eyeglasses", Proc. SPIE 9626, Optical Systems Design 2015: Optical Design and Engineering VI, 962614 (23 September 2015); https://doi.org/10.1117/12.2184596

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