Ophthalmic no-line progressive addition lenses

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks

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G02C 706

Patent

active

059108320

ABSTRACT:
Ophthalmic no-line progressive addition lenses for spectacles are provided with increased sizes of usable intermediate and near addition zones. A preferred lens of the present invention comprises a distance zone, one or more intermediate addition zones and a near add zone wherein each of the zones has a generally spherical base curve. The intermediate and near addition zones are combined with the distance zone by connecting wedges which have aspheric base curves. An aspheric fringe is used to flatten the peripheral area of the bottom portion of the lens, thereby providing a thin and cosmetically acceptable lens.

REFERENCES:
patent: 2869422 (1959-01-01), Cretin-Maitenaz
patent: 4274717 (1981-06-01), Davenport
patent: 4484804 (1984-11-01), Mignen
patent: 4676610 (1987-06-01), Barken et al.
patent: 4729651 (1988-03-01), Kitani
patent: 4838675 (1989-06-01), Barkan et al.
patent: 4955712 (1990-09-01), Barth et al.
patent: 4988182 (1991-01-01), Takahashi et al.
patent: 5166711 (1992-11-01), Portney
patent: 5235359 (1993-08-01), Chauveau et al.
patent: 5245366 (1993-09-01), Szochak
patent: 5270745 (1993-12-01), Pedrono
patent: 5272495 (1993-12-01), Pedrono
patent: 5446508 (1995-08-01), Kitchen
patent: 5517259 (1996-05-01), Blum et al.
patent: 5517260 (1996-05-01), Glady et al.
patent: 5691797 (1997-11-01), Seidner et al.
James E. Sheedy et al., "Optics of Progressive Addition Lenses", American Journal of Optometry & Physiological Optics, vol. 64, No. 2, Feb. 1987, pp. 90-99.
George K. Lee, "Fine Tune Your Understanding of PAL Designs", Review of Optometry, Jan. 15, 1995, pp. 69-70 and 76.
John K. Davis, "Aspheric Lenses: What's Possible--And What Isn't", Review of Optometry, May, 1978, pp. 68-74.
Irvin M. Borish et al., "Double masked study of progressive addition lenses", Journal of the American Optometric Association, vol. 51, No. 10, Oct., 1980, pp. 933-943.
James E. Sheedy et al., "Vertical Yoked Prism--Patient Acceptance and Postural Adjustment", Ophthal. Physiol. Opt., vol. 7, No. 3, 1987, pp. 255-257. Please note p. 256 is missing and will be provided if it becomes available to applicant.

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