Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1992-03-18
1994-01-11
Arnold, Bruce Y.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
351234, A61B 302
Patent
active
052785939
ABSTRACT:
An ophthalmic dial advancement system for vision testing apparatuses, such as ophthalmic refractors of the type which utilize a single dial sphere control for advancing the lens power of at least one of the lenses positioned within the lens housing. A rotation element is positioned adjacent a portion of the engagement surface of the single dial sphere control so as to facilitate a controlled and sensitive advancement of the single dial sphere control and, in turn, the lenses which are being rotated thereby. A rotation disengagement member is operably attached to a portion of the lens rotation element so as to enable alternatively engaged and disengaged advancement of the single dial sphere control. In addition, barrier pieces are integrally attached to the lens housing of the vision testing apparatus so as to shield the adjustment knobs and dials, and, more particularly, the single dial sphere control positioned thereon, from a patient's hands during an ophthalmic examination, as well as to facilitate manipulation of one or both of the sphere dial and lens rotation elements by the practitioner.
REFERENCES:
patent: 1240289 (1917-09-01), Woolf
patent: 2322878 (1943-06-01), Peck et al.
patent: 2923200 (1960-02-01), Wright
patent: 2949810 (1960-08-01), Wright
patent: 2968213 (1961-01-01), Wright et al.
patent: 3498699 (1970-03-01), Wilkinson
patent: 4523822 (1985-06-01), Thurston
patent: 4798457 (1989-01-01), Morohashi et al.
Nielsen Ronald R.
Witt Erwin
Arnold Bruce Y.
Parsons David R.
Woodlyn Inc.
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