Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Eye exercising or training type
Patent
1986-02-06
1988-10-18
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Eye exercising or training type
351237, A61B 300
Patent
active
047782684
ABSTRACT:
The invention is an apparatus for training of the human visual accommodation system. Specifically, the apparatus is useful for training a person to volitionally control his focus to his far point (normally infinity) from a position of myopia due to functional causes. The functional causes could be due, for example, to a behavioral accommodative spasm or the effects of an empty field. The device may also be used to measure accommodation, the accommodation resting position and the near and far points of vision. The device comprises a number of optical elements arranged on a single optical axis (74). Several of the elements are arranged in order on a movable stage (20) in fixed relationship to each other: a light source (30), a lens (32), a target (36), an aperture (42), (48) or (52) and second lens (58). On base (18) and in fixed relationship to each other are eyepiece (70) and third lens (64). Stage (20) generates an image (72) of target (36) and the stage is movable with respect to base (18) by means of knob (22). The device is utilized for the various training and test functions by following a series of procedural steps, and interchanging the apertures as necessary for the selected procedure.
REFERENCES:
patent: 4408846 (1983-10-01), Balliet
Randle, Volitional Control of Visual Accommodation, Conf. Proc. No. 82, Adaptation and Acclimatisation in Aero Space Medicine, Germany 9/1970.
Bovernick Rodney B.
Brekke Darrell G.
Dzierzynski P. M.
Glenn Charles E. B.
Manning John R.
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