Vision correcting device

Details Vision correcting device Vision correcting device

1996-02-20

1997-04-29

Mai, Huy

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Combined

351 41, 60620425, G02C 100, A61F 500

Patent

active

056254261

ABSTRACT:
A vision correcting device comprises an eye shield, an air tube fastened at one end thereof with the eye shield, and a pressure apparatus fastened with another end of the air tube. The pressure apparatus comprises a motor, a speed-changing mechanism driven by the motor, an eccentric wheel actuated by the speed-changing mechanism, a roller, a push rod, and an air sac. When the eccentric wheel is actuated to turn clockwise, the push rod is actuated to cause the air sac to contract rapidly and relax slowly so as to bring about a positive pressure in the shield for the treatment of myopia. When the eccentric wheel is actuated to turn counterclockwise, the push rod is actuated to cause the air sac to contract slowly and relax rapidly so as to bring about a negative pressure in the shield for the treatment of hyperopia.

REFERENCES:
patent: 2690173 (1954-09-01), Seeger et al.

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