Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Eye exercising or training type
Reexamination Certificate
2004-12-20
2010-06-01
Mack, Ricky L (Department: 2873)
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Eye exercising or training type
Reexamination Certificate
active
07726812
ABSTRACT:
A device for preventing and treating myopia includes a base, a spectacles frame (1), a holder (3) and a lens (2). The holder (3) is mounted on the base; a visual target (4) is placed on the base. The spectacles frame (1) is connected to the holder (3) by adjustable connecting parts (31,32,33,34,35), so the distance between the spectacles frame (1) and the visual target (4) which is placed on the base is adjustable.
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Dai Minghua
Dai Yaodong
Dai Minghua
Mack Ricky L
Tra Tuyen Q
Workman Nydegger
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