Improvements in or relating to means or devices for investigating, correcting, and developing the power of human vision

摘要

425,574. Sight -- testing appliances. SIMPKINS, R. B., 13, Holly Road, Edgbaston, Birmingham. Sept. 6, 1933, No. 20738/34. Divided out of 425,474. [Class 97 (i)] [See also Group VI] An appliance for testing and exercising binocular focusing of the eyes comprises an annulus 4, mounted on a bracket 5 on a handle 5a, and a disc 7, having a focusing spot 7a or other marking thereon, carried by a screw 6 in a bearing 5b on the handle, the screw permitting relative adjustment of the disc and annulus. The annulus 4 may bear radial markings at 90‹ to one another.