Lens sizing device

Details Lens sizing device Lens sizing device

1978-12-04

1981-01-13

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

33200, A61B 310

Patent

active

042446392

ABSTRACT:
An improved measuring rule for measuring the pupillary distance between a person's eyes is provided wherein a disc is both rotatably and slidably supported on an index rule, the disc being similarly indexed. By positioning the disc over the pupil of an eye while the person is wearing a pair of lens-receiving frames, the disc provides measurement of the required lens blank size necessary for those frames simultaneously with the measurement of the pupillary distance. The disc also facilitates the measurement for a bifocal lens and also indicates any required vertical height adjustment caused by an optical abnormality.

REFERENCES:
patent: 1052161 (1911-06-01), Mayerle

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