Focal scanning aid

Details Focal scanning aid Focal scanning aid

1975-12-29

1977-04-12

Grieb, William H.

40352, G09B 1704

Patent

active

040166597

ABSTRACT:
Mat of thin material has an aperture therein to limit the visible area of printed material to be read to aid in the development of good reading habits by controlling the focal scanning area. Set of focal scanning aids has progressively larger apertures to train the eye to scan areas.

REFERENCES:
patent: 140135 (1873-06-01), Hildreth
patent: 2996812 (1961-08-01), Hamilton
patent: 3408977 (1968-11-01), Colman
patent: 3704533 (1972-12-01), Weber

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