Eye chart

Details Eye chart Eye chart

1985-09-05

1987-04-28

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351200, 351203, A61B 304

Patent

active

046609482

ABSTRACT:
An eye chart for use in a treatment program that includes eye exercises comprises a peripheral line defining a geometric shape and a pair of intersecting lines within the area defined by the peripheral line. Spool-shaped images are superimposed on the peripheral line in a predetermined pattern and one of the intersected lines includes an intermediate wavy portion. Numerals of desired sizes are located at various positions on the chart. The invention also encompasses several eye exercise methods utilizing the chart.

REFERENCES:
patent: 978277 (1910-12-01), Cross
patent: 1412902 (1922-04-01), Tallman
patent: 1879833 (1932-09-01), Tillyer
patent: 1999054 (1935-04-01), Lee
patent: 2352500 (1944-06-01), Shepard
patent: 2385992 (1945-10-01), Jobe
patent: 2463813 (1949-03-01), Shepard
patent: 2723466 (1955-11-01), Ott
patent: 2747458 (1956-05-01), Richards
patent: 3011394 (1961-12-01), Sherman
patent: 4257690 (1981-03-01), Howland
Laurence et al; Visual Optics and Sight Seeing, 1936, p. 243.
Coulden; Versatility in Subjective Refraction; The Optician, vol. 153; Mar. 1967, pp. 291-293.

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