Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1988-09-30
1991-10-08
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
351243, 351246, A61B 302
Patent
active
050549081
ABSTRACT:
A method and apparatus for evaluating a human visual function employ a set of test objects that have viewing surfaces. One viewing surface bears no visually perceptible pattern and hence is visually homogeneous. Other viewing surfaces bear patterns of selected different coarseness corresponding to different visual acuities. The viewing surfaces preferably are otherwise visually identical and have selected luminosities. An examiner can readily evaluate a visual acuity function of a wide range of subjects, including infants, by observing the subject's eye motion to determine whether the subject distinguishes a perceptible pattern from the homogeneous pattern.
REFERENCES:
patent: 4365873 (1982-12-01), Ginsburg
patent: 4615594 (1986-10-01), Task
Teller, D. Y., Morse, R., Borton, R., and Regal, D.: Visual Acuity for Vertical Diagonal Grating in Human Infants, Vision Res. 14: 1433-1439, 1974.
Katsumi, O., Oguchi, Y., and Uemura, Y.: Assessment of Visual Ability in Infantile Esotropia Using the Preferential Looking Method, Jpn. J. Opthalmol. 25: 457-463, 1981.
Katsumi, O., Oshima, T., and Uemura, Y.: Development of Visual Acuity in Infant and Young Children up to Three Years Evaluated with the Preferential Looking Method, Opthalmic Pediatr. Genet. 2: 139-147, 1983.
Dobson, V., Teller, D. Y., Lee, C. P., Wade, B.: A Behavioral Method for Efficient Screening of Visual Acuity in Young Infants, I. Preliminary Laboratory Development, Invest. Ophthalmol. Vis. SCI. 17:1142-1150, 1978.
Katsumi Osamu
Miyanaga Yoshitaka
Bovernick Rodney B.
Eye Research Institute of Retina Foundation
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