Perimetric measurement apparatus for measuring characteristics o

Details Perimetric measurement apparatus for measuring characteristics o Perimetric measurement apparatus for measuring characteristics o

1995-10-20

1998-02-10

Mai, Huy

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351226, 351237, A61B 302

Patent

active

057174814

ABSTRACT:
An apparatus for measuring a visual field of a patient, especially characteristics of X ganglion cells, displays a series of targets to a patient. A ramp stimulus is used to measure characteristics of X ganglion cells. A target size setting device sets targets of various sizes. A stimulus intensity changing device changes the intensity of the stimulus in accordance with the size set by the target size setting device. A response device measures the response from the patient, that is, whether the patient senses the target. A memory stores the intensity of stimulus and target size corresponding to the patient's responses.

REFERENCES:
patent: 5108170 (1992-04-01), Sugiyama
patent: 5235360 (1993-08-01), Minami
Okamoto et al., "Characteristics of two systems of human vision using fundus perimetry," Doc Ophthalmol Proceedings, Series 49 (1986), pp. 483-488.
Anderson, Automated Static Perimetry (Mosby Year Book), pp. title and verso, vii-xii, 1-51, 68 & 69, 262,291, and 301-305 (1992).
Grusser et al., Visual Agnosias and Other Disturbances of Visual Perception and Cognition (CRC Press, Inc.), pp. title and verso, v-ix, and 137-157 (1991).
Okamoto et al, "Review of visual system of human with an eye fundus perimeter," Neuro-ophthalmol. Jpn., vol. 3, No. 4 (1986).
Kani et al., "Visual field and receptive field," Ophthalmology, vol. 35, pp. 225-232 (1993).
Kani et al., "Fundus Controlled Perimetry," Docum. Ophthal. Proc. Series, vol. 19, pp. 341-350 (1979).

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