Device and method for testing field of vision
First Claim
1. An apparatus for use in assessing the field of vision of a subject eye, the apparatus comprising:
- a) an eyepiece for occluding the subject eye, the eyepiece having an inner surface;
b) a fixation light affixed to the inner surface in a position corresponding to about the center of the field of vision of the subject eye; and
,c) a plurality of selectively illuminable light sources affixed to the inner surface and positioned so as to extend to at least the limits of peripheral vision of a normal eye.
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Accused Products
Abstract
An apparatus for performing assessments of field of vision that is portable, does not require the patient to adopt a particular posture or position relative to the testing device and may be operated so as to require minimal active responses from the patient is disclosed. The invention includes a patch, cover, or other device designed to occlude from ambient light and visually stimulate the subject eye. The interior of the patch facing the occluded eye includes an array of light sources, such as LEDs or LCD pixels, selective and sequential illumination of each source being controlled electrically by the practitioner, either manually or via a computer controller. The close proximity of the light sources to the eye being tested also minimizes anomalous results arising from poor visual acuity.
14 Citations
16 Claims
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1. An apparatus for use in assessing the field of vision of a subject eye, the apparatus comprising:
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a) an eyepiece for occluding the subject eye, the eyepiece having an inner surface; b) a fixation light affixed to the inner surface in a position corresponding to about the center of the field of vision of the subject eye; and
,c) a plurality of selectively illuminable light sources affixed to the inner surface and positioned so as to extend to at least the limits of peripheral vision of a normal eye. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for assessing the field of vision of a subject eye comprising the steps of:
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a) covering the subject eye with a testing means having a centrally located fixation light and a plurality of selectively illuminable light sources affixed to an inner surface of the testing means and positioned so as to extend at least to the limits of peripheral vision of a normal eye; b) illuminating the fixation light; c) providing test signals from a control unit to the testing means which illuminate at least one of the light sources in a location that provides an indication of the field of vision of the subject eye; and
,d) determining the patient'"'"'s response to the test signals. - View Dependent Claims (10, 11, 12)
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13. A field of vision testing unit comprising:
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a) a headband; b) an eyepiece for occluding a subject eye connected to the headband and having an inner surface which extends at least to the limits of peripheral vision of a normal eye; c) a fixation light affixed to the inner surface in a position corresponding to about the center of the field of vision of the subject eye; d) a plurality of light sources affixed to the inner surface and positioned so as to extend to at least the limits of peripheral vision of a normal eye; e) means, connected to the eyepiece, for controlling the illumination of the fixation light and the light sources; f) means, connected to the controlling means, for detecting a patient'"'"'s response to the illumination of the light sources; and g) means, connected to the controlling means, for recording the patient'"'"'s response. - View Dependent Claims (14, 15, 16)
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Specification