Abstract: In described embodiments, a device and method for diagnosing brain and neurological issues is provided. The device measures the performance of Convergence, Divergence, and binocular tracking capabilities of a subject's eyes, which can be used to determine whether a subject has experienced a brain or other neurological event.

Abstract: An apparatus for assessing eye disease in a subject includes a body member including an arm portion, a handle portion, and an alignment portion. The arm and handle portions each have a first end portion oppositely disposed from a second end portion. Each of the first end portions are operably connected to the alignment portion. The arm portion includes a scale in degrees, and the alignment portion includes an alignment mechanism for aligning the body member with the visual field of the subject.

Abstract: Provided is an operative keratometer consisting of a built-in bright LED ring light, which uniquely provides immediate direct preoperative confirmation to the ophthalmologist of the proper meridian for astigmatic cuts and the most advantageous location of cataract incisions to minimize postoperative astigmatism. Also provided are methods for using the operative keratometer device to facilitate evaluation of the amount and direction of astigmatism in a patient. Further provided is a movable fixation/centration device and methods for its use to focus the operative keratometer, particularly for treating astigmatism, permitting the ophthalmologist to qualitatively assess both the amount and direction of the astigmatism; to more accurately conduct surgery near the pupil by providing a patient fixation point that permits the ophthalmologist to more precisely control movement of the patient's eye during an ophthalmic procedure; and to provide monocular centration of the patient's eye.

Abstract: A computer controlled perimetry system, which is easily operated even by an unskilled operator, for accurately measuring a visual field, and with which many patients can be effectively examined, has a dome having a hemispherical inner surface; a projector projecting a light spot onto the inner surface of the dome; an arm for horizontally moving the projector so as to trace a semicircle along the surface of a virtual hemisphere opposite to the dome; a first motor for driving the arm; a second motor for changing the projecting direction of the projector; a liquid crystal display for displaying the light spot projected onto the inner surface of the dome; a monitor display for observing a patient; and a computer storing a program for controlling the rotation of the first and second motors. Thus, the light spot projected by the projector can be swept to any point on the inner surface of the dome.

Abstract: A device for examining the visual field of the human eye which includes a cup-shaped screen, onto the base of which one or several test marks are projected, and usable for both kinetic and also static perimetry testing and offers test marks of a uniform size and brightness over the entire testing area. The screen consists for this purpose of a transparent material, whereby the test marks are projected from the back side onto the screen approximately parallel to the surface normal. The test mark is thereby arranged to move parallel and relative to the back side of the screen, so that each test mark is moved at an equidistant spacing from the screen.

Abstract: A method for prescribing a prism factor for eyeglasses for substantially correcting vertical and/or horizontal diplopia or double vision problems, which includes having a patient positioned for gazing at a target image while holding their head in a substantially fixed position, and then closing their affected eye for a period of time, whereafter they are instructed to open the affected eye and immediately report upon where a double image occurs upon a measurement grid associated with the target image continuing to be observed by their other eye, for permitting a prism factor to be prescribed relative to the measured distance between the target and double image created by the defective eye.

Abstract: Apparatus and methods for relaxing accommodation of an eye undergoing examination or other optical or medical procedures while concurrently permitting and facilitating positioning of the subject eye. A patch, cover, or other device designed to occlude and visually stimulate the eye opposite the subject eye includes multiple light sources facing the occluded eye. The practitioner illuminates a selected one (or ones) of the light sources within the patch and directs the patient to fixate on the source. As the occluded eye moves to fixate on the illuminated source, the subject eye follows the movement, thereby repositioning itself. Occluding the eye causes the image seen by it to appear to be at infinity, rather than nearby, causing the ocular muscles of both eyes to relax.

Abstract: A method for controlling the fixation of the eye of a patient during measuring of the sensitivity of the retina of the eye using a perimeter tester having a plurality of spaced testing light points of adjustable brightness, including the steps of adjusting the testing light point which lies in the center to the threshold value of the center of the eye of the patient, and thereafter repeatedly illuminating this testing light point with the threshold value or a super-threshold value near the threshold (1-4 dB superthreshold) to facilitate control of the fixation during the entire examination.