![]() ![]() These results demonstrate a clear functional relation between the bodily self and basic tactile perception. Two characteristic effects of VET were observed: (1) cross-modal enhancement from seeing the hand was inversely related to overall tactile acuity, and (2) participants near sensory threshold showed significant improvement following synchronous stroking, compared to asynchronous stroking or no stroking at all. Tactile acuity was measured by having participants judge the orientation of square-wave gratings. Thus, we manipulated whether or not participants felt like they were looking directly at their hand, while holding the actual stimulus they viewed constant. In this illusion, a prosthetic hand which is brushed synchronously-but not asynchronously-with one's own hand is felt to actually be one's hand. We examined whether VET is an effect of seeing a hand, or of seeing my hand, using the rubber hand illusion. While several studies have demonstrated this visual enhancement of touch (VET) effect, its relation to the 'bodily self', or mental representation of one's own body remains unclear. For example, seeing the hand improves tactile acuity on the hand, compared to seeing a non-hand object. Therefore, relations between vision and touch are important for the sense of self and for mental representation of one's own body. We further see that others' bodies are similar to our own body, but we have no direct experience of touch on others' bodies. This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.We experience our own body through both touch and vision. The results show that the device can accurately detect objects each subfield of the 40 by 50 degree field of view of the camera, and that the vibration actuators receive a voltage that is linearly proportional to the distance of the target from the camera. Across that 1.5-meter range, the voltages (maximal 2.0 V) exhibited a linear relationship (r 2 = 0.98) with the distance of the target from the camera. PBVE is a process of practicing procedures that result in the individual becoming more. Targets were repeatedly and reliably detected in each receptive zone at an interval distance of 0.5 meters to 2 meters away from the camera. PSYCHO-BEHAVIORAL VISION ENHANCEMENT (PBVE) By Albert Shankman, O.D. Using a target size of 0.8 cm diameter, two LEO devices were tested. Output voltages were measured for each actuator at 30.5 cm increments over the distance that the target could be detected. The testing device (approximately 25 by 14 by 14 feet in size) was built to examine the performance of the detection and the output voltages presented to the actuator boxes for each of the peripheral receptive zones. We constructed a test device to present objects at known distances within each of the 8 pre-defined peripheral receptive zones of the camera. Each location roughly corresponds to the centroid of the spatial area in front of the patient detected by the infrared camera. When testing subjects, each actuator box is placed in one of 6 different shirt pocket locations, with 1 worn on each ankle. ![]() Utilizing an Intel RealSense R200 distance detecting infrared camera (imaging field 40 o high by 50 o wide), our device inputs object distance information to an Intel Compute Stick running Windows 10 that provides computation, scaling, and WiFi connectivity to each of 8 peripheral actuator boxes containing a Particle Photon WiFi transponder, a linear amplitude to voltage vibration motor, and a battery with self-contained charger. ![]() This device may signal the presence of peripheral threats and beneficial targets to individuals with retinitis pigmentosa, advanced glaucoma, and other disorders involving compromised peripheral but preserved central vision. To evaluate the distance and field detection relationship of a novel prototype device that provides distance amplitude-modulated, single-frequency, cutaneous sensory substitution of visual information obtained by a wide-field distance-measuring camera. ![]()
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