Abstract: A handheld ophthalmic device configured to perform various optical diagnostic tests to determine the health of a subject's eye. The handheld ophthalmic device is configured to be attached to a smartphone, a cell phone or an electronic tablet. The smartphone, a cell phone or an electronic tablet can be used to view images obtained by the handheld ophthalmic device and to transmit data and images obtained by the handheld ophthalmic device to an ophthalmologist located remotely.

Abstract: A partial electronic see-through HMD includes one or more subassemblies that occlude a central portion of a user's field of view (the peripheral portions of the user's field of view may remain unobstructed). Each subassembly includes an outward facing camera, a display, and an eyepiece. Images of the occluded central zone are captured by the camera and projected to the user via the display and eyepiece. The projected images can also include electronic information, such as AR image overlays. The peripheral zones are not occluded and remain directly viewable by the user. Thus, the projected images complete (or partially complete) the user's FOV of the external environment between the peripheral zones and may provide additional electronic information to the user.

Abstract: A wide field of view night vision system is described. The system comprises a head attachment apparatus configured to attach to a user's head and a night vision subsystem. The night vision subsystem comprises one or more night vision image sensors attached to the head attachment apparatus. Each sensor receives input light and produces a digital image of the input light. A processor processes the digital image(s) to produce a wide-field image. The wide-field image spans at least 60 degrees of a user's horizontal field of view. A display and eyepiece attached to the head attachment apparatus receives and displays the wide-field image. The eyepiece is positionable between the display and the user's eye to image the wide-field image into the user's eye.

Abstract: Described is a wide field of view, high resolution digital night vision system that uses transparent, repositionable eyepieces to present night vision information in the field of view of the user. The WNVS is advantageous in that it can be used in both night environments, but also in daytime environments by using clear eye pieces that allow the user to concurrently see the outside environment or allowing the eyepieces to be positioned out of the field of view of the user without significantly occluding the user's field of use during daytime use.

Abstract: Inflatable device pressure gauge apparatus and methods are described. According to one aspect, an inflatable device pressure gauge apparatus includes a housing, an attachment mechanism configured to attach the pressure gauge apparatus to an inflatable device which comprises an air chamber which is configured to be inflated to an increased pressure above atmospheric pressure during use of the inflatable device, a pressure sensor coupled with the housing and configured to sense pressurized air from the air chamber of the inflatable device and to output a signal corresponding to an air pressure within the air chamber, a processor configured to process the signal from the pressure sensor and to control generation of a user perceptible emission regarding the air pressure of the air chamber as a result of the processing of the signal, and a power source coupled with the housing and configured to provide electrical energy to the processor.