Contact lens embedded holographic pointer

Abstract

In this paper we present an infrared laser pointer, consisting of a vertical-cavity surface-emitting laser (VCSEL) and a diffractive optical element (DOE), encapsulated into a scleral contact lens (SCL). The VCSEL is powered remotely by inductive coupling from a primary antenna embedded into an eyewear frame. The DOE is used either to collimate the laser beam or to project a pattern image at a chosen distance in front of the eye. We detail the different SCL constitutive blocks, how they are manufactured and assembled. We particularly emphasize the various technological challenges related to their encapsulation in the reduced volume of the SCL, while keeping the pupil free. Finally, we describe how the laser pointer operates, what are its performances (e.g. collimation, image formation) and how it can be used efficiently in various application fields such as visual assistance and augmented reality.

Smart Contact Lenses—A Step towards Non-Invasive Continuous Eye Health Monitoring

“…AR-enabled SCLs can superimpose digital images and information onto the wearer s natural vision [28]. This allows for interactive and immersive experiences, such as navigation cues, gaming elements, and real-time data display [29,30]. SCLs can help people monitor their health in addition to correcting their eyesight by giving them real-time data on vital signs, biomarkers, and other health-related information [31].…”

Potential of a laser pointer contact lens to improve the reliability of video-based eye-trackers in indoor and outdoor conditions

“…In this context, we have proposed to take advantage of recent results in embedded electronics to develop an electronic contact lens ( 19 ) in order to simplify the tracking. Various contact lens configurations have been presented: first using photodiodes (to have sensors whose response varies directly with eye movements ( 23 )) then using on-board lasers that could be used to interact with position sensitive devices ( 29 ), to materialize the gaze direction ( 28 ) or simply to provide easily trackable features. These papers focused on the technical design and in each case, the lens was basically just placed on an artificial eye to validate the detection process.…”