An ophthalmic lens intended to be worn in front of an eye of a wearer having a first optical function based on a prescription of the wearer for correcting an abnormal refraction of said eye of the wearer and comprising at least one activable optical element, wherein in a first state the at least one activable optical element contributes with the rest of the lens to focus the image of an object at distance on the retina, and in a second state the at least one activable optical element has a second optical function of not focusing an image on the retina of the eye of the wearer so as to slow down the progression of the abnormal refraction of the eye

A membrane assembly 150 for a variable focusing power optical assembly 100 comprising a distensible membrane 155 that is held under tension around its periphery by at least one bendable support ring 159 and one or more curvature controllers 170 that are mounted to respective discrete sections of the support ring 159 for actively controlling the curvature of those sections of the ring in a plane (Btz) that is parallel to a z-axis normal to an (x,y) plane which is defined by the un-deformed support ring and tangential (t) to the periphery (boundary B) of the membrane. Also disclosed is a variable focusing power optical assembly 100 comprising such a membrane assembly, which has a compressible fluid-filled envelope having a first wall formed by the distensible membrane 155, an inflexible second wall 114 opposite the first wall, the support ring 159 being held at a fixed distance from the second wall at hinge points that are spaced apart around the support ring 159 and being bendable towards or away from the second wall intermediate the hinge points on the z-axis which is substantially aligned or coincident with an optical axis of the optical assembly 100, and a side wall 146 between the first and second walls that is collapsible to accommodate such bending; wherein the membrane 155 is arranged to distend in a direction towards or away from the second wall upon bending of the support ring 159 between the hinge points. In some embodiments, the second wall 114 may be formed by or supported on a surface 114 of a rigid body 110, and the support ring 159 may be mounted on the rigid body 110 by support pins 130 at the hinge points. Also disclosed is an augmented reality headset or helmet 80 comprising an augmented reality display module 800 comprising two such variable focusing power optical assemblies 801, 901 arrange one in front of the other in optical alignment with a waveguide display 1001 interposed therebetween.

The disclosed optical lens assemblies may include a deformable optical element including a substantially transparent transducer configured to deform, and thus change at least one optical property of, the deformable optical element. At least a portion of the substantially transparent transducer may be positioned within a substantially transparent optical aperture of the optical lens assembly. Various head-mounted displays incorporating such an optical lens assembly, and methods of fabricating the same, are also disclosed.

A meniscus shaped lens module comprises one or more structures that decrease an amount of pressure or force to move one or more surfaces of the lens module and increase a separation distance of anterior and posterior surfaces of the module in order to provide an increase in optical power. A lens structure of the module comprises one or more of a pattern of a surface of a central chamber, a meniscus, a reduced diameter or a soft material in order to provide increased amounts of curvature of an outer contact lens surface with decreased amounts of pressure. The pattern can be formed in one or more of many ways, and may comprise one or more of folds, patterning, bellows or concertinaed surface of an optically transmissive material having a substantially uniform thickness such as a sheet of a membrane material.

An eye-implantable electrowetting lens can be operated to control an overall optical power of an eye in which the device is implanted. A lens chamber of the electrowetting lens contains first and second fluids that are immiscible with each other and have different refractive indexes. By applying a voltage to electrodes of the lens, the optical power of the lens can be controlled by affecting the geometry of the interface between the fluids. When the electrowetting lens is inserted into the eye, the lens chamber may contain only one of the first and second fluids. The other fluid can be added after insertion through a needle, a tube, or some other means. Having only one of the first and second fluids in the lens chamber during insertion of the lens can prevent fouling of internal surfaces due to folding or other manipulation of the lens during the insertion process.

An eye-implantable electrowetting lens can be operated to control an overall optical power of an eye in which the device is implanted. A lens chamber of the electrowetting lens contains first and second fluids that are immiscible with each other and have different refractive indexes. By applying a voltage to electrodes of the lens, the optical power of the lens can be controlled by affecting the geometry of the interface between the fluids. To prevent fouling the surface due to folding or other manipulation of the lens during the insertion process, one or more surfaces within the lens chamber is highly underwater oleophobic.

A system for preventing motion sickness resulting from virtual reality or augmented reality is disclosed herein. In one embodiment, the system includes a virtual reality or augmented reality headset configured to be worn by a user, the virtual reality or augmented reality headset configured to create an artificial environment and/or immersive environment for the user; at least one fluidic lens disposed between an eye of the user and a screen of the virtual reality or augmented reality headset; and a fluid control system operatively coupled to the at least one fluidic lens. In another embodiment, the system includes at least one tunable prism disposed between an eye of the user and a screen of the virtual reality or augmented reality headset, the at least one tunable prism configured to correct a convergence problem associated with the eye of the user.

Tunable lens (1) comprising a fluidic volume (2), a flexible membrane (3) and a shaping element (4), wherein the membrane (3) delimits the fluidic volume (2) on one side, the shaping element (4) is attached to the membrane (3), the shaping element (4) surrounds an optically active region of the membrane, the shaping element (4) is arranged to alter optical properties of the tunable lens (1) by deflection, in top view the shaping element (4) has a non-circular contour (40), wherein the contour (40) extends within an imaginary circumcircle (10), and the amount of deflection of the shaping element (4) is proportional to a lateral distance of the contour (40) to the circumcircle (10).

An adaptive lens (200) may feature two flexible films (202), (204) secured within a rim (210) and defining a space therebetween which is filled with an appropriate fluid (206). A piston (220), driven by at least one actuator (214a-c), may be attached to one of the films (204) to displace it with respect to the remainder of the assembly. Such action of the piston (220) distorts both films (202), (204) to change the shape of the lens and may be driven by bimorph actuators (214a-c). Distance of displacement may be calculated by measuring a magnetic field created by at least one magnet (222a-c) attached to the piston (220). Feedback control may be used to stabilize the apparatus.

A control system for an optical assembly having a fluid optical cell coupled to a hydraulic drive system includes a detector system that detects a line-of-sight of a user based on electromagnetic energy reflected from an eye of a user. The control system additionally includes a controller configured to determine a distance to an observed object based on the detected line-of-sight. The control system is also configured to control the hydraulic drive system to modify hydraulic pressure applied to the fluid optical cell such that the fluid optical cell is focused on the observed object.