A loupe apparatus includes a support, a post coupled to the support, and a lens holder rotatably coupled to the post. The lens holder is rotatable around an axis of the post. The lens holder includes an arm, an extension coupled to the arm with a ball and socket joint, and a lens coupled to the extension.

A variety of femtoprojector optical systems are described. Each of them can be made small enough to fit in a contact lens using plastic injection molding, diamond turning, photolithography and etching, or other techniques. Most, but not all, of the systems include a solid cylindrical transparent substrate with a curved primary mirror formed on one end and a secondary mirror formed on the other end. Any of the designs may use light blocking, light-redirecting, absorbing coatings or other types of baffle structures as needed to reduce stray light.

A user-wearable fluorescence based visualization system comprising a multi-light lamp assembly that provides for the selected output of light using multiple light emitting sources, wherein the outputted light may be tailored to generate response wavelength by the interaction of the emitted light and a tissue illuminated by the emitted light, through the process of fluorescence, and a viewing system that allows a practitioner view the fluorescent light generated by the tissue, and distinguish between healthy and diseased tissues.

A user-wearable fluorescence based visualization system comprising a multi-light lamp assembly that provides for the selected output of light using multiple light emitting sources, wherein the outputted light may be tailored to generate response wavelength by the interaction of the emitted light and a tissue illuminated by the emitted light, through the process of fluorescence, and a viewing system that allows a practitioner view the fluorescent light generated by the tissue, and distinguish between healthy and diseased tissues.

Disclosed is a distance vision-realizing eyeglasses for an image display device, including: a case which surrounds an eye area of a wearer and has a pair of holes formed in front thereof; a double convex lens assembly which includes a pair of lens housings respectively mounted in the pair of holes of the case and a pair of double convex lenses respectively provided in the pair of lens housings on a front straight line of both eyes of the wearer, the pair of the double convex lenses including an outer convex lens positioned on an outer side and fixed to the lens housing and an inner convex lens positioned inside the lens housing and mounted movably forward and backward; and a driving part which is installed between the pair of lens housings and moves a pair of inner convex lenses of the double convex lens assembly.

The spectacle lens includes a lens substrate including a blue light absorbing compound, and a multilayer film including a metal layer having a film thickness of 1.0 nm to 10.0 nm, wherein a blue light cut ratio is 21.0% or more, an average reflectance in a wavelength range of 400 nm to 500 nm measured on an object-side surface is 1.00% or less, and an average reflectance in a wavelength range of 400 nm to 500 nm measured on an eyeball-side surface is 1.00% or less.

An augmented reality system can include an electronic contact lens and a power source. The source generates a time-varying magnetic field which induces a time-varying current in conductive coils embedded in the electronic contact lens. The electronic contact lens uses the induced current to harvest power or to determine the orientation of the contact lens. The embedded conductive coils are positioned such that the AR system can harvest power and estimate the orientation of the eye at a variety of contact lens orientations. The conductive coils may be embedded within the contact lens at any number of positions and orientations. The embedded coils can encircle a portion of the contact lens and can collectively form an annulus within the contact lens. The conductive coils are embedded such that for at least three conductive coils, no two of the planes defined by the at least three conductive coils are parallel.

A wearable medical device includes a frame and a lens coupled to the frame. The lens is configured to be positioned proximate eyes of a user. At least one lamp device is coupled to the frame. The at least one lamp device emits light forward from the frame. A controller activates and controls the at least one lamp device.

A wearable optical device increases a Resolvable Object Distance Range (RODR) thereby reducing focusing demands of a plurality of objects located along a visual angle distance for a user with presbyopia or myopia. The devise includes a negative refractive element and a positive refractive element located along an optical axis. The negative refractive element and the positive refractive element are separated from each other by a separation space and at a separation distance suitable for mounting on a spectacle. A surface of a non-central zone of the negative refractive element or the positive refractive element is a Fresnel surface. The separation space is filled by an intermediate media with a refractive index lower than that of the negative refractive element or the positive refractive element. In one embodiment, the intermediate media is an optical grade resin or polymer. In another embodiment, a spacing seal is located around a periphery of the separation space, and the intermediate media is a low-humidity gas for reducing condensation within the separation space during ambient temperature changes.

A user-wearable fluorescence based visualization system comprising a multi-light lamp assembly that provides for the selected output of light using multiple light emitting sources, wherein the outputted light may be tailored to generate response wavelength by the interaction of the emitted light and a tissue illuminated by the emitted light, through the process of fluorescence, and a viewing system that allows a practitioner view the fluorescent light generated by the tissue, and distinguish between healthy and diseased tissues.