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The specialists developed a software program that uses Google Glass to track finger shadows as someone types in their password. Their program then converts the touchpoints into the keys they were touching, allowing them to catch the passcodes. [120] Another concern regarding the camera application raises controversy to privacy.
Lenticular printing is a technology that uses lenticular lenses to create printed images with an illusion of depth or motion. Learn about the process, types, history, and examples of lenticular printing, and how it differs from 3D displays.
Learn about optical coatings, thin layers of material that alter the way light reflects and transmits from optical components. Find out how metal coatings such as gold, silver and aluminium are used, and how they compare with dielectric coatings.
Head-mounted displays are not designed to be workstations, and traditional input devices such as keyboards do not support the concept of smart glasses. Input devices that lend themselves to mobility and/or hands-free use are good candidates, for example: Touchpad or buttons; Compatible devices (e.g. smartphones or control unit) Speech recognition
A virtual retinal display (VRD) is a display technology that draws a raster display directly onto the retina of the eye. Learn about the history, applications, and challenges of VRD, as well as some examples of commercial products and research projects.
Prentice's rule is a formula to calculate the amount of prism correction in a lens based on decentration and lens power. It can be used for prescribing, tolerance control, or determining unprescribed prism in eyeglasses.
Learn about the different types of optical prisms, such as dispersive, reflective, beam-splitting and polarizing prisms, and how they refract, reflect or split light. Find out how prisms are made of transparent materials like glass, acrylic or fluorite, and how they can create spectra, images or polarizations.
Unlike with bifocals, near-vision correction is achieved over the entire field of view, in any direction.Distance vision corrections are made by re-adjusting the lens for distance, instead of by tilting and/or rotating the head to view object through the best part of the lens for the distance.