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Distance PD is the separation between the visual axes of the eyes in their primary position, as the subject fixates on an infinitely distant object. [2] Near PD is the separation between the visual axes of the eyes, at the plane of the spectacle lenses, as the subject fixates on a near object at the intended working distance. [3]
Prism compressors are typically used to compensate for dispersion inside Ti:sapphire modelocked lasers. Each time the laser pulse inside travels through the optical components inside the laser cavity, it becomes stretched. A prism compressor inside the cavity can be designed such that it exactly compensates this intra-cavity dispersion.
Prism Leisure Corporation Plc was a distribution and publishing company that primarily focused on reissues and compilations, often at low prices. The company was located in Enfield , Middlesex , United Kingdom until it was placed into administration in June 2007.
Comparison of browline (left) and wayfarer horn-rimmed glasses, with prescription lenses for myopia. A variant of horn-rimmed glasses, browline glasses, became one of the defining eyeglass styles of the 1940s and 1950s. Invented in 1947, the style combined the aesthetics of horn-rimmed glasses with the stability of metal frames by fitting ...
Vision therapy is a subset of behavioral optometry. In general, vision therapists attempt to improve the vision, and therefore day-to-day well-being, of patients using "eye exercises," prism, and lenses, with more emphasis on the patient's visual function.
Prescription glasses, Sport glasses, Safety glasses, Sunglasses: ... GlassesUSA.com is an online retailer of prescription eyewear. [2] It was founded in 2009. [3] History