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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]
Light from a single point of a distant object and light from a single point of a near object being brought to a focus. The accommodation reflex (or accommodation-convergence reflex) is a reflex action of the eye, in response to focusing on a near object, then looking at a distant object (and vice versa), comprising coordinated changes in vergence, lens shape (accommodation) and pupil size.
It is the distance between pupil centers. BVD Back vertex distance is the distance between the back of the spectacle lens and the front of the cornea (the front surface of the eye). This is significant in higher prescriptions (usually beyond ±4.00D) as slight changes in the vertex distance for in this range can cause a power to be delivered to ...
Sommers–Bausch Observatory is an astronomical observatory operated by the University of Colorado, Boulder on its main campus. The building was initially completed in 1953 and named after Elmer E. Sommers and Carl L. Bausch.
Although the pupillary response, in which the pupil dilates or constricts due to light is not usually called a "reflex", it is still usually considered a part of this topic. Adjustment to close-range vision is known as "the near response", while relaxation of the ciliary muscle to view distant objects is known as the "far response".
Accommodation is the process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies. In this, distances vary for individuals from the far point—the maximum distance from the eye for which a clear image of an object can be seen, to the near point—the minimum distance for a ...
The East Campus is about a quarter-mile from the main campus and is composed mainly of athletic fields and research buildings. CU Boulder's campus has been ranked as one of the most beautiful college campuses in the United States by Travel + Leisure and Condé Nast Traveler. [29] [30] [31]
JILA, formerly known as the Joint Institute for Laboratory Astrophysics, [1] is a physical science research institute in the United States. JILA is located on the University of Colorado Boulder campus.
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