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While contact sports are considered the most high risk for injury, in some sports being a major feature (such as boxing or other martial arts), limited-contact and noncontact sports are not without risk as injury or contact may come about as a result of a fall or collision with the playing area, or a piece of sporting equipment, such as being ...
The prism cover test (PCT) is an objective measurement and the gold standard in measuring strabismus, i.e. ocular misalignment, or a deviation of the eye. [1] It is used by ophthalmologists and orthoptists in order to measure the vertical and horizontal deviation and includes both manifest and latent components. [1]
For a more intuitive explanation of the need for Bessel's correction, see § Source of bias. Generally Bessel's correction is an approach to reduce the bias due to finite sample size. Such finite-sample bias correction is also needed for other estimates like skew and kurtosis, but in these the inaccuracies are often significantly larger. To ...
In 2008, 1-800 Contacts entered into a partnership with Walmart to integrate phone and Internet orders for contact lenses with eye-doctor services and operations in Walmart's stores, [9] The agreement ended in 2013. In June 2013, 1-800 Contacts launched glasses.com, a domain which the company has held since 1999. [10]
Diplopia is the simultaneous perception of two images of a single object that may be displaced horizontally or vertically in relation to each other. [1] Also called double vision, it is a loss of visual focus under regular conditions, and is often voluntary.
One potential option was to insert corrective optics, lenses or mirrors in the telescope tube between the primary mirror and the secondary reflector. However the tube was too narrow for even the smallest astronaut to slither down it, leading to a search for a means of inserting the required corrective components into the tube.
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