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  2. Ophthalmic trial frame - Wikipedia

    en.wikipedia.org/wiki/Ophthalmic_trial_frame

    A trial frame is a tool used by ophthalmic professionals like ophthalmologists and optometrists. It is basically an adjustable spectacle frame with multiple cells, used to hold corrective lenses, and other accessories in subjective refraction (finding the correct spectacle power) and retinoscopy.

  3. Sun Belt Conference - Wikipedia

    en.wikipedia.org/wiki/Sun_Belt_Conference

    The Sun Belt also granted football-only invites to Idaho and New Mexico State on March 28, 2013. [14] Idaho and New Mexico State were both former Sun Belt members (Idaho for football only, New Mexico State for all sports) from 2001 to 2005. The large number of defections from the WAC forced that conference to drop football after the 2012 season ...

  4. Prism correction - Wikipedia

    en.wikipedia.org/wiki/Prism_correction

    Prism correction is commonly specified in prism dioptres, a unit of angular measurement that is loosely related to the dioptre. Prism dioptres are represented by the Greek symbol delta (Δ) in superscript. A prism of power 1 Δ would produce 1 unit of displacement for an object held 100 units from the prism. [2]

  5. Green belt (United Kingdom) - Wikipedia

    en.wikipedia.org/wiki/Green_belt_(United_Kingdom)

    Designated areas of green belt in England; the Metropolitan Green Belt outlined in red. In British town planning, the green belt is a policy for controlling urban growth.The term, coined by Octavia Hill in 1875, [1] [2] refers to a ring of countryside where urbanisation will be resisted for the foreseeable future, maintaining an area where local food growing, forestry and outdoor leisure can ...

  6. Belt (mechanical) - Wikipedia

    en.wikipedia.org/wiki/Belt_(mechanical)

    The mechanical belt drive, using a pulley machine, was first mentioned in the text of the Dictionary of Local Expressions by the Han Dynasty philosopher, poet, and politician Yang Xiong (53–18 BC) in 15 BC, used for a quilling machine that wound silk fibres onto bobbins for weavers' shuttles. [1]

  7. Seat belt - Wikipedia

    en.wikipedia.org/wiki/Seat_belt

    In case of vehicle rollover in a U.S. passenger car, there are 0.71% fatalities in 1994 and 0.87% in 2014 when user is restrained. [5] There are 7% fatalities in 1994 and 13% in 2014 when the user is unrestrained. [5] In case of vehicle rollover, there are 10% incapacitating injury in 1994 and 10% in 2014 when the user is restrained.

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