Medical Definition of Direct image

1. Such as seen in a mirror or through a magnifier. A virtual image has no real existence in space as does a real image from a lens. It does have a definite location, however, caused by the angles of divergence of the rays received by the eye. This can be shown by the common school experiment of placing a pin coincident with its mirror image behind a sheet of glass acting as a partial mirror. Its location can also be placed in design by extrapolating backwards to a focus. If a magnifier is used as it should be, with the object at its focus, the virtual image is at infinity. The same is true for a microscope focused for the relaxed eye. See: distance of virtual image. (05 Aug 1998)

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Lexicographical Neighbors of Direct Image

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direct dye
direct embolism
direct evidence
direct examination
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direct filling resin
direct fire
direct flap
direct flight
direct fluorescent antibody
direct fluorescent antibody test
direct fracture
direct free kick
direct illumination
direct image (current term)
direct inguinal hernia
direct initiative
direct inward dialing
direct lead
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direct maternal death
direct method for making inlays
direct nuclear division

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