Medical Definition of Image virtual

1. A virtual image has no real existence. It is the image seen when looking into a mirror. The field of view of the microscope is a good example of a virtual image. When the eye operates in conjunction with a lens to form an image on the retina, the visual sensation is as if the image existed in space. That its apparent location is very definite is proved when a pin can be made to coincide with the mirror (virtual) image of another pin that is seen by looking at a sheet of glass acting as a mirror. With a lens system a virtual image can be definitely located as by graphically tracing rays back to a focus. In a microscope, if the eye is relaxed as it should be, the virtual image will be at infinity. Measurements show that most observers place the aerial image at 20-25 feet, some as close as seven, because of partial accommodation. (11 Mar 1998)

Lexicographical Neighbors of Image Virtual

image cytometry
image enhancement
image field
image intensifier
image macro
image macros
image map
image maps
image orthicon
image processing
image real
image scanner
image space
image spaces
image tube
image virtual (current term)
imageable
imageboard
imageboards
imaged
imageless
imagelike
imagemap
imagemapped
imagemapping
imagemaps
imager
imageries
imagers
imagery

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