averted vision

'averted vision' can also refer to...


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A technique used to see faint objects visually. It involves looking to one side of an object's position, rather than directly at it, so that light falls on to the outer part of the retina, which is more sensitive than the centre of vision. To avoid the risk of the object falling on the eye's blind spot, it should be kept on the side of the field of view nearest the nose.

Subjects: Astronomy and Astrophysics.

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