VISUAL

, relating to sight, or seeing.

Visual Angle, is the angle under which an object is seen, or which it subtends. See Angle.

Visual Line. See Line.

Visual Point, in Perspective, is a point in the horizontal line, where all the ocular rays unite. Thus, a person standing in a straight long gallery, and looking forward; the sides, floor, and cieling seem to meet and touch one another in this point, or common centre.

Visual Rays, are lines of light, conceived to come from an object to the eye.

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Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.

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