London: Routledge Kegan & Paul, Date: 1982. Book. Illus. by Profusely Illustrated. Very Good. Hardcover. 1st Edition. 8vo - over 7¾ - 9¾" tall. Unmarked, clean and solid copy in clean, price clipped dust jacket. Minor shelfwear. Includes packet in plastic in pocket on rear cover.. 1982. Routledge Kegan & Paul ISBN 0710008686 9780710008688 [US]

New York, New York, U.S.A.: Routledge Kegan & Paul, Date: 1982. Hard Cover. Very Good/Very Good. Ex-library copy with the usual stamps and markings. Interior pages clean and unmarked; tight binding. 293 pages. ""The variety of visual effects manipulated in OpArt are described and profusely illustrated by the author's own designs. The spatial illusions familiar to psychologists are then depicted using a novel technique of superimposing one design, printed on a transparent overlay, on top of another: the lines of the transparency may be distorted in size, shape, or orientation. More complex illusions than have yet been employed in either context are presented in the final section."" All 16 transparent plates present; but most have creases around edges. 1982. Routledge Kegan & Paul ISBN 0710008686 9780710008688 [US]

New York, New York, U.S. A Routledge Kegan & Paul 1982 Hard Cover Very Good in Very Good jacket Graphic Design Ex-library copy with the usual stamps and markings. Interior pages clean and unmarked; tight binding. 293 pages. "The variety of visual effects manipulated in OpArt are described and profusely illustrated by the author's own designs. The spatial illusions familiar to psychologists are then depicted using a novel technique of superimposing one design, printed on a transparent overlay, on top of another: the lines of the transparency may be distorted in size, shape, or orientation. More complex illusions than have yet been employed in either context are presented in the final section." All 16 transparent plates present; but most have creases around edges.