Ocular Accommodation, Convergence and Fixation Disparity: A Manual of Clinical Analysis Butterworth Heinemann ( 12 October, 1989 ) Book Our Price : £ 13.00 Prices subject to change. we are currently unable to offer this title. It may be out of stock with the publisher or out of print. If you would like to purchase this title, we recommend that you occasionally check this page to see if it has become available.