Abstract ONE OF the problems in tests for malingering is that of preventing the patient from testing each eye separately when one eye is alleged to be blind or amblyopic. For that reason, a large battery of tests has often been necessary to prove the falsity of the patient's claims. With the development of plane polaroid,® a number of useful tests have been created in which polaroid® lenses are placed in the trial frame and crossed at right angles to each other to occlude vision in the good eye or are used in conjunction with a projection device, the patient wearing a pair of polaroid® spectacles and viewing projected material, which can be blocked out in either eye. The test about to be described makes use of circular polaroid® rather than plane polaroid.® It is based upon the fact that light, on passing through a circularly polarized medium, is caused to References 1. For simplicity, the polaroid® strip is cut so that only one row of letters or numbers is covered at one time. 2. This instrument can be obtained from Clairmont-Nichols, Inc., 16 E. 53d St., New York.
A.M.A. Archives of Ophthalmology – American Medical Association
Published: May 1, 1952
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