<prompt> Worth 4 dot test is done for:Color deficiencyStrabismusBinocular visionSquint  <response>: Ans. c Binocular visionRef: A.K. Khurana 6th ed. 1342 Worth four dot test WFDT is a test for binocular vision using red-green color dissociation. It is a dissociation test which can be used with both distance and near fixation and differentiate between binocular single vision, abnormal retinal correspondence and suppression. NOTE: result of WFDT can only be interpreted if the presence or absence of manifest squint is known at the time of testing. 