This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
[{'content': 'Worth 4 dot test is done for: \nSelect and explain. \nA. Color deficiency, B. Strabismus, C. Binocular vision, D. Squint', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 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.', 'role': 'assistant'}]