You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Binocular single vision is tested by - and explain in detail?
Synoptophore (major amblyoscope) consists of two tubes, having a right-angled bend, mounted on a base. Each tube contains a light source for illumination of slides and a slide carrier at the outer end, a reflecting mirror at the righth-angled bend and an eyepiece of +6.5 D at the inner end. The two tubes can be moved separately or together by means of knobs around a semicircular scale. Synoptophore tests for sensory functions include: Estimation of grades of binocular vision Detection of normal / abnormal retinal correspondence (ARC) Neutral density filter test.