This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Squint, Subject name: Ophthalmology
[{'content': 'Which of the following is used to depict the actions of extraocular muscles \nSelect and explain. \nA. Goldman three mirror, B. Hess Cha, C. Humphrey field, D. Octopus fiels', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hess chaing is done to depict the action of extra ocular muscle Goldman three mirror-Peripheral retina is best examined with indirect ophthalmoscopy and by the use of Goldman three mirror contact lens. Humphrey field-automated Perimetry. Octopus field-semi-automated kinetic perimetry', 'role': 'assistant'}]