system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Snellen's chart is used to test?
assistant
The correct answer is  Ans. is 'a' i.e., Visual acuity * Visual acuity of a eye is its ability to discriminate between two points, i.e. measure of the spatial resolution of the eye. One's visual acuity is an indication of the clarity or clearness of one's vision. It is a measurement of how well a person sees. Visual acuity is most commonly measured by Snellen's visual acuity chart.