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Vision testing involves a series of diagnostic procedures used to assess the clarity, sharpness, and accuracy of an individual's vision. These tests can determine if a person has any refractive errors, such as nearsightedness or farsightedness, as well as detect any underlying eye conditions or diseases that may be affecting their visual acuity. Vision testing typically includes assessments of visual acuity, depth perception, color vision, peripheral vision, and eye coordination. These tests are crucial for identifying potential vision problems early on and ensuring proper eye health and function.