What commonly used test assesses near and distance vision?

The visual acuity test is specifically designed to assess an individual's ability to see clearly at both near and distance. This test typically measures how well a person can read letters at various distances, using standardized eye charts like the Snellen chart for distance vision and near vision cards for reading. By evaluating visual acuity, healthcare professionals can determine the clarity of a person's vision and identify any refractive errors, such as nearsightedness or farsightedness. This information is crucial in deciding on corrective measures, whether it be glasses, contact lenses, or further investigation into other eye conditions.

In contrast, the slit-lamp examination primarily focuses on the health of the eye's front structures and does not measure visual clarity. The tonometry test is used to measure intraocular pressure and assess glaucoma risk but does not evaluate visual sharpness. Lastly, the color vision test assesses an individual's ability to differentiate colors and is not used to evaluate overall visual clarity or acuity at varying distances. Thus, the visual acuity test stands out as the most relevant and commonly utilized method for gauging near and distance vision effectively.