Which test assesses central visual acuity?

Which test assesses central visual acuity?

• A. Fundus photography
• B. Snellen chart visual acuity testing
• C. Intraocular pressure measurement
• D. Slit-lamp examination

Answer: (B)

Central visual acuity measures how clearly you can resolve fine detail right in the center of your gaze. The Snellen chart does this directly by asking you to read letters on lines that get progressively smaller from a standard distance. How well you can identify the smallest line correctly reflects the clarity of central vision, with results typically expressed as a fraction like 20/20. The other tests look at structures or pressures in the eye rather than how finely you can see detail: fundus photography documents the retina’s appearance, intraocular pressure measurement checks eye pressure, and a slit-lamp exam assesses the cornea, lens, and other anterior parts. So for assessing central visual acuity itself, the Snellen chart testing is the tool used.

Central visual acuity measures how clearly you can resolve fine detail right in the center of your gaze. The Snellen chart does this directly by asking you to read letters on lines that get progressively smaller from a standard distance. How well you can identify the smallest line correctly reflects the clarity of central vision, with results typically expressed as a fraction like 20/20. The other tests look at structures or pressures in the eye rather than how finely you can see detail: fundus photography documents the retina’s appearance, intraocular pressure measurement checks eye pressure, and a slit-lamp exam assesses the cornea, lens, and other anterior parts. So for assessing central visual acuity itself, the Snellen chart testing is the tool used.