The macula is approximately _____________ mm in diameter.

The macula is approximately _____________ mm in diameter.

• A. 5.0 mm
• B. 5.5 mm
• C. 4.5 mm
• D. 6.0 mm

Answer: (B)

The macula is the central retina around the fovea, and its size is about 5.5 mm in diameter. This reflects its role as the region governing high-acuity vision, extending beyond the small foveal pit (roughly 1.5 mm across) to include the surrounding parafoveal retina. In anatomical terms, the macula spans roughly a few disc diameters across the posterior pole, with the optic disc typically around 1.8 mm in diameter, which aligns with the macula being about 5.5 mm wide. Therefore, 5.5 mm is the standard approximate diameter for the macula.

The macula is the central retina around the fovea, and its size is about 5.5 mm in diameter. This reflects its role as the region governing high-acuity vision, extending beyond the small foveal pit (roughly 1.5 mm across) to include the surrounding parafoveal retina. In anatomical terms, the macula spans roughly a few disc diameters across the posterior pole, with the optic disc typically around 1.8 mm in diameter, which aligns with the macula being about 5.5 mm wide. Therefore, 5.5 mm is the standard approximate diameter for the macula.