Which of the following is least likely to be affected by central vision loss caused by macular disease?

• A. Reading signs
• B. Recognizing faces
• C. Mobility
• D. Contrast sensitivity

Answer: (C)

Macular disease damages the central retina, the fovea, which carries the sharp, detailed vision needed for high-acuity tasks. Reading signs and recognizing faces depend on resolving fine central details, so central vision loss here produces strong difficulties. Contrast sensitivity also drops with macular dysfunction, making subtle differences in light and shade harder to detect. Mobility, however, relies more on peripheral vision and broad spatial cues, which are less impacted by central retinal damage, so the ability to navigate surroundings tends to remain relatively better preserved. In this sense, mobility is the function least likely to be affected by central vision loss.