Inferior extent of the monocular field is 75 degrees.

• A. 60 degrees
• B. 105 degrees
• C. 50 degrees
• D. 75 degrees

Answer: (D)

The question is about the normal reach of the monocular visual field below fixation. In a healthy eye, the lower edge of the field is typically around 75 degrees from the central fixation point. That value reflects standard clinical references used in perimetry and eye exams, where the inferior boundary is usually about 75°, while other directions are in the 60°–100° range depending on direction. So 75 degrees matches the expected inferior extent.

Stated differently, this is a common benchmark used when assessing how far someone can see downward with one eye; values like 60° or 50° are smaller than normal, and 105° would exceed typical physiological limits for the inferior field.