Moderate-stage glaucoma is defined by what pattern of visual field loss?

• A. Mild-stage glaucoma
• B. Moderate-stage glaucoma
• C. Severe-stage glaucoma
• D. Indeterminate

Answer: (B)

Moderate-stage glaucoma is defined by more widespread visual field loss than the early stage, typically involving two or more quadrants. On visual field testing you’d expect defects such as arcuate scotomas or nasal steps that cross or extend across the field, often affecting both the superior and inferior parts. Central vision may still be preserved, but the overall field is clearly reduced beyond a single quadrant. This pattern sits between the mild pattern (usually limited to one quadrant) and the severe pattern (extensive loss, often involving central vision and many quadrants). The key idea is that the field loss is extensive enough to involve multiple quadrants, indicating moderate severity.