Which of the following is one of the five patterns of vision loss?

• A. Glaucoma progression
• B. Color vision deficiency
• C. Binocular diplopia
• D. Central field defect

Answer: (D)

Patterns of vision loss describe where in the visual field the impairment occurs, which drives how a person functions and what rehabilitation strategies are most helpful. A central field defect is a pattern because it specifies that the loss is concentrated in the center of the visual field, where high-acuity vision is used for tasks like reading, recognizing faces, and detailed work. Understanding this location helps clinicians choose interventions such as eccentric viewing strategies and magnification to compensate for central vision loss.

The other options don’t fit as a pattern of vision loss in this context: glaucoma progression refers to a disease process that can cause various field losses over time, color vision deficiency concerns color discrimination rather than where in the field the loss occurs, and binocular diplopia is double vision due to misalignment rather than a field-location pattern.