Not one of the five patterns of vision loss?

• A. Dry eye syndrome
• B. Central field defect
• C. Peripheral field defect
• D. Reduced acuity

Answer: (A)

The concept being tested is how vision loss is classified by where and how the vision is affected, not by separate eye conditions that can blur the image. A central field defect describes loss or impairment in the center of the visual field, a peripheral field defect describes loss along the outer edges, and reduced acuity refers to a general drop in sharpness of vision. These are pattern-like descriptions used in vision rehabilitation to categorize how vision is impaired.

Dry eye syndrome, on the other hand, is an ocular surface condition. It can cause intermittent blur or discomfort, but it does not map to a specific pattern of field loss. Therefore it isn’t considered one of the five patterns of vision loss.