Question

Following perimetry image is suggestive of?

• A. Extension of blind spot
• B. Arcuate scotoma
• C. Reinee step defect
• D. Altitude Anopia

Hint:

An extension of the blind spot is often seen in optic nerve-related pathologies, including glaucoma.

Answer 1

The Correct Option is A

To solve the provided question and identify the condition suggested by the perimetry image, we need to understand each option and relate it to typical visual field defects seen in perimetry.

• Extension of blind spot: This occurs when the normal blind spot, which is the physiological scotoma where the optic nerve exits the retina, becomes enlarged. This can be detected on a visual field test as an increased area where the patient does not perceive stimuli.
• Arcuate scotoma: This is a visual field defect characterized by an arc-shaped loss of vision, often associated with damage to the nerve fibers in glaucoma.
• Reinee step defect: More commonly known as a "step defect," it typically describes a sharp demarcation between normal and defective visual fields, also associated with nerve fiber damage.
• Altitude Anopia: A condition where there is a loss of vision in half of the visual field, usually affecting either the superior or inferior half.

The correct answer is Extension of blind spot. When a perimetry image suggests this condition, it generally shows an enlargement of the normal physiological blind spot beyond its typical size, indicating possible pathological changes.