Which statement defines Positive Relative Vergence (PRV)?

Which statement defines Positive Relative Vergence (PRV)?

• A. The amount of convergence that can be stimulated from the resting position
• B. The amount of convergence that can be stimulated in response to a target position
• C. The amount of convergence that can be stimulated relative to the position of the target
• D. The amount of divergence that can be stimulated relative to the target position

Answer: (C)

Positive relative vergence is about how much the eyes converge as the target changes position. It’s a measure of the change in vergence that is produced relative to where the target is located. In other words, it looks at how much convergence is stimulated when you move the target from one distance to another, referencing the target’s position itself. This distinguishes it from simply the baseline vergence from rest (which would be absolute, not relative) and from divergence. The correct statement captures that the amount of convergence is defined in relation to the target’s position.

Positive relative vergence is about how much the eyes converge as the target changes position. It’s a measure of the change in vergence that is produced relative to where the target is located. In other words, it looks at how much convergence is stimulated when you move the target from one distance to another, referencing the target’s position itself. This distinguishes it from simply the baseline vergence from rest (which would be absolute, not relative) and from divergence. The correct statement captures that the amount of convergence is defined in relation to the target’s position.