Which function is least likely to be a primary focus of ABV testing battery?

Which function is least likely to be a primary focus of ABV testing battery?

• A. Phorias
• B. Vergence ranges
• C. Color vision
• D. Suppression

Answer: (C)

The main idea is how well the two eyes work together, both in turning to align targets and in maintaining single binocular vision, plus how the brain fuses the images. That’s what ABV testing batteries emphasize: phorias to reveal latent misalignment, vergence ranges to measure how well the eyes converge and diverge for near and distance, and suppression to see if the brain is ignoring input from one eye to avoid double vision. Color vision, on the other hand, is about chromatic discrimination and color processing, not about binocular coordination or fusion. It isn’t a core measure of how the eyes align or fuse images, so it’s least likely to be a primary focus of an ABV battery.

The main idea is how well the two eyes work together, both in turning to align targets and in maintaining single binocular vision, plus how the brain fuses the images. That’s what ABV testing batteries emphasize: phorias to reveal latent misalignment, vergence ranges to measure how well the eyes converge and diverge for near and distance, and suppression to see if the brain is ignoring input from one eye to avoid double vision.

Color vision, on the other hand, is about chromatic discrimination and color processing, not about binocular coordination or fusion. It isn’t a core measure of how the eyes align or fuse images, so it’s least likely to be a primary focus of an ABV battery.