Which Morgan's norms triple corresponds to Distance BO smooth vergences?

Which Morgan's norms triple corresponds to Distance BO smooth vergences?

• A. -----/7/4
• B. 9/19/10
• C. 13/21/13
• D. 17/21/11

Answer: (B)

Morgan's norms give standard reference values for how the eyes should vergence at distance, including the smooth base-out (divergence) response. When we look at Distance base-out smooth vergences, the normative triplet in the NBEO context is 9/19/10. That specific pattern is the one used to represent the typical distance divergence range and how it unfolds, so it matches the expected distance-base-out smooth vergence values. Other triplets correspond to other vergence conditions (like near or base-in responses) and therefore don’t fit Distance BO smooth vergences.

Morgan's norms give standard reference values for how the eyes should vergence at distance, including the smooth base-out (divergence) response. When we look at Distance base-out smooth vergences, the normative triplet in the NBEO context is 9/19/10. That specific pattern is the one used to represent the typical distance divergence range and how it unfolds, so it matches the expected distance-base-out smooth vergence values.

Other triplets correspond to other vergence conditions (like near or base-in responses) and therefore don’t fit Distance BO smooth vergences.