Binocularity, the ability to fixate on one visual field with both eyes simultaneously, is normally present by what age?
a. 1 month c. 6 to 8 months
b. 3 to 4 months d. 12 months
ANS: B
Binocularity is usually achieved by ages 3 to 4 months. Age 1 month is too young for binocularity. If binocularity is not achieved by 6 months, the child must be observed for strabismus.
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