HOSA Human Growth and Development Practice Test - Prep & Practice Exam

Nystagmus typically appears in the infancy stage because it is a common condition characterized by involuntary eye movements. In infants, these movements can be more noticeable as their visual and motor systems are still developing. This is a time when the brain is learning to coordinate eye movements and fixate on objects, which can lead to temporary nystagmus as part of that developmental process.

In contrast, while nystagmus can occur at any age, it's especially prevalent in infancy due to the rapid changes occurring within the visual system. As individuals grow older, the instances of congenital nystagmus or those related to other conditions may remain, but the peak incidence is observed during the early developmental stages.