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A critical period in visual development is a specific timeframe after birth during which the visual system requires sensory input to develop normally. Research by Hubel and Wiesel demonstrated that if an animal is deprived of visual stimuli during this period, the neural connections in the visual cortex can fail to mature properly or can be lost, resulting in permanent visual impairment.

Critical Period for Visual Development

A researcher conducts an experiment on visual system development. Group A consists of newborn animals that have one eye covered for the first few months of life. Group B consists of adult animals that have one eye covered for the same duration. After the covers are removed, which outcome is most likely?

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