Which visual function reaches adult levels earliest after birth?

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Multiple Choice

Which visual function reaches adult levels earliest after birth?

Explanation:
Temporal processing develops earlier than the other visual functions. The ability to detect flicker (flicker fusion frequency) reflects the temporal channel, which matures quickly after birth, so this function reaches adult-like values sooner than the others. Contrast sensitivity (spatial detail) continues improving over many months, stereopsis (depth from binocular cues) begins a few months after birth but takes years to fully mature, and Vernier acuity (high-precision alignment) develops much later in childhood. So the flicker fusion threshold is the earliest to approximate adult levels.

Temporal processing develops earlier than the other visual functions. The ability to detect flicker (flicker fusion frequency) reflects the temporal channel, which matures quickly after birth, so this function reaches adult-like values sooner than the others. Contrast sensitivity (spatial detail) continues improving over many months, stereopsis (depth from binocular cues) begins a few months after birth but takes years to fully mature, and Vernier acuity (high-precision alignment) develops much later in childhood. So the flicker fusion threshold is the earliest to approximate adult levels.

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