Which of the following starts to develop the latest after birth?

• A. Accommodation
• B. Divergence
• C. Stereopsis
• D. CFF

Answer: (C)

Depth perception from binocular input tends to be the last to emerge after birth because it depends on precise eye alignment and the brain’s ability to fuse two slightly different images into a single percept. This binocular integration and processing of disparity mature gradually, starting around a few months and continuing to refine through the first year. In contrast, basic focusing (accommodation) and eye alignment (divergence) rely on more primitive reflex-like control that develops earlier, and temporal vision measured by flicker fusion frequency improves relatively early as the visual pathways mature. So the function that begins developing latest is stereopsis, the perception of depth from binocular disparity.