Dark adaptation and Night vision

Dark adaptation noun - The process of adjusting the eyes to low levels of illumination; cones adapt first; rods continue to adapt for up to four hours.

Night vision and dark adaptation are semantically related. in visual adjustment to darkness topic. In some cases you can use "Night vision" instead a noun phrase "Dark adaptation".

Night vision noun - The ability to see in reduced illumination (as in moonlight).

Dark adaptation and night vision are semantically related. Sometimes you can replace phrase "Dark adaptation" with "Night vision", this phrases are similar.