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Don't rush to conclusions. This is a serious question.

The most widespread depiction of intelligent, "human-like" aliens are that of a species with considerably larger eyes in proportion to body size vis-a-vis human beings (just google alien and select images and you will see what I mean). Example:

enter image description here

Now, say we were to find a race of alien with such characteristic. Assuming their form of life is based on evolution as we know it, what could we deduce about their needs and environment based solely on such information? (i.e. that their eyes are larger than ours, ceteris paribus).

In other words, according to our scientific knowledge of life on Earth, why might alien have relatively large eyes?

This article suggests animals have big eyes because of their primarily night activity, being in places with little light (e.g. deep under the ocean), or because of better 3D range. But I would like something more scientific. The article is a bit "pop".

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closed as off-topic by David, Remi.b, kmm, anongoodnurse, Bryan Krause Jan 11 at 17:47

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    $\begingroup$ I'm voting to close this question as off-topic because it is not a biology question. It would maybe be accepted on worldbuilding.SE $\endgroup$ – Remi.b Jan 11 at 16:46
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    $\begingroup$ You already answered your own question. Improved visual acuity is the most likely answer. Primarily opinion based since no aliens or their environs are available for study. $\endgroup$ – anongoodnurse Jan 11 at 17:40
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    $\begingroup$ @anongoodnurse amazing capacity for thinking beyond the box. Building hypothesis based on extrapolation from observed phenomena is surely part of the activity of a scientist. $\endgroup$ – luchonacho Jan 11 at 18:57
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    $\begingroup$ IKR? "Building hypothesis based on extrapolation from observed phenomena is surely part of the activity of a scientist." Of course it is. Ask an easy question and you'll get an easy answer. @jamesqf: Eye size to body weight is probably more important. This cute little guy looks quite like the aliens above to me. $\endgroup$ – anongoodnurse Jan 12 at 3:28
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    $\begingroup$ There are two non-exclusive plausible biological explanations for the big-eyed images of aliens: a) The big eyed face is similar to the visual pattern that a newborn would see of its mother. It hence could represent an imprinted filter (skeptic.com/reading_room/close-encounters-of-the-facial-kind). b) Culturally, aliens are often depicted as humans with exaggerated properties that are often psychologically associated with intelligence ( web.archive.org/web/20100915203009/http://www.theness.com/… ) $\endgroup$ – tsttst Jan 13 at 2:15

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