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Questions tagged [vision]

For questions about the ability to see or a similar sense.

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3 votes
4 answers
547 views

multiple retinas in one eye

is it possible to have multiple retinas, would there be advantages to this? Or would it just not work at all? I have a diagram (a shitty one) and more explanation if needed Edit: sorry for the ...
spiderwriter's user avatar
9 votes
5 answers
3k views

How many distinct colors would tetrachromatic birds have?

I'm creating a world where the primary conscious species are essentially just ravens. Birds, in general, have tetrachromatic sight (extending in the UV range), meaning they see 4 base colors. My ...
The Zip Creator's user avatar
-3 votes
2 answers
202 views

I have AIs in people's heads. One AI is mischievous. What is a subtle way the AI can mess with its user? [closed]

As it stands currently, there are some people in my world with a neural interface, that replaces one of their eyes. And an AI connects to it. Details aside, the AI can: Read the user's mind Speak to ...
Dalibor-P's user avatar
  • 119
3 votes
1 answer
185 views

What are the factors/conditions that develop blindness in organisms?

I plan that the creatures of my world are usually blind, so they possess sensory organs (barbels) in several variants. The planet where they are found is cloudy and the peat swamps they inhabit are ...
user avatar
0 votes
0 answers
47 views

What features would a creature that could see radio waves have? [duplicate]

What physically apparent features and what organs would a creature that could see radio waves have to have?
ohwilleke's user avatar
  • 11.5k
4 votes
2 answers
143 views

Living in natural satellite having an orbital period of 90 earth-minutes to a gas giant that covers all light. How would animal hunters thrive?

Imagine a earth-like planet where life is beginning to thrive at the bottom of the ocean. So far it is an elegant carbon-based lifeform, not different than the one that has burst in our earth. But ...
Tiago Emanuel Monteiro's user avatar
4 votes
4 answers
2k views

Is there an evolutionary advantage for 12.5% of my mammalian species Homo genus to have blue-green colorblindness?

In my world, there is a species of human called Homo hematophagus (blood eating human). Traditionally, these vampires are a cannibalistic race: In war they often drank the blood from their rivals' ...
mammifereviolet4694's user avatar
3 votes
2 answers
202 views

Do I need magic to change the colors I see?

Basically, I have creatures that are supposed to see all wavelengths of light which are hypothetically visible to biological life, but the way they do this is by changing the photo-receptors in their ...
skout's user avatar
  • 2,068
6 votes
4 answers
2k views

How would vision be affected by eyesockets placed diagonally from each other?

Some owls have ears placed with one higher, and the other lower. If an (otherwise normal) human were to have that sort of thing, only with their eyes sockets (and by extent, eyeballs). For the sake of ...
Blue Skin and Glowing Red Eyes's user avatar
5 votes
4 answers
472 views

What are tetrachromat colors like? [duplicate]

Monochrome vision is easy to describe--each "pixel" only has one dimension, luminosity. Dichromatic vision--what most mammals have--has two channels per pixel. On the physical level, that's ...
Logan R. Kearsley's user avatar
-1 votes
1 answer
105 views

What is the most efficient design for an IR sense organ

Deep beneath the ice-crust of Europa, lies its famous subsurface ocean. Having existed for billions of years, this ocean now harbours a huge range of life forms on its sea floor. However, in trying to ...
user98816's user avatar
  • 8,593
2 votes
0 answers
104 views

Would it be biologically possible to have a species that use a photochromic material instead of an iris to control light intensity?

So in real life there is glasses that use photochromic lens to adapt to the light intensity Would it be biologically possible to have a species that use a photochromic material instead of an iris to ...
Arzack1112's user avatar
1 vote
3 answers
441 views

Would a carnivore that can only see in infrared be an effective predator?

I'm trying to design new animals. One animal I came up with is a type of nocturnal & carnivorous predator that is shaped like a very large wolf. This predator sees in infrared light instead of ...
Rhymehouse's user avatar
  • 3,563
5 votes
2 answers
365 views

How acute can human vision be enhanced to be while retaining the size and shape of the eyeball?

How much more acute could human eyes be biologically engineered to be while keeping the same shape? Animals like eagles have very large eyeballs which due to their size and shape cannot be moved, so ...
Daniel Mazdak Honar's user avatar
-2 votes
1 answer
140 views

A rinnegan's vision [closed]

The Rinnegan has an array of powerful abilities. But im more interested on it's actual visual capabilities. The rinnegan has multiple irises outside of its first one, And multiple limbal rings ...
Kringle_Kryptid's user avatar
11 votes
10 answers
5k views

Under what conditions would a space battle involving a relatively large number of vessels be barely visible on the surface?

Imagine a space battle happening high above Earth (~25k miles, or ~40200 km). It's right above the observers who are standing on the planet's surface. Both armies have the same amount of spacecraft, ...
Mindwin Remember Monica's user avatar
2 votes
1 answer
246 views

Can we "see" through Thermal imaging through the skin?

I've been experimenting with characters with enhanced senses/extra senses and I wonder if it's possible that, through increased sensitivity or special receptors on the skin, someone could perceive ...
Paulo Raposo's user avatar
  • 1,211
3 votes
2 answers
211 views

Sensory Extension Overwhelming? [closed]

Amplifying the sensibility and spectrum of your senses, and even adding new senses altogether, in order to perceive the most information from the environment is a common theme in my futuristic setting,...
Paulo Raposo's user avatar
  • 1,211
0 votes
2 answers
1k views

Where could spirits like ghosts and demons be visible in the electromagnetic spectrum? And how would they be able to do this? [closed]

Heiiii my first question here! Right so I'm writing my story and I was going to make the spirit beings just turn invisible (just classic spirit stuff you know) But after reading in this website a fair ...
Kringle_Kryptid's user avatar
3 votes
1 answer
140 views

Why would a catarrhine species from the Homo genus be MUCH more likely to be colour blind than Homo sapiens?

In my story, there is a species of catarrhinian primate named demons (their scientific name is Homo demonus) (so there are still humans, just not Homo sapiens). They look like a mixture of Afro-...
mammifereviolet4694's user avatar
11 votes
4 answers
2k views

What type of eyes are best suited towards fog and cloud cover?

I am working on a speculative evolution project at the moment that has a low atmospheric scale. As a result, the ground is almost always covered in fog or cloud-like fog that is universal across ...
King of the Hounds's user avatar
2 votes
2 answers
140 views

Blue star vision

For sake of argument, let's assume life did evolve on an earth like planet around a blue star. I have this idea that the animal equivalent life wouldn't have color vision so to let in less of the ...
Joe Smith's user avatar
  • 3,192
8 votes
2 answers
742 views

How would a sky with extreme kessler syndome look like?

A few decades ago the Third World War destroyed Earth. Space infrastructure was considered a priority target by both sides. Orbital space was in the years before the war was filled with skyhooks, ...
TheDyingOfLight's user avatar
5 votes
3 answers
210 views

A species of humanoids can see perfectly well under both sunlight and starlight. What's their eye morphology like?

Assume a species of humanoids that can see under both starlight (no sun, no moon, clear skies) and sunlight as well as humans during the day. Let's assume the light levels are roughly the same as here ...
Mindwin Remember Monica's user avatar
8 votes
3 answers
521 views

Visibility of a Dyson swarm "creature" from its orbiting planet

An alien species has built Dyson swarms around stars which have orbiting planets with primitive life on them. The section of the star which is facing the planet with life is left uncovered to let the ...
user avatar
17 votes
4 answers
2k views

How do I determine when a planet is visible?

Recently, I was working on the various astronomies and astrologies of my fantasy world, when I had an interesting thought: “What if there was a planet that was so faint, people would be arguing if it ...
Alkamede's user avatar
  • 503
-5 votes
2 answers
165 views

Why do minotaur need glasses when their eyes are at the sides?

Minotaur is a race of mythical bipedal creature that is half man half cow, suppose they got integrated into our society due to them being relatively friendly and intelligent so we are starting to ...
user6760's user avatar
  • 47.9k
9 votes
7 answers
2k views

Do you need a new brain to see new colors?

Humans can see 3 colors, sometimes we can see more one color at the same time, this creates 7 variations of colors and a few million different shades of those same 7 colors. blue, red, green = mix ...
Drien RPG's user avatar
  • 383
2 votes
1 answer
172 views

Would we perceive more details if each of our eyes had different color cones?

Usually we have 3 types of color cones namely red, green and blue but 25% of us will have the 4th color cone that is rumored to be able to see 100 million colors that is about 100x more. But what if a ...
user6760's user avatar
  • 47.9k
1 vote
1 answer
375 views

If the blindfold on a healthy old man that was never removed since birth is taken down, would the man recognize what he saw? [closed]

I know our brain somehow managed to upright the inverted images our eyes sees, also there's tons of optical illusions out there that are based on what we knew and experienced. Then if those so called ...
user6760's user avatar
  • 47.9k
1 vote
3 answers
448 views

What's the minimum height of a mountain resolvable to the human eye from 800 miles on a flat Earth?

The Taniquetil / Oiolossë (Mount Everwhite) on the eastern shore of Aman is the tallest mountain on Arda. Far higher than the other Pelóri, it could be seen from the mountain Meneltarma on Númenor ...
Giovanni's user avatar
-2 votes
2 answers
394 views

Can owls, cats and others visual nocturnal animals see in moonless nights?

Im working in a moonless xeno planet and i want nocturnal creatures. I have animals that use smell, ear and touch, but im not sure about vision. I mean, animals and persons need a tiny bit of light ...
Krakukan's user avatar
  • 203
2 votes
1 answer
363 views

Could a 3D film be displayed for a chameleon-sighted viewer?

In my world there are a relatively large and wealthy subset of the population who, instead of a humanoid pair of eyes, have independent eyes like a chameleon. These eyes have the unique lenses, ...
Ichthys King's user avatar
1 vote
2 answers
122 views

Could radiation like Hawking Radiation be used to illuminate an enclosed habitat

While true Hawking radiation wouldn't be useful for illumination, what if, through some sort of strange spacetime warp, we managed to produce, through the same method as Hawking radiation, visible ...
Ichthys King's user avatar
0 votes
1 answer
134 views

Could Hawking radiation illuminate an enclosed habitat?

Could visible hawking radiation be used to illuminate an enclosed space in a way that would be useful to a human? The specific space would be habitable for the human, and be close enough to the black ...
Ichthys King's user avatar
8 votes
3 answers
335 views

Organic reflective optics

Could an animal have eyes like a reflecting telescope, rather than with a lens? The back of this eyeball is a paraboloid mirror, and the retina is a small body on its focal plane. Because the retina ...
Anton Sherwood's user avatar
2 votes
2 answers
103 views

Could an optic chiasma handle faces that share eyes?

A creature has 3 faces, 1 faces left, 1 faces forwards, and 1 faces right. It also has 4 eyes. 2 of these eyes are on the border between the front and side faces, and can be used for stereoscopic ...
Ichthys King's user avatar
17 votes
6 answers
5k views

Could humans have eyes (natural or artificial) capable of resolving bacteria or even viruses on a surface without giving up our current vision?

I've been kicking around story ideas about how much different this pandemic would be if human beings could actually see the virus on our hands, on surfaces, in the air, etc. This lead me to wonder: ...
SRM's user avatar
  • 25.4k
1 vote
1 answer
568 views

How far away can you see a bonfire? [closed]

From how far can you see a bonfire... in clear weather/slight mist/heavy mist, at midday/dusk/night? (assuming an unobstructed line-of-sight)
sesquipedalias's user avatar
7 votes
3 answers
309 views

Extending the visual spectrum -- how far is possible and what would be the benefit?

Earth has animals that have a photoreceptor in the near UV that obviously provides them some sort of benefit. (Given how biological material often glows under UV this might be of hunting benefit.) ...
Loren Pechtel's user avatar
4 votes
1 answer
182 views

Will owls become extinct without airglow?

Given a planet in most ways very similar to Earth (gravity, daylight, atmosphere etc.) with a full transplanted biosphere (all the familiar plants and animals), where the main difference is that as a ...
rwallace's user avatar
  • 4,907
-5 votes
1 answer
89 views

How far can pixie see unaided? [closed]

Flash news: A mysterious creature very much resembles a pixie was killed in a freak accident involving a sparrow, authority suspects no foul play since interviews with the local mythology creatures ...
user6760's user avatar
  • 47.9k
6 votes
6 answers
862 views

Television without primary colors

As humans, we're incredibly lucky that we only see in three primary colors. It makes the development of color displays quite easy. We only need to squeeze three subpixels into a single pixel! What if, ...
forest's user avatar
  • 2,043
2 votes
0 answers
60 views

How could creatures evole without night vision in a dayless world? [closed]

Basically, I want creatures that are as human-like as possible to have evolved on a dayless planet. Nevermind how there could even be lfe, I aready have that covered. I want them to have as close to ...
Username reset's user avatar
9 votes
9 answers
4k views

What would absolute nothingness look like?

In my world, I have these things called 'voids', for lack of a better name. These voids are absolute nothingness. What I'm having trouble with is what they'd look like from the outside. No light = ...
Username reset's user avatar
8 votes
3 answers
573 views

Scaling up compound eyes, is there a size limit?

I'm designing an alien creature that looks insectoid and had a question about compound eyes. The creature is about human in size, maybe a little larger, but I'm wondering if there is a size limit on ...
GemEyes's user avatar
  • 81
3 votes
2 answers
497 views

Can mutated cyclop with 2 conjoined pupils perceive depth?

Imagine a humanoid creature with only 1 eyeball the size of a tennis ball, it has a rare genetic mutation so it had 2 conjoined pupils! I suspect since the 2 pupils are just side by side it would not ...
user6760's user avatar
  • 47.9k
5 votes
2 answers
383 views

How can I cool the body of a human such that it can see Long wavelength IR light without its eyes glowing

The protagonist in my world has its eyes and subsequently its brain altered (genetic alterations from conception) in such a way as to allow it to see into the UV and IR range via the addition of new ...
Ethelachromia's user avatar
4 votes
2 answers
389 views

Evil moon: Part 1 - The explanation

Man in the Moon As humans we have a built-in tendency to see faces in random patterns. On Earth we have a "man-in-the-moon" Image by Luc Viatour. - Original by Luc Viatour, edited by The ...
chasly - supports Monica's user avatar
5 votes
2 answers
412 views

What does a timeflow-doubled superhero see?

I was just bitten by a radioactive stopwatch, gaining the voluntary ability to experience time at twice the usual rate. While doing so, for every second of real time, two seconds occur within my body. ...
Foo Bar's user avatar
  • 488