Questions tagged [vision]

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

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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 ...
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8 votes
2 answers
546 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, ...
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5 votes
3 answers
162 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 ...
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8 votes
3 answers
493 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 ...
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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 ...
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  • 173
-5 votes
2 answers
143 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 ...
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10 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 ...
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  • 374
2 votes
1 answer
112 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 ...
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  • 46k
0 votes
1 answer
323 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 ...
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1 vote
3 answers
286 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 ...
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-2 votes
2 answers
158 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 ...
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  • 203
2 votes
1 answer
349 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, ...
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  • 11.7k
1 vote
2 answers
111 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 ...
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  • 11.7k
0 votes
1 answer
125 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 ...
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8 votes
3 answers
286 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 ...
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2 votes
2 answers
92 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 ...
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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: ...
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0 votes
1 answer
156 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)
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5 votes
3 answers
225 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.) ...
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4 votes
1 answer
164 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 ...
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  • 4,376
-5 votes
1 answer
75 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 ...
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7 votes
6 answers
819 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, ...
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  • 1,715
2 votes
0 answers
58 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 ...
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  • 21
4 votes
8 answers
518 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 = ...
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  • 49
8 votes
3 answers
279 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 ...
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  • 81
3 votes
2 answers
480 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 ...
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  • 46k
5 votes
2 answers
265 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 ...
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4 votes
2 answers
118 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 ...
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5 votes
2 answers
361 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. ...
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  • 364
7 votes
2 answers
1k views

Vampire vision comparable or superior to human vision at night

I'm writing a story about the supernatural, except with as few "explained by magic" elements as possible. In the case of vampires, I want them to look as similar to humans as possible while being able ...
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  • 371
6 votes
1 answer
155 views

What can merfolk use to see in the abyss?

A particular species of merfolk inhabit the abyss of the pacific ocean, they belonged to the secret clan which was tasked by the Atlantean emperor to seek immortality elixir. The emperor ordered their ...
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  • 46k
12 votes
1 answer
2k views

How does a creature evolve to become invisible to night vision goggles?

I am wondering if a species might evolve to deceive human technology - in particular, a set of night vision goggles. I imagine it is either cold blooded or it has thick fur - which doesn't trap air - ...
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  • 46k
3 votes
3 answers
226 views

Feasibility of non lethal "x-ray" false-colour vision?

One of the powerful abilities of Superman is his ability to make several layers of opaque solid objects translucent to him and only him alone. What plausible future technology would allow us to see ...
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  • 46k
10 votes
8 answers
1k views

What is the scientific basis for yellow, bioluminescent eyes?

I've seen many concept arts of aliens that have some sort of glowing bioluminescent pupil-less eyes. I'm inventing a creature that has yellow glowing eyes like that and can see in the dark. My ...
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  • 121
5 votes
2 answers
115 views

Could a dichromatic animal distinguish red and green but not blue?

If a dichromatic mammal had better night vision than a human, including tapetum lucidum, could they see large (red) and medium (green) light wavelengths but not small (blue)? Would something similar ...
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  • 353
7 votes
3 answers
272 views

Could a dichromatic animal see red?

So I'm not really sure whether I get it right or not, but apparently most mammals are dichromatic. Humans have three cones that detect light wavelengths, small for blue, medium for green, and large ...
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  • 353
28 votes
5 answers
5k views

A fast aquatic predator with multiple eyes and pupils. Would these eyes be possible?

I’m currently in the works of an alien design, one which lives in the ocean most of its life and occasionally surfaces in shallow waters to mate. It has 4 eyes, with each side of the head having a ...
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  • 1,596
6 votes
4 answers
470 views

Cool way to see through fog and darkness

My planet is frequently set with thick fog. What is the best way to have its residents see accurately? One species called Hell Fires fall from the sky, landing on top of prey and killing it. How ...
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7 votes
5 answers
298 views

Why would a blind creature evolve display features?

I'm thinking of a predatory creature that lives deep inside large caves. Because this environment is so dark, the creature's eyes have disappeared through evolution since the creature relies on ...
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  • 71
11 votes
7 answers
3k views

How to evolve human-like eyes that can stare at the sun without protection?

Imagine a species that is very much like humans in shape, size and physiology. But they are able to stare at the sun for long periods without suffering any harm, and without needing any artificial ...
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9 votes
3 answers
554 views

How large would a circular wall need to be to appear straight?

How large (in terms of height and radius) would an outdoor circular wall (like a city wall on a colossal scale) need to be before a casual observer would perceive the wall as "straight"? I found "...
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44 votes
19 answers
9k views

How to get cool night-vision without lame drawbacks?

In this scenario, I would like to focus specifically on humanoids (read: human shaped blinking eyes, protected by eye-lashes and evolved in a waterless environment and fitting human eyesockets, from ...
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  • 541
31 votes
10 answers
6k views

Non-aqueous eyes?

I am trying to create an organism that can survive in space for short periods, but I realized that I can't have its eyes be similar to those of most animals and humans because they would boil in space....
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  • 3,186
1 vote
5 answers
631 views

Could a camera on a sniper rifle see the kill? [closed]

We are in the a slightly gritty future. There is space travel, but technology is reasonable. People still shoot bullets and not lasers. Vehicles are powered by nuclear reactors and not magic space ...
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  • 4,922
36 votes
12 answers
7k views

What does the view outside my ship traveling at light speed look like?

World Rules: Travelers are able to move at the speed of light without disruption of their lives. Time passes "normally" for them. They think, breathe, love, cry, and steer the ship as if they were ...
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6 votes
3 answers
759 views

What would a car look like for an animal with eyes on the side of their heads?

Imagine an animal like a cow in regards to eye positioning; they can look forward to lessen their frontal blindspot a bit but assume that doing that for a prolonged amount of time is straining. What ...
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  • 1,141
8 votes
3 answers
1k views

Would color changing eyes affect vision?

I am writing a medieval fantasy story in which there is a race of humanoids who have multicolored eyes. Their eyes may change to bring out one color or another if they are experiencing very stressful/...
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41 votes
23 answers
10k views

What would be the ideal power source for a cybernetic eye?

After nearly a decade of development and public prototypes, the Mizaru company is ready to unveil the cybereye. A fully cybernetic eye that provides its user/host with high definition vision, enhanced ...
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19 votes
14 answers
3k views

Would an alien lifeform be able to achieve space travel if lacking in vision?

Think of this alien life form as something resembling earth bats, placed in a planet with Earth-like conditions. Micro-bats have small and poorly developed eyes. Similarly, this alien species is ...
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  • 237
8 votes
4 answers
1k views

How fast would a person need to move to trick the eye?

Say superheroes in a certain world have somewhat less overpowered abilities. A strong super might be able to lift a few tons, but not stop speeding trains or pick up an entire semi. Unlike the Flash, ...
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