The white balance of your eyes...

Are your eyes different from each other?

white-balance

People have been thinking about how we perceive the world since the dawn of time. You can go all the way to ancient philosophy, with Plato’s Allegory of the Cave, for example, where Plato wonders whether if you never saw the ‘real’ world, whether you would know. Or, indeed, even care.

The senses are curious, because how would you know whether you see the world the same as somebody else? To me, for example, the rainbow never really made much sense: Sure, it looks the way I have always seen it, but that doesn’t mean it makes any sort of logical sense. How do I know, for example, that what I think of as ‘red’ isn’t what the rest of the population sees as ‘blue’. Of course, I’ve been pointing at colours and naming them since I was barely able to talk, so it’s pretty well-ingrained that ‘red’ is ‘red’, and that ‘orange’ is ‘orange’… But what if they aren’t?  

Deep philosophy about the very core of colour theory aside, I know for a fact that I don’t see the world the same as other people. Specifically, I know that what I see isn’t the real truth, because both of my eyes are giving me a different impression. Yes, really.

Two eyes, two realities

I noticed many years ago that my eyes are subtly different from each other: My left eye has a ‘colder’ colour balance than my right eye. I’ve spent a bit of time experimenting, and it appears that there is about an 800 kelvin difference between the two. That means that if I look at the left photo with my left eye, and the right photo with my right eye, these two look identical:

It’s been a bit of a curiosity for me for a while, and a while ago, I tweeted about it. As a result, I got a pretty big response, with the vast majority of responders saying something along the lines of “omg, me too!”.

That got me to thinking… Seeing as both my eyes are different from each other, there’s a 100% chance that one of them is ‘incorrect’. On the other hand, there’s nearly as big a chance that both my eyes are ‘incorrect’. Of course, white balance can be measured objectively, but ultimately, as photographers, we make a subjective judgement call on how we want to white balance our photos.

How can you test it?

Honestly, I have no idea how you can test it scientifically – but I find it’s most noticeable when I’m indoors, in medium-to-low light (presumably because my pupils will be bigger, but I have no physiological explanation for why this might be the case). Hold a hand in front of one eye, then move it to the other. You’ll see the picture ‘jump’ slightly to the side, but if your eyes differ from each other, you’ll also see the colour temperature change slightly.

So what does that mean to me as a photographer?

Nothing, I think. There are ways you can correct for your colour vision, apparently (you can wear slightly tinted glasses or contacts, for example), but ultimately it makes very little difference: Your eyes are absolutely incredible at capturing light, and your brain can handle colour balancing perfectly fine most of the time. In fact, your eyes / brain combination is vastly superior in this respect than a camera / computer combo.

I just think of it as a curiosity, and secretly, somewhere deep inside, I’m quite pleased that nobody in the whole world sees their surroundings exactly identically to what I do.


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Comments

Anonymous
Anonymous

Man! I laughed at first and when I saw that with my left eye left image looks fine I laughed even more. i think I have exactly the same difference like you :D

Anonymous
Anonymous

I noticed this only a few months ago. It’s kind of weird. I still haven’t decided whether it is a permanent thing, or something that just happens after one eye has had more of a different light source in it than another (if you know what I mean).

Anonymous
Anonymous

I tried looking at each photo with each eye, and there is a barely perceivable difference between the two eyes. I’m not really up on color temperatures, but the sky appears very slightly darker with my right eye.

Anonymous
Anonymous

They look exactly the same to me. I feel speshul. :D

Anonymous
Anonymous

I diverged my eyes, and aligned the two images, on the off chance that the photos were 3D on top of being color shifted. This makes me a giant nerd, and I’m ok with that.

Anonymous
Anonymous

I definitely have a slight difference between my eyes, but I can’t actually tell if it’s a white balance difference, or just an overall exposure difference. As someone who is definitely right-eye dominant, I think my right eye might just be more sensitive to light.

More interesting to me was the discovery that if I free fuse your example example images, as if it were a Stereogram, I get a clear impression of true depth. Amazes me that a simple change in white balance would bring that about.

Anonymous
Anonymous

Perhaps the difference is there by design, so that there is more data for the brain to compute the perception of reality?

Anonymous
Anonymous

I’ve noticed this in the past as well, though like Jacob, I’m not sure whether it really is a permanent bias or just a result of one eye having had different light conditions than the other in the past few minutes. I notice this very well when I’m in very bright conditions and I close one eye to keep out the light.

After a few minutes my one eye will see very blue, while the other will see rather red. Then when I close my other eye, a few minutes later the situation will be reversed.

Anonymous
Anonymous

Mine are the same as yours, colder on the left. I think what you are experiencing here is the normal ‘imperfection’ of physiology.

As we age, our corneas become more yellow – which is why designers should never use yellow typefaces on white for a target audience of pensioners, and why my octagenarian father prints horribly blue images on his cheap printer. Ok, he oversharpens the life out of everything too, but you get the drift.

I’d guess that in low light, your more open iris means that what you see has passed through a greater quantity of your lens picking up more tint.

I’ve wondered about this a lot whilst calibrating my monitor. Should I move away from colour prints by the time I’m sixty and stick to black and white?

As a related issue, 8% of men are colour blind. How many photographers have tested themselves?

Anonymous
Anonymous

The lens of your right eye may be more yellow than your other lens. As you age the lenses yellows and gets more ridged, the loss of flexibility is why people have to start wearing bi or tri focal lenses.

:)

Anonymous
Anonymous

My left eye has always seen everything as much “brighter” than the right. I don’t know if it has anything to do with it, but every time I’ve ever gone out into bright sunlight, I’ve sneezed.

Anonymous
Anonymous

Hey, I get that too, Ross – and we’re not alone. According to Wikipedia: Photic sneeze reflex, also known by the backronym Autosomal Dominant Compelling Helio-Ophthalmic Outburst (ACHOO Syndrome), is an autosomal dominant hereditary trait which causes sneezing (due to naso-ocular reflex [2]) when suddenly exposed to bright light, possibly many times consecutively. The condition affects 18-35% of the human population.

Anonymous
Anonymous

To the author of the article, and others who experience something similar: consider having your eyes checked for cataracts. They’ve got a yellow tint to them and can easily explain this sort of difference in color balance.

I doubt it’s something to panic about, but I’m sure you and your opthamologist would both appreciate the inquiry now rather than later.

Cheers,

b&

Anonymous
Anonymous

Ahh, color balance. Funny what your camera (or different lights) can do. If you’re interested in seeing how famous photographers light their images, check out:

GuessTheLighting.com

Anonymous
Anonymous

Yepp, the same here. I’ve noticed this already at school, just remember me sitting in biology, asking the teacher whether that’s normal and he didn’t know :)

Anonymous
Anonymous

Wow, I didn’t about this. I’m going to test it out later. Thanks. Great article.

Anonymous
Anonymous

They look exactly the same to me. I feel speshul. :D

Anonymous
Anonymous

The vote is pretty cool, but I would not wonder if most of the people who do not have equal color balance do wear glasses… the perception of light is altered because of myopia/hyperopia. :)

Anonymous
Anonymous

I’ve noticed a difference, and i’m currently researching…that ‘s how i found your website… My question is, if people that are right eye dominant, do you see the world in a darker perspective, and vica versa?

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