/sci/ - Science & Math

[Anonymous No.11465122]

Why do so many people need glasses nowadays? How did people throughout history survive without that kind of technology

[Anonymous No.11465124]

squinting

[Anonymous No.11465133]

>>11465122
The rate of poor eyesight is likey higher than ever. That being said there is still many things you could do before modern tech. Shit shoveller, and such. Also you could pop out a few babies at a younger age even before you go totally blind.

[Anonymous No.11465134]

>>11465124
I kind of gathered this when reading about different cultures; people with a 'squint' were essentially disabled. Still makes me wonder, i tried driving (empty road) without my glasses and although i could see the general road ahead and large, obvious thngs, was really surprised at how much I was missing, plus any quick-moving things that could easily pass me by.

I guess i'm just wondering if we've "trained" ourselves to have poor vision in modern times, staring at books/screens near us from early age or something

>sorry for the run-on

[Anonymous No.11465137]

People didn't read or watch TV or drive cars, threw pointy sticks at wooly mammoths.

[Anonymous No.11465140]

>>11465133
True, I guess I'm kind of surpprised that good eyesight has not been selected for more strongly. In terms of evolution, not being blind seems like a big deal

[Anonymous No.11465143]

>>11465122
People read more from an early age nowadays. Ths results in a lot of becoming myopic either purely from the enviroment or gene-enironment interactions.
The fact that only a small minority of myopic people were myopic since birth supports my argument.

[Anonymous No.11465147]

>>11465122
People didn't need good vision back in the day and they didn't give a fuck either.

[Anonymous No.11465149]

>>11465122

[Anonymous No.11465151]

>>11465147
>Why are your eyes always so squinty, old man?
>Mine eyes are so good i only need to see through but a bit of them.

[Anonymous No.11465153]

>>11465143
Tell me more about gene-environment interactions?

Or you mean some kind of epigenetic trait being passed down, but that would still be apparent at birth

>mfw i didnt even realize i needed glasses for months until the school just happened to give eye exams and then when i wore glasses for the first time i was like wtf i can finally see the goddamn chalkboard lel

[Anonymous No.11465154]

>>11465149
very comfy, i like it

[Anonymous No.11465156]

>>11465122
Indoor eye focus = shit nearsighted.

[Anonymous No.11465157]

>>11465153
Basically eyestrain so hard that you eye muscles get rekt. But that's not real myopia. Real myopia is about shape of your eyeball or cornea, stuff you're born with.

[Anonymous No.11465159]

>>11465137
They also didn't read fine print in the stone age, and the younger members would hunt for the small number of old people that lived long enough for their eyesight to fail. If someone was born with poor eyesight, or blind or deaf, they were just unlucky.

[Anonymous No.11465167]

>>11465159
They didn't need good vision

[Anonymous No.11465169]

>>11465122
literally because people stay in doors and read books/use computers. There is nothing genetic about people using glasses its because the eyes development is being stunted.

[Anonymous No.11465181]

>>11465169
This has definitely happened to me because my dad is actually far-sighted and I'm near sighted. FUCK

[Anonymous No.11465185]

Good stuff, thanks for the discussion peeps.

[Anonymous No.11465201]

>>11465122
to hunt you only need to see motion
but to forage you need to see the berry
more people hunt today than forge the berries

[Anonymous No.11465207]

>>11465147
>have shitty vision
>don't see Grug or smilodon in time
>die
Epic

[Anonymous No.11465216]

>>11465207
Motion vision is largest aspect of anything physical and doesn't involve clear outlines or colours. You only need vision as good as a cat's to do anything physical and cats have pretty bad vision.

[Anonymous No.11465218]

https://youtu.be/k9dNH4tcNjU

[Anonymous No.11465219]

>>11465216
In fact vision is on a ratio between motion detection and colour vision. The better you have of one the worse you have of the other. That's why it's far more likely for men to be colorblind. Less colour means better motion detection and men did all the hunting in hunter-gatherer society.

[Anonymous No.11465231]

>>11465219
Basically having shitty vision is manly but only if it's colorblindness or genetic far-sightedness.

[Anonymous No.11465237]

>>11465122
Glasses are now a fashion accessory. I was shocked when I meet my (ex)girlfirend, wearing fake glasses.

[Anonymous No.11465326]

>>11465122
We're becoming taller, but our eyes aren't getting bigger.
Also we're using glasses instead of letting genetically inferior people not breed.

[Anonymous No.11465358]

I've read and used computers intensely from the time I was a toddler, but now (all the way at 30) I still have better than 20/20 vision.

Not that I'm complaining, but what gives? Is the "close up detail stuff is bad for your vision" an old wives' tale, or what weird genetic quirk do I have or thing might I have been doing to offset it?

[Anonymous No.11465364]

>>11465358
You're probably just giving your eyes time to rest. It's the muscles that focus your eyes that get worn out.

[Anonymous No.11465377]

>>11465122
Ironic to ask that as you're staring at a glowing screen less than 2 feet from your face.
>>11465137
>it's because of books and television
Yeah because books and tv were just invented in the last 20 years....
Retard.

[Anonymous No.11465401]

Myopia is primarily genetic but there are epigenetic factors controlled by exposure to bright light (sunlight) during adolescence which results in higher cases in modern society where young people are spending more time indoors for study/leisure at those ages.

Also we actually check it a lot more these days and it's become more accepted. If your eyesight is only slightly bad and you can still get around you probably wouldn't have bothered with glasses even a couple decades ago. Myself and plenty of people I know wear glasses and only have mild prescriptions (-1.5 or less), they're just a lot easier to get these days and we're constantly reading, so it helps reduce eye strain. Going back to my school days or when I worked at a cafe I never bothered wearing my glasses, I only started wearing them regularly when I entered the 'adult' workforce.

[Anonymous No.11467171]

>>11465122
Turns out staring at flat surfaces all day long with eyes tuned to complex 3D environments fuck up their optics, who would have guessed? Blue monitor light only adds insult to injury.

[Anonymous No.11467175]

>>11465401
I'm not sure if it's epigenetic but if it is that's kind of good because your children will be more resistant to eyestrain after you've ruined your eyeballs.

[Anonymous No.11467184]

>>11465140
I had good eyesight in my early life but slowly its been getting worse and i have had to go through alot of prescriptions so its not like they werent able to live their life normally for a short time

[Anonymous No.11467189]

>>11467175
I guess any epigenetic modifications to your eyeball muscles would have to work their way into your gametes somehow so not likely.

[Anonymous No.11467192]

>>11465122
>How did people throughout history survive without that kind of technology
They didn't

[Anonymous No.11467350]

>>11465207
>tfw when you realise if you had shitty vision you wouldn't have been put on smilodon alert duty and that roles where specialised even then.

[Anonymous No.11468570]

>>11467350
>retard on smilodon duty fucking dies
>need to find a replacement fast
>put blind retard on smilodon duty
>he dies because blind

[Anonymous No.11468737]

>>11465122
Possibly a nutrient deficiency. Manganese, copper and chromine have been proposed, iirc.