This is going to surprise a few of you. Left with and right without:
Wait, the lens flare effect is because of my astigmatism?
Yep! I found out on reddit, lol.
It’s because old movie cameras had astigmatism.
Well, some old movie cameras. That movie-makers decided to be passionate about.
He didn’t believe me.
That’s just the way things look. ¯\_(ツ)_/¯
You can’t convince me there’s people without the amazing starburst effect, just like you can’t convince me there’s people completely devoid of internal monologue.
Mine doesn’t look exactly like the image on the left. It’s more of an X pattern.
And that’s WITH glasses or contacts.
Ooooh look at Mr. Fancy pants over there with his special astigmatism. Meanwhile we’re all stuck with the regular astigmatism.
Joking aside, that’s pretty interesting.
Mine are more like crosses which leads me to ask, why are they different?
I’m not an eye doctor - just a guy with astigmatism in both eyes… But my understanding is that astigmatism can happen in multiple ways because it is due to the eye being non-spherical, etc.
Meanwhile, there are limits to what glasses or contacts can do to correct this. Only so many ways a lens can bend light at one time.
I think that’s what leads to people seeing different things, even with glasses on, when it comes to visual distortions like starburst patterns around lights.
With glasses the lights just hurt with darker glasses hard to see, without one see the one on left. All hard choices.
TIL left isn’t how everyone sees it.
European here, the fuck are y’all talking ’bout. I have astigmatism and LED headlights are godsend, especially low beam. They have automatic leveling which prevents blinding if you put something in the trunk, the beam is wider and more controlled than from a lightbulb and the cutoff is razor sharp. Don’t get me started on automatic high beams with zones, like magic.
I just wonder if your experience is not swayed by illegal LED retrofits.
All of that stuff that helps people from getting blinded is actually illegal here in the states. Those high beams with zones? Illegal I would love for that stuff to come here but currently we just get fucked in the eyeballs seemingly for fun
The problem in the States is all of the brodozers with their headlights up so high they are shining directly into your eyes. With them being so obnoxious it’s all we remember when we think about LEDs.
Id rather blame it on beam shape which in your cars are symmetrical and designed to shine straight onto opposing drivers face. Here I immediately see at night that incoming traffic is a car with LEDs because they blind me less - you must come here to believe me I guess, but check what beam shape is by law mandated in the EU. And it is much much easier to control the beam shape exactly like you want it with multi-LED headlights.
Led or not, having the wrong light adjustment (height, beam shape, etc) will fail your inspection in most EU countries.
But this led trope is a regular online… I imagine in the US they are doing all kinds of crazy shit with high power leds, because freedom or something. Damn EU gob’mint, preventing people from blinding me!
I… I don’t think we test headlight adjustment during inspections in the US. At least, not in the states I’ve lived.
That would explain these kind of posts…
I think the post is about being on the recieving end of them, not being the user.
Same as the comment you replied to.
If that’s your vision, y’all need glasses.
I have astigmatism. My glasses correct it. Led lights are fine.
Eyeglass prescriptions that correct for astigmatism have one “axis” or direction that can be specified. Real astigmatism can be vastly more complex than a single diopter adjustment in one direction. This makes many real astigmatism cases effectively uncorrectable.
Is it unfixable with lenses or only unfix able without lenses custom designed for your eye?
If that makes sense
To correct any possible astigmatism, it would require an infinite sum of series of correction terms at different angles and strengths.
But every glasses prescription I’ve ever gotten in the United States cuts that series off at one term. I’ve never seen nor heard of anyone getting custom lenses with two or more axes. It seems like it should be theoretically possible, but I also know very little about the process of lens grinding.
My understanding is that it’s just a limitation of the physical medium of a glass (or plastic) lens. There’s just only so much it can do - and only so many directions a lens can bend light at the same time before it enters your eye.
I have no complaints, despite the persistent starburst around lights at night. It’s not that big a deal. And I’ve never seen them any other way, after all.
My only other quibble is that my prescription makes everything look a little bit wider than it actually is. Either that, or my astigmatisms (one in each eye, and different from each other too!) make everything look more narrow than it really is? I’ve never really been sure….
We just need to fix out football shaped eyes instead of trying to correct it.
Oh yeah. The starburst patterns absolutely are an unavoidable artifact of the axis correction in the lens. They are the result of diffraction doing Fourier optics on point light sources through an anisotropic (non-directionally symmetric) lens system.
As an example, here’s the James Webb Space Telescope, which has a hexagonal starburst pattern because its primary mirror is composed of hexagons (I believe the smaller horizontal spike is from the secondary mirror support strut):
Sorry, but you’re wrong. I’m happy for you everything works but for lots of people they can either have clear eyesight or no issues with light sources in the dark.
And damn, those glasses are expensive!
LED headlights are godawful astigmatism or no. Whoever invented them should be made to stare directly into the sun for the rest of time.
Only done poorly, which sadly is most cars, even new. They are aimed too fucking high. Headlights are meant to be aimed down at the damn road. Not up high for far reach. That’s the point of highbeams.
I got projector leds for my car but i properly aimed them, the light has a sharp hard cutoff juuuuust below the windshield on Most sedans at distance to make sure I don’t blind em. If i need more and it’s safe I’ve got my highbeams which turn the road in even the darkest rural to noon.
I mean, it’s certainly better if they’re dipped properly, but each individual LED is still far too bright.
A scooter with a ring of single LEDs on it drove past me once - I guess they were some sort of cosmetic thing - and they were still dazzlingly bright in full daylight.
The car designers specifically dampen their headlight output in the exact spot where regulators measure their light.
But there’s also the issue that they have way too much blue light. Blue light still damages eyes even though it’s only UV adjacent and not UV.
Aiming the LEDs is only a partial solution, as soon as you got a slight incline you’re beaming straight into oncomers’ eyes
That is true but to be quite honest even the people that don’t have LEDs are blinding me when they are at an incline to me. In either situation I’m putting my hand up to try and block it out till they pass
There’s something about LEDs, cars with halogens don’t quite have that effect
My issue with LED lights is the flicker. It’s not astigmatism that’s affecting me, I don’t know what it is. But, I’m sure that other people don’t have this same sensitivity to flicker otherwise these flickering LED lights would never have been legal.
Imagine how I feel now that where I live, the governor decided to buy hundreds of busses of the same color and a big LED sign with white letters and dark background 😦
