[13of40]

I wear soft contacts and one of my eyes has astigmatism. I've never understood how a symmetrical lens can correct an asymmetrical eyeball. Another strange thing I've seen is that after having put these things in my eyes about 2000 times at this point, I think I can tell that they vary in thickness, sometimes even in the same pack, but it doesn't seem to affect their performance. It all seems a little magical, so I guess I should find some time and go down the youtube rabbit hole that probably exists.

[kvgr]

Its not symetrical, one part is heavier and turns in the eye. What optometrist told me.

[mywittyname]

For mild astigmatism, you can use regular lenses and get pretty good results.

[JoeyJoJoJr]

I have tried contact lenses, but it seems they keep rotating around slightly and don’t match the angle of my astigmatism exactly, causing my vision to become blurry. I don’t know if it was a bad fit, but my optometrist told me it is because astigmatism correcting lens come in 15 degree increments, and the angle of my astigmatism falls right in the middle of these increments. I have never heard of anyone else having this issue and would have thought that surely it would be more widespread. Has anyone else had this issue, and have they corrected it?

[cm11]

Hybrid lenses have worked for me. Hard contact in the center with a soft "skirt" around the edge. Ideally, it's the vision of the hard lens and the comfort of the soft.

One brand: https://synergeyes.com/consumer/duette/duette-cl/

Or just hard lenses. My first were hard and in retrospect, they were less comfortable, but I had nothing to compare them to so I was more than happy with them. That was quite some time ago, but it was my understanding that hard lenses worked better with astigmatism.

A new doctor said I was on the edge between soft and hard and suggested I trial soft. It felt like wearing nothing. I did sorta notice they would blur on and off at times, but I opted for them and wore them for several years. Then he suggested the hybrid one for one eye and that's what I've been with.

[jasonkester]

I tried those too, and had the same issue. I’d find myself manually rotating them every few minutes, like focusing a pair of binoculars.

Wherever it was that they wanted to settle (assuming they were ever planning to settle) left everything out of focus.

Eventually I got tired of poking myself in the eye all the time and gave them back.

[Lewton]

This is the reason why I wear glasses now, it's not really fun to have your vision go blurry at random while biking

[UniverseHacker]

Astigmatism correction requires toric contacts- you should have a small line you have to orient upwards to align it properly, which myopia only contacts don’t have.

[BlueGh0st]

Toric lenses align themselves, the mark is for visual inspection by the doc while in the eye.

[foldr]

Hmm, I have astigmatism and have never had to worry about the alignment of my contact lenses in order to get good correction. Perhaps they are somehow engineered so that they automatically settle in the correct orientation.

Edit: Answer here, by the looks of it: https://news.ycombinator.com/item?id=41237519

[13of40]

That's good to know - thanks! My astigmatism one is definitely special, because it takes an extra two or three weeks to get it from Costco, but I didn't know there was an orientation mark on it. I'll take a look.