Thanks for the compliments
There are a lot of nice people here giving good advices.
So this is what you wrote about your previous glasses.
- No glasses until 2019
- first visit to optometrist (march 2019): got -1 glasses for both eyes no cyl
- second visit (september 2020): no change in vision, same diopters
- third visit(april 2021): L -0.75 with 0.5 cyl and R: -1 with 0.5 cyl.
I’ll assume you got minus cyl.
You didn’t need cyl before. You didn’t need cyl even 6 months ago. You have never worn cyl earlier.
Don’t start introducing it as it would mean that you are correcting differently within each eye and that gives an extra adjustment task for the brain that the brain never had to do before.
It’s very easy to get used to it and it’s very difficult to unteach the brain later.
-0.75 and -0.5 cyl is the same as -1D. And -1 with -0.5 cyl is the same as -1.25D.
It is a simple opto conversion, not a reduction at all.
You should have the same clarity with a pair of glasses with -1D and -1.25D and no cyl.
The difference would be a tiny one that should go away within a month.
I had -0.5D cyl, too, in my prescription. I had -1.75D and -0.5cyl and it was my opto(!) who changed it to -2.00D. So taking the half of the cyl and adding it to the sph is not a reduction yet, just a simple conversion. It was helpful for me because this way I could wear non-toric contact lenses. (Toric contact lenses continously turn around on the eyes because there is a weight at the bottom to keep the cyl in place and that gets moved with every blink. So would have been a no-no for me.)
It simply means that your eye is not totally even, a part is OK with -0.75D but a part could do better with a slightly higher correction. Like a table that you balance out by sliding something under one leg.
You have various options based on your new prescription and your desire to keep maximum clarity:
- you can keep your old glasses, the one with -1D in both eyes without cyl and just complete the challenge of reversing the myopia degradation of the last 6 months. To get back to your own previous correction from Sep 2020.
- you can have a no sph drop just cyl conversion by getting a pair of glasses with -1D and -1.25D no cyl
- you can take a challenge by taking the new prescription without cyl, so -0.75D and -1D no cyl
As you can see, if my eyes had your prescription and it was my decision, I’d sooner accept stronger sph or uneven eyes than introduce cyl. You can do some astigmatism exercises to work away that -0.5D cyl if you really notice that. But it might be that what you notice is not exactly the slight cyl just the general laziness of the eye…
Also, I’d look around for habits or circumstances that might have contributed to developing a tiny bit of astigmatism between Sep 2020 and now.
Strongly contrasting lights from a certain direction? Monitor one sided? Leaning to one side while sitting on the chair? Leaning to one side on the sofa / in the bed while watching TV or movies?
If you insist on sharp vision:
In front of the screen: no glasses. Even with the full opto prescription as it is, you should be able to see everything on the monitor while sitting at a healthy distance from it.
At home: I would assume you could get around without corrections. Especially with the routine activities in the morning and in the evening. If you need more clarity during the day, wear your glasses for those activities. But take the glasses off whenever you can. With or without glasses, focus on text on bottles and boxes on the kitchen counter, on the bathroom shelf, on the bookshelf, etc. Find the edge of clarity with these things, and just take one step backwards and see if you can hold the clarity. Maybe you’ll find that you have to start from as close as 1m and you can only gradually build it up to 3m or 6m or more. You can do it with or without glasses, it’s just the distance until the edge of clarity will be different.
Outdoors: I’d say in the beginning wear your glasses for all distance vision time. Don’t forget to keep looking around at things at different distances. Move your eyes often to get back the normal range of motion. Establish a favourite route and take note of all the things on that walk / run.
Once you feel that the clarity is really good, that you see a lot more details compared to the first walk, you can experiment with 2 things: take the same well known walk completely without glasses and just take note of the differences in vision, or get a pair of glasses with 0.25D sph reduction and take the same known walk and see how much the difference is and if you look at something slightly blurry if you can bring it into focus by stopping, relaxing the shoulders, neck, eyes, taking a deep breath, making yourself aware of the peripheral vision and blinking.
From here on it will be up to you how you alternate the original glasses, the reduced glasses and the no correction during your walk / run. But you should gradually get to the point that you have good clarity with the reduced glasses, too.
Don’t worry about AF. I got to 20/20 uncorrected without knowing what AF was.
Best of luck on your journey.