For people who have only mild astigmatism and you have at least 20/40 vision you usually do not need or require glasses.
For those with worse levels of astigmatism that more blurs your vision then you would be required to wear glasses or contact lenses when driving.
If it's really hard to see when your astigmatism then your eye doctor would likely prescribe and recommend eye glasses.
You could also opt for Lasik Eye surgery which can correct the astigmatism and then you would not be required to wear glasses or contact lenses.
Yes astigmatism can sometimes cause floaters in peoples eyes.
It's normal to get eye floaters if you do have astigmatism but if your vision really worsens more than just eye floaters then something could be going wrong and you should see an eye doctor.
The condition astigmatism usually gets worse gradually and takes at least a few years or so to see any worse results of the astigmatism.
However in rare cases the astigmatism could get worse suddenly and if that does happen you should see an eye doctor.
The good news though is that astigmatism is not an eye disease and won't cause any harm to your eyes health.
For some people with astigmatism the astigmatism can go away and come back later.
A kid I went to school with years ago had astigmatism and it went away for about 3 months and then after those 3 months the astigmatism came back.
So yes astigmatism in some people can go away and come back.
Although for the majority of people who have astigmatism the astigmatism stays with them and sometimes even gets worse overtime.
Eventually the person with astigmatism may need to wear glasses or contact lenses to see or may need eye surgery to correct their vision.
Some peoples astigmatism may actually get better overtime but it's rare that it happens that way.