I have astigmatism, but the glasses which i wear are not with CYL, have any effect on the eyes? Some tell me yes , while others tell me not. Any reply will be appreciated. Thank you!

Absolutely do,but the level depends on your astigmatism degree,ususlly it is not so harmly if your degree under 25.Relatively, you should get a new one with CYL if your degree is beyond 50. I recommend you shoud change a new one ,In any case,it's good for your eyes.