@tisme It is my own personal opinion, that many different medications, used over a long time, can help lead to optical issues. For me, I use a steroid called dexamethasone as part of my treatment regimen for the blood cancer multiple myeloma. Long term use can exacerbate or cause cataracts. Fortunately we were able to lower my dose, not eliminate it. My age-related cataracts, complicated with the medication side effects, were remedied by cataract surgery over two years ago.

As others have said, it is good to get base-line testing done, and be aware of changes in your vision! Sight is a most-precious gift.
Ginger