I am 52 and have been asthmatic all my life. For much of that time I have taken inhaled steroids and occasionally Prednisalone courses.
About three years ago I went to the optician for a routine appointment and they told me I was developing cataracts. They told me I was young for this to be happening and said it was likely to be the steroids I have taken.
I expected them to take about 10 years to really develop but about six months ago my eyesight fell of a cliff. I couldn't put enough lights on at home and I found the headlights of oncoming cars dazzled me badly, I thought I might need stronger glasses but it turned out my cataracts were pretty bad, particularly in one eye.
The good news is that I am now going for surgery which is quick and easy. What I would say though is that if you are asthmatic, get your eyes checked regularly.