If you don't tell CASA the won't know, however if you get it done and then come back for your next medical and don't need glasses then you are going to raise eyebrows with the medical examiner.
I would not follow the advice of PeterC above but rather seek advice of a qualified professional first, as if you are actively using your class 1 as a commercial pilot and generating an income from it, then you should take it somewhat more seriously. It's very easy to feed us a throw-away line about a class 1 medical when that poster is not actually working as a commercial pilot.
The only downside is that if takes 10 minutes in the morning before I can focus properly to read my phone.
This does not sound normal.