We didn't change for 8yrs

My son first lost one 1month after start.  Then lost 2nd time but searched and found.  This year he lost one as 3rd time.  So in most chance, I prepare for lost case.

In summer, the dirty lens can cause red-eye.  We have eye-drops ready for this case.  In worst case, I also have the doctor to deep clean lens to get it back to normal.

So we have the CRT lens for 8yrs w/o change.  I'm a cheap mom :-)