My eyes have definitely deteriorated rapidly, often blurred vision. As I spend most of my time outside in Queensland Australia, I had my reading glasses tinted as ANY light hurts my eyes with the MSA. The funny thing is the glasses are fantastic but I'll have to get another ordinary pair as i6cant read a thing when I'm inside...didn't think of that at the time...but I still squint ALL the time, even the light on the phone is daunting, I have to have it dull....