I found pleasure in cloud gazing...until I read that staring at the sky can damage your eyes even if you're not directly staring at the sun!
I just find pleasure in zombie movies - that won't cause cataracted eyes. Well, unless I turn into one...
You can wear sunglasses if you're concerned.
I stared at the sun directly for 5 minutes once and can still see fine (Obviously, I wouldn't recommend it, I was a bit off my rocker at the time). heh

For a few days afterwards, everything orange looked purple, lol. It was kind of neat. The joys of being in one's twenties...
I'm sure, by way of experience, it's fine looking at clouds.

In the twilight years, as the eyes have aged, we'll all lose a bit of clarity in our color vision. But, if you want to really protect your peepers and keep them in tip top shape, just wear good sun glasses while outside.
I find sunglasses a bit annoying to wear; and I've never really expected to live into the older years. So, no biggy to me.