I want to know what symptoms of cataracts appear.

What exactly is cataract?

It seems that elderly people are visiting the hospital frequently for cataracts or glaucoma.

I only vaguely hear about it around me.

I want to know exactly what disease it is and what symptoms appear!

Sometimes I also rub my eyes or look at my phone a lot.

It's a bit severe at this time.

Is cataract a disease that can occur regardless of age, causing blurry vision or slightly foggy eyesight?