Does cataract always require surgery?

Recently, I received a call from my mother.

My eyes are cloudy and my eyelids are also very swollen, so I went to the ophthalmologist and was told I have cataracts and was advised to have surgery.

My mother is 82 years old, and I am wondering whether it is better to proceed with surgery quickly or if we can wait a little longer and observe.

Is there no other way besides surgery for cataracts?

Is it okay to have surgery in the summer?