Is my eyesight getting worse..?ㅜ

Hello. My eyes have always been healthy. I could see everything very clearly.

At some point, I was watching TV and I couldn't see things clearly from a distanceㅠ

I simply thought it was just worsening eyesight, but seeing everything blurry made me feel a little scared.

I heard that your eyesight has somewhat deteriorated when I visited the hospital.

But cataracts are said to be caused by clouding of the lens...

What other inconveniences, besides worsening eyesight, lead people to undergo cataract surgery?

I want to understand the reason for the surgery.