The cat's eye

My older cat Tiger is going to turn 17 years old this year so I think he's a very old cat. He has become half-blind because there's a cataract in his left eye but he can still see clearly with his right one. I think that this old gentleman has very lovely long whiskers. Even he's quite a healthy old timer I have sometimes been thinking that he's a little bit demented but the oldness doesn't come alone, you know.