I have worn hearing aids for some years. Many of my friends didn't even notice them, although I have short hair.. They are the type that loop over my ear, with a part that goes inside.
I wouldn't say that my hearing has improved 100%. I still have some trouble if I am with a group of people, with a lot of background noise. However they have made a huge difference to my life. You need to persevere with them, though. They feel strange at first. If you have problems, go back to the audiologist to have them adjusted. Don't just throw them in a drawer. I felt very self-conscious when I first got them, but quickly adapted.
I know several people who are somewhat deaf, or whose sight is poor, but they are too vain or embarrassed to get help.