Just like us, as they age dogs can lose their sight and hearing. There isn't a lot we can do about that.
However, there are some options for arthritis symptoms.
1) The most important thing you can do to help her arthritis is to keep her a good lean weight. I have no idea if she is overweight, but remaining lean can absolutely help her get around better.
2) I recommend over-the-counter glucosamine chews for all my older pets. You can get these from pet stores, or online. I like Cosequin, Dasuquin, and Glyco-flex brands.
3) Moderate exercise can help with arthritis. Many time the joint is sore and painful when the pet first wakes up or after being still. But once they are up and moving, the joint seems to hurt a little less. Mild to moderate movement absolutely can help lubricate the joint and help the pet be more comfortable. Now I am NOT recommending marathon training. But starting with a walk for a house or two if that as all she can do is a great start. Then work up to going to the end of the block and then working up to around a block.
Does she have any other illnesses or health concerns?
After a good physical exam and possibly blood work your vet may be able to prescribe or recommend other treatments that can help her pain.
I definitely would try to get her in ASAP to have her urine checked.
What other questions or concerns do you have?