Consult a neurophysician. Get a CT scan/ MRI done to find out the cause of the excruciating pain. The eyesight need to be tested .it could be weak just because of the advancing age. Get a blood test done for serum
uric acid . The most common cause for joint pain at this age can be increased uric acid.
Next Steps
plan the treatment according to the report
Health Tips
you can also consult an orthopedic for joint pain