I am 59 year old. Weight 56 kg, bp-normal no diabetic. But we feel following symptoms since last 3-4 months: 1. Motion is zig-zag, like a drunker. 2. Even at normal speed, longitudinal, body vibrations develop. 3. Some body vibration (y-dir.) appears standing with two wheelers 4. Slight tendency to fall. 5. Loss of balance. 6. Loose control to capturing something. 7. Dual images are formed without glasses it is overcome by using prism lenses since last 01 year.