What is causing my

QWHEN looking in the mirror I have noticed that my pupils appear to be darting around. What could be causing this? I am on medication for depression.

ADOCTORS classify the abnormal eye movements you describe into two groups. One is called nystagmus and the other is saccades. In nystagmus the pupil drifts off, then jerks back to the centre of the eye. It can affect one or both eyes.

In ocular saccades the movements are fast, preventing you from holding a steady gaze. It occurs naturally in episodes during sleep and I suspect this is what you have. The most common cause is medication, especially sedatives and sedating antidepressants, so it is possible your medication is to blame.

I suggest you see your doctor who can check the diagnosis and advise if you need further tests or to change your medication.

If your vision is unaffected and your antidepressants otherwise suit you there may be no need to stop taking them.

I’VE got a problem with my right leg. I’ve had nerve tests and MRI scans on my head, back, spine and leg but nobody knows what the problem is. It’s been going on for nearly six years and it’s difficult for me to walk unaided now. Do you have any advice?

AIT sounds as if you have been thoroughly investigated so it is hard for me to give further