Eyes still for few seconds. The reports!

My sister is having left hand shivering for last 1 month and we had gone to MBBS he was saying it is urine infection ..We got tests done urine culture ,routine ,CBC , ultrasound abdomen ..Reports came normal ..Then again we went for neurologist ..He asked for MRI ,EEG and kf ring test to be done ..We have done EEG and MRI yesterday morning ..Both reports are ok .. But for last few days eyes are getting still for few seconds then again becomes normal ..Dr has prescribed tryptomer , melzap MD 0.25 and rejunex od After taking melzap she feels ok Dr Sahab please tell what may be cause ofe getting eyes still as reports are normal according to my Neurologist.. Neurologist is saying it is due to anxiety most probably but I'll do the kf ring test tomorrow..I've attached the reports