Thanks Peter,thats what I was hoping to hear but suspect that it may not be strictly legal without rta eye test. Unfortunatley Ross I think you may be right, will check with casa but I had my right eye done 3 yrs ago but was towing gliders at the time and don't recall missing a beat. Like you I used a polaroid snap on with the right lens missing at that time but my left eye at that time was my best "distance" eye. Seems more of an issue this time although I have been driving with sunnies only and feel more comfortable than I have for a long time. Actually hoping I won't have to wear glasses. Regards Ian.