The more I think about it, the less sense it makes. She obviously still has some residual vision, in that she's more likely to bump into things in the dark than in the light. I leave lights on in the house more now than I used to, as she has twice missed the bottom stair coming down in the dark and she now won't go out in the garden after dark without the outside light on. To take her eyes out gives her no chance with the little residual vision she still has and if there's a way we can prevent any discomfort from her eyes without removing them, that's the way we'll go. I keep thinking that probably hoomans don't have their eyes removed for similar problems, but maybe I'm wrong. My neighbours were horrified when I told them, and agree that she can still tell light from shade. Will be ringing the specialist vets tomorrow.