[souffle]

It's not uncommon for older hamsters to get this sort of 'sleep' in their eyes. I wouldn't worry too much. They often clean it off on their own but if not then make a solution of 1pt cooled boiled water and a teaspoon of salt and bathe the eye using a cotton ball and try and ease it open. It's not easy but if you gently swaddle her in a teatowel it should help keep her still to do it. If it looks red or there is a reddish discharge then a vet visit will be needed next week when they are open and she may get some drops or gel to apply.