I'm not sure about hamsters but I do know that in other animal species it sometimes can mean that they are blind, sometimes it is just the color.

If you are worried or if it looks as if there is any type of infection or trouble (swollen, discharge etc..) I would make an appt. w/ your vet.

Otherwise she will be fine, blind or not, they adjust very well, & obviously this was there before you got her, most likely she was born like that so even if she is blind she does not know life any other way. She would then think that being blind in one eye is normal.

Congrats on your new addition!