leopard tortoise not moving much

by KATE
(lancaster ca )

ok i have leopard tortoise and ever since its been cold she is lazy. she walks around the tank with her eyes closed and wont open them much and they look swollen with a more round look to 'them the lid'. i dont think shes sick shes just lazy is it mormal for them to not wanna open there eyes in the winter?? should i be worried? is there drope that can help????