Is there a way to figure out which contact lens is stronger?

I just started a new pair of 2 week contacts today. When I take contacts out, I take 1 out, pour in solution, take the other out, solution and then cap both. However today when I was taking out my 2nd contact, it slipped off of my finger and fell right into the contact case (where my first contact was already place and submerged in solution). Now I cant figure out which contact is which. My prescriptions aren't that far apart (-2.25 and -1.50), so when I place them both on, I cant really notice a difference in vision. Is there any other way of figuring out which contact belongs to which eye?