Unlike other hospitals, this is a single back opening, but it seems to be to prevent the disappearance of eye smiles I also have a lot of eye smiles , so I was afraid to open my eyes, so I did it here . I know the difference., the eyes are a little cooler. The back looks open, but the effect of lowering the corners of the eyes is not. So, those who want to lower the corners of the eyes would be better off looking for a side with a lower back opening.