Your eyes are not deceiving you. There is a video online where it appears the moon deflates..
The footage was filmed by a Russian cosmonaut on the International Space Station. It seems to show the Earth’s satellite appearing to deflate when it disappears behind the horizon.
But before flat Earth or hollow Earth theorizers pick up on a new “inflatable” moon theory, there appears to be a reason for the appearance: What actually happens in the video is that the moon slowly disappears behind Earth’s horizon and the distortions are caused by the atmosphere of our planet.