I don't think that is quite true. As the eye passes over the pressure
continues to drop rapidly until the center of the eye is overhead at which
point the pressure bottoms out and begins a rapid rise. The reason the eye
is calm is that as the spiralling winds converge towards the centre, there
comes a point at which the pressure gradient force cannot "pull" the winds
in any further so the air stops converging at a certain distance from the
centre of the storm. This air now has to go somewhere so it rises in
towering cumulonimbus and thus forms the eye wall. This is how I understand
it anyway.


You're right, but I was trying to simplify it for the original
questioner.

Tudor Hughes.