The following reports and experiments show that the cornea has the capacity to dramatically change its shape over short periods of time. I have included some work on bird corneas, for what it's worth. For the birds studied, corneal change is a regular part of accommodation (focusing). Certainly, in the human eye, the change the cornea during accommodation, if it exists, is very slight. However, the effects may indeed be very significant over time. A better understanding of how the muscles of the human eye affect the cornea could bring us far towards finding cures and determining preventive measures for myopia and astigmatism.