I was not able to wear my contact lenses while breastfeeding any of my
children, because my eyes were too dry.  I assumed it was something to do
with the lower estrogen levels, which decrease lubrication levels in other
places as well ;)

It wasn't until several years post partum (still breastfeeding) that I could
comfortably wear my contacts.  The dry eyes were unnoticeable except when I
had the contacts in.

Katherine A. Dettwyler, Ph.D.
Texas A&M University