S.Park, K. Lindahl, G Temnycky, J. Aquavella:  The Effect of Pregnancy on
Corneal Curvature. Contact Lens Assoc of Opthal Journal 1992;18(4):256-259.

Changes in corneal curvature were observed with a linear relationship between
the gestational period and the increase of the curvature.  Corneal curvature
increases up to the third trimester and decreases to first trimester values
post-partum.  If breastfeeding takes place the increase in corneal curvature
remains until after weaning when it returns to 1st tri. values.  Prolactin is
suspected to cause physiological changes such as corneal edema.  This may
partly explain such phenom. as contact lens intolerance reported during
preg., although other factors may be involved. The authors suggested a
reasonable approach of defering the prescription of optical corrections such
as contacts until after cessation of breastfeeding.

Hope this helps in the discussion of the mom with ' dry eyes'.  That occular
pressure is unpleasant.  I didn't experience it so much with preg. but for a
while during early menopause it was making me nuts.  I could barely read.
Barbara Wilson-Clay, BSE,IBCLC
Austin. Tx