IS HYDRATION IMPORTANT IN DRY EYE?

This study  concludes:

These are the first published data to show that individuals classified as having dry eye have  sub-optimal hydration, compared with non-dry eye patients.  These findings indicate that whole body hydration is an important consideration in dry eye.

FACTORS AFFECTING VISUAL FIELD RESULTS

This study reported in Invest Ophthalmol Vis Sci. concludes that mean deviation is less when there is a less experienced technician performing the test, when the test is performed after lunch, and when it is performed in the summer or autumn.

TACROLIMUS EYE DROPS FOR DRY EYE

This study reported in the eye journal Cornea concludes:

Topical 0.03% tacrolimus eye drops successfully improved tear stability and ocular surface status in patients with dry eyes.

Tacrolimus is a drop used in dogs.  There appears to be some concern that it may possibly increase the risk of developing cancer.