I urge everyone to bookmark that blog; it is always a fascinating tour of the weirder and wonderfuller places on our planet. And let me leave you with this simply jaw-dropping video of undulatus asperatus in action.
(A sunscreen with a physical block like titanium dioxide or zinc oxide can be applied last, after a serum or moisturizer.) Apply a serum next and, finally, moisturizer if you need it. Polis also recommends serums or sunscreens with moisturizers built in because they save time.
When starting a new, preservative-free artificial tear, use the drops every 1-2 hours for at least two weeks before reducing frequency of use. When you taper their use, see if your symptoms worsen. It often is easier to determine feeling worse than better.