I don't know what you consider "natural" for me takin
g artificial tears even restasis for a problem is the natural thin
do. This is from a previous post.
a Schirmer test of zero in
dicates that you have severe dry eyes. I'm assumin
g from your postin
g that you have tried both preserved and
unpreserved artifical tears, gels or lubricatin
tments at bedtime, environmental modification, etc. Don't discount eye drops.