[OE-2362] added custom validator to validate fields only if a certain side is present.
[OE-2362] added custom validator to validate fields only if a certain side is present.

FiviumAustralia/OpenEyes,FiviumAustralia/OpenEyes,FiviumAustralia/OpenEyes,FiviumAustralia/OpenEyes,FiviumAustralia/OpenEyes