I never let myself run out of Simalasn for Dry Eyes, it's homeopathic. I've been using it for years, don't deal with PN but eyes dry out with age. I know grape seed extract is great for eye health in general and I'm on it 2 decades soon. It addresses so much including eyes. Lutein/billberry are good for eyes also and I take this too. I wear sun glasses even when cloudy outside.