Hey Donna,
If you took the Therapeutics program you've received that class...here's the info on dry eye syndrome.
Dry Eye Syndrome
Dry Eye Syndrome is associated with aging (post-menopausal women have the highest incidence of this condition), some autoimmune diseases (especially Sjogren’s Syndrome), dry air exposure, wearing contact lenses, vitamin D or B-12 deficiency, long-term viewing of computer screens, and some pharmaceutical medications (antihistamines, atropine, tranquilizers, opioids, scopolamine, THC, beta blockers, diuretics, etc.). Common symptoms include dry, gritty, irritated eyes, redness, pain or itching and light sensitivity,
Several herbs, herbal formulas or supplements have been shown to reduce dry eye, including Goji berry, Qi Ju Di Huang Wan/Lycium-Rehmannia tea pills (Lou, et al, 2020), Omega 3 fatty acids/fish oil (Griannaccare, et al, 2019), vitamin E (Riva, et al, 2017), Chrysanthemum flower, Mulberry fruit, Ligustrum fruit/Nu Zhen Zi, vitamin A (Alanazi, et al, 2019), vitamin D (Yang, et al, 2018), and vitamin B-12 (Ozen, et al, 2017). In addition, lubricating eye drops, adequate hydration, using humidifiers in dry homes, and avoiding excessive eye strain, cigarette smoke, dry air or dust can be useful.