I would be happy to suggest a product that may support eye health and overall well-being for your friend. I recommend Triphala, an Ayurvedic extract comprised of three Indian fruits. This adaptogen is often used to support digestion, but studies also show it may support eye health and nourish them as well. This can be added to warm water or tea, starting with 1/4-1/2 tsp. in the evening. Triphala in a Calendula tea (which also supports dry eyes) would be an extra effort in creating an "eye and vision health" tonic!
Feel free to add a dollop of raw honey or ghee to this tonic.