You can drip some artificial tears to keep your eyes moist and lubricating, and use the prescription eye medications to heal the conjunctiva given rise to by the pinguecula. In your diets, you should eat more foods rich in vitamin C and vitamin E, such as sweet potatoes, garlic, pumpkin seeds, wheat germs, nuts, carrots, pumpkin, mangoes, apricots, ect., to help fight degeneration of cells in the eyes. As a pinguecula can be caused by frequent exposure to sunlight without taking any protective measures, so you had better wear sunglasses when you go outside to avoid exposing your eyes to the bright sunlight. Wish you recover soon.