Hi I've had severe I mean severe dry eyes for som time. Nothing helped until I was introduced by my Corniya Specialist serum treatment. It's a life saver. It works like this I have 12 viles of blood drawn once a month. Over 5 hours the plasma is cleaned from the blood and they create 5 eye drop bottles from that. I than put 4 of those bottles in the freezer. One bottle is kept in the fridge as I put 1 drop in each eye every 2 hours 8 times a day. At night o put a gel before I go to sleep under each eye. The eye drops are enough for a month and a bit. Every 4 months I'm seen by the Corniya Specialist in the hospital clinic and the same treatment comtiues for the rest of my life. I'm only 45 yrs old and have been on this treatment for the last 2 years as of now. It works and you are being treated via your own body. Amazing ever and approved by the FDA .