Autologous serum has been used as an eye drop to treat severe chronic dry eye treatments for a long time. We will be discuss some of the pros, cons and precautions with using autologous serum drops as dry eye treatment. http://Nhagiaobuibachlien.net/music/index.php?language=vi&nv=news&nvvithemever=t&nv_redirect=aHR0cHM6Ly93d3cub3B0aWNhbGpvdXJuYWwuY29tL2F1dG9sb2dvdXMtc2VydW0tZHJvcHMtZm9yLWNocm9uaWMtZHJ5LWV5ZS10cmVhdG1lbnQv