In people who do not get dry eye relief despite maximal lubrication, punctal plugs are often used.
Rather than applying an artificial tear, punctual occlusion helps to preserve any remaining natural tear fluid, which has by far the best wetting and nutrient capacity for the ocular surface. http://Dntntranchinh.com/index.php/vi/index.php?language=vi&nv=statistics&nvvithemever=t&nv_redirect=aHR0cHM6Ly93d3cuT3B0aWNhbGpvdXJuYWwuY29tL3Byb3MtYW5kLWNvbnMtb2YtcHVuY3RhbC1wbHVncy1mb3ItZHJ5LWV5ZS1yZWxpZWYv