Eye infection. The infection reappears.

For last 1.3 years I am getting infection in one eye either Right or left at a time every 15-20 days. After doctor prescibed various eye drops the infection is cured but after 15-20 days I again get infection in other eye. The doctors conducted various test, the test findings & doctors finding are mentioned in the attachment. But doctor adviced me to take Methotrexate 7.5 mg to improve my immunity power since they said that my body is not able to fight the infection. With Covid outbreak doctor adviced to start the medicine after the pandemic is over. Doctors said that this medicine could affect the liver. Presently if I put Diflumox eye drop in the infected eye then the redness vanishes after day or two. My question to you that can this Metrotrexate 7.5 mg medicine benefit me, is it safe to consume it, can it affect any body part, is there any permanent remedy to my eye problem due to which this infection will not happen, Can I use Diflumox eye drops in case the infection reappears.