My Son Was Diagnosed With Allergenic Conjunctivits When He Was

My son was diagnosed with allergenic conjunctivits when he was about three years of age. He has been unwell since the 11th December and is unable to attend school because of his symptoms - sore itchy eyes, infections, herpes etc. His left eye is giving him a lot of trouble of late. He is taking oral anti histamines, oral eye drops for eye allergies, zovirax tablets and zovirax ointment at the moment. He has also Barrets Oesophagus and he is taking a PPI for this twice a day (zoton). He has asthma and takes a preventer, if needed. I have bought aloe vera juice for him and intend to give it to him three times a day to see if his symptoms will improve. He was diagnosed with allergic rhinitis and will be taking an immunotheraphy tablet from February onwards (oral air) as he has a high intolerance to dust mite and all types of pollen. When he gets this oral air, it sets him back again and his eyes will flare up again. It is his last year to take it, so I don't know whether to go ahead with appointment in February or not, as it will set him back once more. My son is constantly lying around of late, with a pad in his hand holding his eye and he seems to be tired all the time. At the moment it is his left eye which is giving him grief all the time and is inflamed and sore. Any help will be appreciated as I feel helpless in dealing with my son's condition.