my mother is 65 years and having problem of glaucoma.first doctor prescribed lumigan 0.1, and continued for two years once a day at fix time.recently 4 month back all the test done an eye pressure was just elevated 18 right and 20 left. then doctor prescribed brinolar and alphagan-z along with lumigan.these are being used thrice a day. it is very difficult to maintain the timings so please advice should we change the doctor or is there any eyedrop which is combination of all and can be use conveniently.