question: Hi doctor, Four eye drops are used in combination to control eye pressure in case of glaucoma. They are Dorzolamide, Timolol, Brimonidine and Xalatan. In what sequence with how much gap should they be given to control eye pressure? Also for controlling afternoon pressure, either Dorzolamide or Brimonidine, which is better? Should I give Dorzolamide three times or Brimonidine three times?