Glaucoma is present in many older persons.  The treatment often includes taking two eye drops daily, one twice a day and one once a day.  This eyedrop holder provides a reminder for having taken the drops or not.  At the conclusion of a even numbered day, both bottles are placed in the holes marked “odd”.  When the first drops are done the next day, that bottle is placed in the center hole.  That night, when both drop are completed, both bottles are placed in the holes marked “even”.   So, if you are not sure if drops were taken, the bottle locations will provide the answer.