@raynbow- I have the same medical issue, and your friend's doctor is doing the right thing by monitoring her elevated eye pressure. Just because it is borderline high does not mean that she will develop glaucoma, and having any type of treatment at this point would probably do more harm than good.
On the other hand, your friend's condition could eventually lead to that diagnosis. By having her eye pressure monitored annually, her doctor will be able to notice changes, and provide treatment if and when necessary.
There are some things that your friend can do to make sure that she take good care of her eye health. She should always be sure to keep her annual appointment with her ophthalmologist so he or she can document any changes in her eye pressure. Also, if she ever develops any changes in her vision or any other troubling symptoms, she should have them checked out as soon as possible so she can get prompt treatment if her eye pressure ever rises to concerning levels.