Likely to be fine
There can be multiple conditions in an eye
at one time, and when this is the case a visual field
may be a bit off from it's full potential.
But it can still give useful information. In your case, if it is inaccurate, some changes can be made to the settings of the test to make it easier. If still inaccurate, there are still other parameters/tests of your eye that can be utilized to follow it.