Please tell me what does a medium suspect for glaucoma really mean?

It means: That your eye exam revealed some features that are consistent with the eye disease glaucoma, but there is not enough evidence to warrant a diagnosis. Glaucoma suspects are common and about 1 in 5 will develop glaucoma within three years.

You look like you: could have glaucoma in that either your optic nerve looks "cupped" or your visual field looks abnormal, or your eye pressures are elevated. However, though something looks off, something also shows that the nerve function is still strong. Without being confident that this is true glaucoma, one calls you a suspect who needs close observation to make sure it does/doesn't develop. If so, treatment.