Glaucoma s guile.

She is never gives an ache syndrome, just in terminal stage, and fast vision lowering, thus patient understand,that he is sick, just on a hard stage, as to find her on the periodically visiting regular in oculist after checking pressure, and vision sharpness not suffers, he is till 100 percent.
As are base researches,which are finding a glaucoma at hospital are vision sharpness defining, field for vision checking, check for the bottom  eye, checking for intraocular pressure.