Normal Tension Glaucoma (NTG) is it a Type of Glaucoma or an Entity of a Compressive Optic Neuropathy

NTG is known to be a special type of glaucoma which is still a matter of dispute in its etiologic, diagnostic, therapeutic aspects and its terminology(1).A lot of studies have been carried out, that indicated difference of POAG vs NTG such as:1. Optic nerve head localized affection in NTG vs POAG. (2) 2.overally VF defect is less affected in NTG and both central and paracentral defect were seen vs PAOG.(2,3)3. Genetic differences.(4)4. Optic nerve head blood flow.(5) 5. The NTG patients were more younger.(1)In this study we propose that labeling these patients as NTG could be a misinterpretation and NTG could be really an entity of a CON.