Many people believe that “normal” eye pressure means they’re safe from glaucoma—but that’s not always true. Normal-Tension Glaucoma (NTG) can damage the optic nerve even when intraocular pressure (IOP) appears normal. This often-overlooked form of glaucoma is linked to poor blood flow, vascular dysregulation, sleep apnea, and low systemic blood pressure. Because glaucoma is a multifactorial disease, early detection requires more than just pressure checks.