One number does not tell the whole story
Many patients hear their eye pressure is “high” and understandably worry that they have glaucoma. However, ocular hypertension and glaucoma are not identical. Ocular hypertension means the pressure inside the eye is above a typical range without demonstrated glaucomatous optic nerve damage. Glaucoma is a disease characterized by characteristic injury to the optic nerve, sometimes with related visual field changes.
Why pressure matters
Eye pressure, also called intraocular pressure or IOP, reflects the balance between fluid production and outflow. Higher pressure increases the likelihood of developing or worsening many types of glaucoma. Lowering pressure is the main proven approach to slowing glaucoma progression, but treatment decisions take other factors into account, including optic nerve appearance, corneal thickness, age, and overall risk.
Can you have glaucoma with normal pressure?
Yes. Normal-tension glaucoma occurs when optic nerve injury develops despite pressure measurements in the statistically normal range. Conversely, some people have ocular hypertension for years without glaucomatous damage. This is why an eye pressure check at a screening event cannot by itself rule glaucoma in or out.
How your ophthalmologist evaluates the risk
A full assessment may involve repeated pressure measurements at different visits, a dilated optic nerve examination, OCT scans, standard automated visual field testing, gonioscopy to inspect the drainage angle, and pachymetry to measure corneal thickness. Thick or thin corneas can influence pressure readings and also contribute to risk assessment. Prior records are particularly valuable for determining whether there is change over time.
Does everyone with high pressure need treatment?
Not necessarily. Some people can be monitored without immediate medication, while others benefit from pressure-lowering treatment based on the estimated risk of future damage. If glaucoma is already present, the goal is often a personalized target pressure that may be adjusted when tests reveal progression. There is no universal pressure number that is safe for every eye.
Questions worth asking
Ask whether you have ocular hypertension, glaucoma, or an uncertain diagnosis; what evidence supports the assessment; whether baseline OCT and visual fields are recommended; and how often you should return. If treatment is advised, ask what outcome is expected, what side effects to watch for, and what alternatives are available. Clear understanding makes follow-up easier.
Next step: Have questions about your eye health or whether you need a comprehensive examination? Contact Bohonos Eye Care at office@bohonoseyecare.com or 210-729-0544 for general scheduling information. Do not use email for emergencies.