Are ‘glaucoma’ and ‘high intra-ocular pressure’ one and the same?

There is an understandable confusion between these two terms, and some erroneously consider them as synonyms.  The two are indeed interrelated, but not identical.  To highlight this, there are individuals with high eye pressure but without glaucoma, while others, yet, have glaucoma, but  without any high eye pressure.,  This indeed sounds confusing?, so let me try to explain the logic behind these paradoxical statements:

High eye pressure (in medical language “high intra-ocular pressure“) means that the pressure readings of the eye pressure are higher then (i.e. outside) the normal rang.  Normal eye pressures in humans range from 10 to 21.  Hence, any measurement of 22 and above is statistically defined as a deviation from the eye pressure norm, but does not necessarily imply the existence of glaucoma?

Glaucoma, as a disease is defined as irreversible damage to the optic nerve fibers, resulting in irreversible damage to the visual field.  Usually this injury is caused due to high pressure inside the eye.
In that case glaucoma patient will be defined as someone with damaged optic nerve and at the same time with visual field defects.

Glaucoma & Cataract:



This website was written by Prof. Eytan Blumenthal, to better understand glaucoma & cataract. This information should not replace medical consultation.

Related Posts

What is Glaucoma
Glaucoma is one of the leading causes of blindness in the developed world today. Many cases of blindness could be prevented if earlier diagnosis and treatment were initiated.  Glaucoma usually causes...
How Glaucoma Damages Our Vision
Glaucoma is a medical term referring to a group of eye diseases defined by elevated intraocular pressure which may result in irreversible damage to eye sight due to atrophy of the optic nerve. The process...
A visual field machine used for testing glaucoma patients
How is Glaucoma Diagnosed?
 Patients who visit my clinic for the first time often ask me:  “do I have glaucoma or perhaps not?”.  Others  who have already been diagnosed with glaucoma with certainty,...
A normal GDx scan
Who is at Risk of Developing Glaucoma
High Intraocular pressure – there is no doubt that high intraocular pressure is the greatest risk factor causing glaucoma and damage to the ocular nerve, yet, only less than half of the...