Why do some people with high eye pressure never develop glaucoma?

People with high eye pressure who do not develop glaucoma have what is clinically termed ocular hypertension. While increased intraocular pressure is a significant risk factor for glaucoma, it is not the sole determinant of the disease.1

The reason some individuals remain unaffected is that the susceptibility of the optic nerve and the retinal ganglion cells to damage varies widely from person to person. Because there is no single pressure level that is universally indicative of glaucoma, an individual's optic nerve may be resilient enough to withstand pressures that would cause atrophy and visual field loss in others.1

It is essential to recognize that glaucoma is defined by the presence of specific optic neuropathy and resulting vision loss, rather than by a specific pressure reading alone. Consequently, medical professionals prioritize early diagnosis through regular screening, as high pressure serves as a warning sign that necessitates monitoring to protect long-term ocular health.1