High eye pressure (ocular hypertension) damages the optic nerve slowly over years, leading to gradual vision loss in open-angle glaucoma; however, in rare, severe cases like acute angle-closure glaucoma, pressure can rise rapidly, causing damage within hours, requiring immediate emergency treatment. The timeline depends on the pressure level, with higher pressures causing damage faster (e.g., 30+ mmHg potentially causing blindness in ~3 years), while lower elevated pressures (21-25 mmHg) might take 15 years or more to cause severe vision loss if untreated, say Milwaukee Eye Surgeons and Reno Eye Care Professionals.
High ocular pressure, also known as ocular hypertension, doesn't always affect your vision or damage your eyes but can be a warning sign. Some people with ocular hypertension eventually develop glaucoma, an eye disease that damages the optic nerve due to abnormally high pressure in the eye.
While headache is the primary symptom of migraines, a sudden attack of angle-closure glaucoma can also cause migraine-like symptoms such as headache, eye pain, nausea, and vomiting.
Left untreated, it generally takes glaucoma an average of 10-15 years before causing severe vision loss or blindness.
As the disease worsens, the field of vision gradually narrows and blindness can result. However, if detected early through a comprehensive eye exam, glaucoma can usually be controlled and serious vision loss prevented.
In developed countries, the risk of a glaucoma patient reaching the level of vision loss defined as “legal blindness” is approximately five percent. Other eye conditions, such as macular degeneration, increase this risk and compound visual impairment.
If the pressure in your eye is over 21mmHg then you may be told you have raised pressure. If it less than 30mmHg you may not be advised to have treatment, as long as everything else is healthy with your eyes and your general health.
Raised eye pressure happens as the result of a buildup of fluid that flows throughout the inside of the eye. This fluid, called the aqueous humor, usually drains through a tissue located at the angle where the iris and cornea meet. This tissue is called the trabecular meshwork.
There are usually no early warning symptoms of glaucoma. Over time, you may slowly lose vision, usually starting with your side (peripheral) vision. Because it happens slowly, you may not notice your vision is changing at first. But as glaucoma progresses, you may experience blurry vision or vision loss.
Symptoms develop suddenly and include severe headaches that feel intense and throbbing, sharp eye pain that may radiate to the forehead and temples, nausea and vomiting, blurred vision, and seeing halos or rainbow-colored rings around lights.
Vitamin A is important for preserving normal vision and it is a well-known antioxidant that prevents the oxidative damage that contributes to the etiology and progression of glaucoma.
seeing rainbow-coloured circles around bright lights. blurred vision. feeling sick (nausea) and being sick. a headache.
Your healthcare provider can tell if the pressure inside your eye is high when they do their testing. In some cases, you may feel eye pain with movement of your eyes or touching your eyes. Even though some eye problems may create headaches or dizziness, this doesn't usually happen with ocular hypertension.
Higher than normal eye pressure can cause glaucoma. Glaucoma is a disease where eye pressure damages the optic nerve, causing vision loss. Ocular hypertension is not the same as glaucoma. With ocular hypertension, the optic nerve looks normal and there are no signs of vision loss.
Recognizing the Signs and Symptoms of Eye Damage
More severe symptoms may include sudden loss of vision, seeing flashes of light or floaters, and intense eye pain.
Normal eye pressure lies somewhere between 12 to 22 mmHg. Anything outside of that range indicates an eye condition.
Visual symptoms can include blurred vision, tunnel vision, or loss of one side of the visual field, depending on the location of the damage. Other symptoms can include eye pain (especially with movement), loss of color vision, flashing lights, and sometimes headache or nausea.
Fortunately, glaucoma typically progresses very slowly, over years. The progression of vision loss can be stunted, slowed, or even stopped with treatment. If the drainage angle in your eye gets blocked, the aqueous humor fluid level rises.
Symptoms of High Eye Pressure
If left untreated, it can lead to optic nerve damage and vision loss.
Can high blood pressure (or hypertension) cause glaucoma? The research is not conclusive. Doctors know that increased blood pressure results in increased eye pressure, possibly because high blood pressure increases the amount of fluid the eye produces and/or affects the eye's drainage system.
Although it has been suggested that glaucoma is a “sick eye in a sick body” the question of whether patients with glaucoma are at greater risk of death than their peers has not been definitively answered.12,13,14 Whereas Grodum et al12 found that there was no difference in life expectancy between patients with glaucoma ...
Anyone can get glaucoma, but African Americans over age 40, all people over age 60 and those with a family history of glaucoma or diabetes are at higher risk.
But treatment and regular checkups can help slow or prevent vision loss, especially if the disease is found in its early stages. Treatment of glaucoma aims to lower intraocular pressure. Treatment options include prescription eye drops, oral medicines, laser treatment, surgery or a combination of approaches.