Understanding eye pressure results
Informed by recognized medical guidance
Overview
Eye pressure, also called intraocular pressure (IOP), is the fluid pressure inside your eye. It is measured to check for conditions like glaucoma, which can damage the optic nerve.
Key facts
- It is measured in millimetres of mercury (mmHg).
- Normal pressure is typically between 10 and 21 mmHg, but this varies from person to person.
- High pressure does not always mean you have glaucoma.
Yes, measuring eye pressure is a routine part of many eye exams, especially for people over 40.
Anyone can have high eye pressure, but it is more common as you get older, especially over 40, and in people with a family history of glaucoma.
Symptoms
- Sudden, severe eye pain
- Sudden vision loss
- Seeing halos around lights
- Redness with pain and nausea
- ⚠Persistent eye discomfort
- ⚠Blurred vision that does not go away
Common symptoms
- Most people with raised eye pressure have no symptoms early on.
Symptoms in children
- Rare, but may include cloudy eyes, sensitivity to light, or eyes that appear larger than normal.
Symptoms in older adults
- Often no symptoms until vision loss occurs, so regular checks are important.
Causes
Main causes
- Too much fluid (aqueous humour) being produced inside the eye
- Poor drainage of fluid from the eye
Risk factors
- Age over 40
- Family history of glaucoma
- High blood pressure
- Diabetes
- Being very short-sighted or long-sighted
When to see a doctor
See a doctor urgently if:
- Sudden severe eye pain or vision loss (call emergency services immediately)
- New halos around lights
Book a routine appointment if:
- Yearly eye exam if you are over 40
- If you have a family history of glaucoma
- If you have symptoms like blurry vision
Diagnosis
Your eye doctor will measure eye pressure using a device that touches or puffs air at your eye. This is called tonometry.
Tests that may be done
- Tonometry (air puff or applanation)
- Optic nerve exam with a slit lamp
- Visual field test (checking side vision)
- Corneal thickness measurement (pachymetry)
What to expect at your appointment
The tests are painless and take about 15–30 minutes. Your eyes may be numbed with drops.
Treatment
Treatment aims to lower eye pressure to prevent optic nerve damage. It is usually lifelong.
Self-care at home
- Take prescribed eye drops exactly as directed
- Attend all follow-up appointments
- Wear eye protection if needed
Medical treatments
Eye drops are often the first step to reduce fluid production or improve drainage. If drops are not enough, laser treatment or surgery may be considered. Never stop or change medication without speaking to your doctor.
When is surgery considered?
Surgery may be needed if drops and laser are not controlling pressure. Options include creating a new drainage channel (trabeculectomy) or implanting a drainage device. Your surgeon will explain the risks and benefits.
Living with this condition
If you have high eye pressure or glaucoma, you will need regular check-ups and likely daily eye drops. Most people continue normal activities.
Lifestyle tips
- Avoid strenuous activities if advised by your doctor
- Wear eye protection during sports
- Sleep with your head slightly elevated if you have certain types of glaucoma
Diet and exercise
Eating a balanced diet rich in leafy greens and staying active can support overall eye health, but there is no specific diet proven to lower eye pressure. Moderate exercise may help.
Mental health and emotional wellbeing
Living with a chronic eye condition can cause anxiety about vision loss. It is important to talk to your doctor or a counsellor if you feel worried.
Prevention
High eye pressure itself cannot always be prevented, but regular eye exams can detect it early and prevent vision loss from glaucoma.
Screening programmes
Routine eye exams every 1–2 years after age 40 are recommended, especially if you have risk factors.
Complications
If left untreated
- Optic nerve damage (glaucoma)
- Gradual, irreversible vision loss
- Blindness if glaucoma is not treated
Long-term outlook
With early detection and treatment, most people with high eye pressure or glaucoma can maintain good vision for life. Regular care is essential.
Find support
External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.
Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Related conditions
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 16, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
Guidance may differ by country or region. Confirm local recommendations with a qualified healthcare provider.