Computerized Perimetry – Visual Field Testing
The visual field begins to narrow suddenly. The person reads, recognizes faces, and works at the computer. However, part of the side area gradually disappears from the visual field.
Computerized perimetry at "K+31" helps assess the visual field and detect changes that a standard visual acuity test does not reveal.
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How does computer perimetry differ from a regular vision test?
A table with letters shows visual acuity. Testing the field of view answers another question:
- Does the eye see the whole space?
- Are there any “blind” areas?
- Is there any narrowing of the side view?
At K+31, eye perimetry is often included in an extended ophthalmological examination, where data is compared with pressure, OCT and fundus examination.
| Method | What does it evaluate? | When needed |
|---|---|---|
| Computer perimetry | overview of the center and periphery | suspicion of glaucoma, control |
| Visometry | visual acuity | basic technique |
| Ophthalmoscopy | fundus | retinal and nerve assessment |
The table helps you quickly understand the difference. The doctor chooses the final route after examination.
General information
When we recommend computerized perimetry
We prescribe the test. This is precisely when complaints, examination findings, or an established diagnosis require a functional vision assessment. Sometimes a person doesn't notice a problem, but the doctor sees signs of risk. In this situation, an examination helps prevent obvious deterioration.
Suspected Glaucoma and Monitoring with an Established Diagnosis
If glaucoma is suspected, a pressure check alone is not enough. The doctor evaluates the nerve head, assesses the thickness of the nerve fibers, the patient's complaints, and the results of additional tests.
Static perimetry helps determine whether there are characteristic visual loss patterns. If a diagnosis is established, repeat charts show whether the readings are stable and whether therapy is helping. This is how the doctor assesses treatment control.
Complaints of visual field narrowing, "blind spots," or worsening peripheral vision
It's worth making an appointment if it becomes more difficult to notice objects to the side. Or if a dark area, "drops," or a feeling of narrowing vision has appeared. These can be signs of visual impairment due to ocular, vascular, and neurological causes. A sudden loss of vision, "curtains," flashes, pain, or rapid deterioration of vision require immediate in-person assistance.
Monitoring after injuries, surgeries, and diseases of the optic nerve and retina
After an eye or head injury, the doctor may order a visual field test to check the pathways. The test is also used after surgery and for diseases affecting the optic nerve or retina. It is important to detect the change and determine whether it remains stable.
Frequently asked questions about computerized perimetry
Is computerized perimetry painful?
Is there any preparation needed for the test?
What does computerized perimetry reveal?
How often should I have the test?
How to sign up for an examination at K+31
This appointment is suitable for patients with complaints and those for whom a doctor has already recommended a follow-up. Don't wait if your lateral vision is deteriorating, blind spots have appeared, you've had an injury, there's a hereditary risk, or fundus changes have been previously detected.
Who should especially not delay an ophthalmological examination?
We recommend perimetry for patients with suspected glaucoma, with narrowed lateral vision, after eye or head injuries, with nerve diseases, retinal changes, and for post-treatment monitoring. This list does not necessarily indicate a diagnosis. It helps to check your functional vision in a timely manner.
Schedule and Consult a Specialist
At "K+31," you can consult with an ophthalmologist, undergo a painless examination using modern equipment, and receive clear interpretation of diagnostic results.
Schedule an appointment if your doctor has recommended perimetry, you have a complaint of visual impairment, or you need a glaucoma diagnosis. We will perform the test, explain the results, and advise you on your next course of action.
References
- Russian Ministry of Health — Clinical Guidelines Index — https://cr.minzdrav.gov.ru/
- Russian Medical Journal — Ophthalmology Section — https://www.rmj.ru/articles/oftalmologiya/
- Ophthalmology Bulletin (Mediasphera) — https://www.mediasphera.ru/journal/vestnik-oftalmologii
- EyePress — ophthalmology portal — https://eyepress.ru/
- NMITs of Eye Diseases named after Helmholtz — https://www.helmholtzeye.ru/
- Russian Professional Ophthalmological Society — https://www.ophthalmology.ru/
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What is computer perimetry and what does it show?
A visual field examination is necessary to understand how the eye perceives space in front of and to the sides. The doctor evaluates the center, periphery, and symmetry between the eyes. They also assess areas of decreased sensitivity. This method helps identify visual field narrowing and helps identify visual loss and signs of damage to the visual pathways.
How the method works
The patient looks at the center of the device. Then, they press a button when they see a light stimulus. Automated perimetry:
The result depends on attention, fatigue, and gaze fixation, so the doctor explains the instructions in advance.
What parameters do we evaluate?
The doctor examines the boundaries of vision and the periphery. They identify asymmetries and defects in the visual field. If the area doesn't perceive the stimulus, the term "scotoma" may appear in the report.
The optic nerve's function is assessed separately, as is the stability of the retina's reception of signals. Early diagnosis is important. This is when there may be no complaints yet, but the map already shows the risk zone.