OCHO Medical Group of Professor Zagórski

Perimetry – examination of the visual field

Perimetry = examination of the visual field. It is a basic examination in the diagnosis of glaucoma, and in assessing the treatment efficacy. Perimetry is also performed in suspected diseases of the retina and optic nerve and tract, and in neurological condition (strokes, tumors). The examination is conducted with a special device called a perimeter. Each eye is tested separately. No special preparation of the patient is required. However, patient concentration and cooperation is needed, since he/she must signal the moment when light appears in the device. The analysis of one eye lasts about 10 minutes.


Visual field examination, also called perimetry, is an examination showing if there are no defects in the visual field. Perimetry is used e.g. in the diagnosis and monitoring of glaucoma. The patient is referred for this examination by an ophthalmologist or neurologist. If during the ophthalmological examination the patient reports that he/she cannot see a part of the picture from one side, he/she may be referred for computer perimetry. Subjects with suspected ophthalmological diseases or comorbidities are referred for the examination.

The duration of the examination depends on the patient cooperation with the person conducting the test, and on general well-being. It usually takes from 15 to 20 minutes (examination of one eye). The visual field examination is seemingly uncomplicated. However, the patient sometimes needs time to learn how to technically correctly perform the examination.

No special preparations are required to perform the visual field examination. One important thing is that the patient should come well-rested and calm for the examination, since it requires much attention and cooperation of the patient with the person conducting the visit. If the patient is using reading glasses, he/she should take them.

This examination is non-invasive and painless. The only nuisance felt by the patient can be caused by fatigue resulting from focusing attention for a longer period of time.

After the visual field examination, the patient should visit the ophthalmologist who had referred him/her for this examination. It is important, so as the doctor could combine all the examinations performed in a given person, in order to exclude or confirm his/her suspicions.

There are no contraindications for driving a car after the examination.

Yes, the procedure can be performed in a child who cooperates with the doctor.

There are no contraindications to perimetry in pregnant women.

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