Perimetry Objective

Objective perimetry is a method of studying the visual field, in which not the signal of the subject, but the recorded constriction of the pupils or inhibition of the alpha rhythm of the electroencephalogram is used as an indicator of the appearance of visual perception.

In objective perimetry, the researcher presents the subject with light stimuli of varying brightness at different points in the visual field and records the reaction of the pupil or brain to these stimuli. Constriction of the pupil upon perception of a light stimulus is called a photomotor reaction, and a change in the alpha rhythm of the EEG during visual stimulation is called a visual evoked potential reaction.

Thus, objective perimetry allows one to obtain information about the state of the patient’s visual functions without relying on his subjective sensations. This method is especially useful for studying the visual field in children and people with cognitive impairment who are unable to adequately assess their visual capabilities. Objective perimetry complements the data of subjective research methods and helps to obtain a more complete picture of the state of the patient’s visual system.

Perimetric objectivity and application abroad

An objective method is called a research method in which the subject can see the time while being examined, and speaks about the parameters of vision to an expert witness as about his own indicators.

This is the implementation of the theory of the unconscious separation of physical and mental actions - typical of Western