The varying size of the pupil is a physiological response to many external factors (the pupillary response). In a heightened sympathetic activity, these muscles can follow the same response pattern as in the case of various light conditions. The first muscle constricts the pupil when light is too bright, while the other expands it in poor light conditions. When the amount of light coming through the iris exceeds the normal requisition, or there is a shortage of light for the eye to achieve normal vision, the iris sphincter muscleand iris dilator muscle react, creating what is known as the pupillary light reflex. Light passes through the cornea, the pupil and the lens to finally fall on the light-sensitive cells of the retina. The presented approach is distinct from other similar studies because it decouples the pupillary light reflex. Other criteria such emotional arousal, cognitive processes or even memory operations can also alter the pupil, among which the decoupling of light is important. contractions and dilation, are caused by light. The main changes occurring in pupil size, i.e. It can be used to better estimate the influence of light on pupil size. Different approaches can be compared to show the difference between particular models.The methods presented in this paper enable a more detailed investigation of the influence of various parameters on the pupil. The presented plots are based on those equations. Various researchers estimate their equations based on oculographic data obtained in the course of experiments. These models allow to distinguish pupil dilation caused by the influence of light and other factors such as psychological state of participants.The developed methods were presented based on empirical data. The aim of this paper is to present methods to calculate pupil size based on various parameters, such as: luminance, age, corneal flux density or monocular/binocular effect.
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