A method for providing markers for evaluating and/or practising the visual field recognizable by an eye, and/or eyes, and/or visual system of a person wherein said method comprises evaluating • the ability of the peripheral visual field to detect a saccade triggering stimulus STS at a specific location of the visual field of said eye or eyes of said person, • the ability of the eye or eyes of a person to accurately hit a target by executing a saccade triggered by a saccade triggering stimulus STS at a specific location of the visual field of said eye or eyes of said person; by a) having said eye or eyes, fixated on a preceding fixation object FO p, which FO p is identifiable by the person only when said eye or eyes is accurately fixated on said FO p, i.e. when said FO p is positioned at the fovea of said eye or eyes of said person, execute a saccade in response to provided said STS, b) providing a fixation object FO containing a small character, symbol or pattern, which FO is identifiable by the person only when said eye or eyes is accurately fixated on said FO, i.e. when said FO is positioned at the fovea of said eye or eyes of said person, at the same location where said STS was, c) having said person identify said FO, said identification referred to as an identification of said FO, d) having said person report said identification of said FO by pressing a correct button, e) recording correctness of reported identification of said FO and time points of • providing said STS and/or FO, and • reporting of identification of said FO, f) calculating time period between providing said STS or FO, and reporting of said identification of FO; wherein • an incorrect or missing reporting of identification, and/or • extended delay in a correct reporting of identification, compared to delay regarded normal for persons corresponding to said person, or compared to delays for other locations of the visual field of said eye or eyes of said person, or compared to delays of said person obtained at earlier time point in his or her life, are markers for an abnormal and/or deteriorated • ability of said eye or eyes of said person to detect said STS at said specific location of the visual field of said eye or eyes of said person, • ability of said eye or eyes of said person to accurately hit a target by executing a saccade triggered by said STS, • ability of said person to identify said FO, and/or • function of said visual system of said person. • the ability of the peripheral visual field to detect a saccade triggering stimulus STS at a specific location of the visual field of said eye or eyes of said person, • the ability of the eye or eyes of a person to accurately hit a target by executing a saccade triggered by a saccade triggering stimulus STS at a specific location of the visual field of said eye or eyes of said person; a) having said eye or eyes, fixated on a preceding fixation object FO p, which FO p is identifiable by the person only when said eye or eyes is accurately fixated on said FO p, i.e. when said FO p is positioned at the fovea of said eye or eyes of said person, execute a saccade in response to provided said STS, b) providing a fixation object FO containing a small character, symbol or pattern, which FO is identifiable by the person only when said eye or eyes is accurately fixated on said FO, i.e. when said FO is positioned at the fovea of said eye or eyes of said person, at the same location where said STS was, c) having said person identify said FO, said identification referred to as an identification of said FO, d) having said person report said identification of said FO by pressing a correct button, e) recording correctness of reported identification of said FO and time points of • providing said STS and/or FO, and • reporting of identification of said FO, • providing said STS and/or FO, and • reporting of identification of said FO, f) calculating time period between providing said STS or FO, and reporting of said identification of FO; wherein • an incorrect or missing reporting of identification, and/or • extended delay in a correct reporting of identification, compared to delay regarded normal for persons corresponding to said person, or compared to delays for other locations of the visual field of said eye or eyes of said person, or compared to delays of said person obtained at earlier time point in his or her life, are markers for an abnormal and/or deteriorated • ability of said eye or eyes of said person to detect said STS at said specific location of the visual field of said eye or eyes of said person, • ability of said eye or eyes of said person to accurately hit a target by executing a saccade triggered by said STS, • ability of said person to identify said FO, and/or • function of said visual system of said person. • an incorrect or missing reporting of identification, and/or • extended delay in a correct reporting of identification, compared to delay regarded normal for persons corresponding to said person, or compared to delays for other locations of the visual field of said eye or eyes of said person, or compared to delays of said person obtained at earlier time point in his or her life, • ability of said eye or eyes of said person to detect said STS at said specific location of the visual field of said eye or eyes of said person, • ability of said eye or eyes of said person to accurately hit a target by executing a saccade triggered by said STS, • ability of said person to identify said FO, and/or • function of said visual system of said person.