[Free static threshold perimetry with the Goldmann perimeter]

Areas of defects in the visual field can be investigated with the Goldmann perimeter in greater detail by means of free static threshold perimetry. The areas to be investigated are fixed according to the problem in question, either during or after standard perimetry, and are then checked at the threshold. As a basis the grid of supraliminal pattern perimetry on the Goldmann perimeter is taken, so that checks monitoring changes in defects can be made at the same test points. The combination of the neutral gray filter sets in the Goldmann perimeter allows threshold investigation at stimuli intervals of 1 dB. Examples of findings are used to show how free static threshold perimetry can be employed to check for defects, and particularly for the early stages of glaucoma.