Basic concepts and clinical evaluation of the Peritest automatic and semi-automatic perimeter

The Peritest is a computer assisted perimeter which purposely offers the possibility of both automatic and semi-automatic examination modes. A fast multiple-stimulus screening is possible next to extensive automatic assessment. The instrument uses LED's for the 206 stimuli, of which 151 are located within 25°-eccentricity. The examina-tion strategy uses the system of threshold-related supra-threshold presentations. The assess-ment phase may use 0.2 or 0.6 log. unit steps. The progress of the examination can be followed on a LED-monitor.