title: Temporal summation and perimetry.
abstract: The threshold sensitivity at perimetry was determined experimentally as a function of the exposure time of the test objects. The summation capability of the retina is expressed as a 'memory' function with approximately exponential decay. The efficient stimulus is found from the convolution integral of the functions for memory and light stimulus. The effacing of relative defects by a prolonged exposure time is explained by means of a hypothetical model, based on the rarefaction of optic-nerve fibres.
authors.affiliation: Department of Experimental Ophthalmology, University Eye Clinic, Malmö, Sweden.
authors.forename: C E
authors.initials: CE
authors.lastname: Krakau
mesh_terms: D003936:Diagnosis, Computer-Assisted; D006801:Humans; D008960:Models, Psychological; D010775:Photic Stimulation; D012684:Sensory Thresholds; D013997:Time Factors; D058609:Visual Field Tests; D014794:Visual Fields