H Tegetmeyer1. 1. Klinik und Poliklinik für Augenheilkunde, Universität Leipzig. tegeth@medizin.uni-leipzig.de
Abstract
BACKGROUND: The aim of this study was to characterise the changes of the dynamic pupillary light reflex in patients with unilateral Horner's syndrome by appropriate pupillographic parameters. METHODS: The dynamic changes of pupillary diameter in response to light flashes of 100 ms were recorded in darkness with two infrared video cameras in 15 patients. RESULTS: Significant changes in the pupillary light reflex of the affected side were observed only during the phase of redilatation. The decelerated redilatation was defined by the following parameters: (1) time parameters (percentage of redilatation after 4 s and after 5 s, time to reach 67% and 75% of redilatation) and (2) amplitude-adjusted velocity parameters (relative velocity at 67% and at 75% of redilatation). CONCLUSION: A slowed pupil redilatation in patients with Horner's syndrome can be detected also after short light flashes and is characterised by prolonged redilatation time parameters and reduced amplitude-adjusted redilatation velocity parameters.
BACKGROUND: The aim of this study was to characterise the changes of the dynamic pupillary light reflex in patients with unilateral Horner's syndrome by appropriate pupillographic parameters. METHODS: The dynamic changes of pupillary diameter in response to light flashes of 100 ms were recorded in darkness with two infrared video cameras in 15 patients. RESULTS: Significant changes in the pupillary light reflex of the affected side were observed only during the phase of redilatation. The decelerated redilatation was defined by the following parameters: (1) time parameters (percentage of redilatation after 4 s and after 5 s, time to reach 67% and 75% of redilatation) and (2) amplitude-adjusted velocity parameters (relative velocity at 67% and at 75% of redilatation). CONCLUSION: A slowed pupil redilatation in patients with Horner's syndrome can be detected also after short light flashes and is characterised by prolonged redilatation time parameters and reduced amplitude-adjusted redilatation velocity parameters.