Helmut Wilhelm

Inter‐individual variability in the dynamics of natural accommodation in humans: relation to age and refractive errors.

Frank Schaeffel, Helmut Wilhelm, E. Zrenner · The Journal of Physiology · 1993 · 271 citations · Full text

Mathematical procedures in data recording and processing of pupillary fatigue waves

Holger Lüdtke, Barbara Wilhelm, Martin Adler et al. · Vision Research · 1998 · 203 citations

Pupillary Fatigue Waves, Fatigue Management, Ophthalmology +6

Laboratory, Clinical, and Kindergarten Test of a New Eccentric Infrared Photorefractor (PowerRefractor)

Michael Choi, Frank Schaeffel, Anne Seidemann et al. · Optometry and Vision Science · 2000 · 176 citations

Daytime variations in central nervous system activation measured by a pupillographic sleepiness test

Barbara Wilhelm, H. Giedke, Holger Lüdtke et al. · Journal of Sleep Research · 2001 · 168 citations

Pupillographic Assessment of Sleepiness in Sleep-deprived Healthy Subjects

Barbara Wilhelm, Helmut Wilhelm, Holger Lüdtke et al. · SLEEP · 1998 · 165 citations · Full text

Sleep, Sleep Disorder, Alertness +12