[Hand-held pupillometer for evaluating pupillary light reflex in general practice and at the bedside]. / Handpupillometer zur Prüfung der Pupillenlichtreflexe in der Praxis und am Krankenbett.

Owing to the sophisticated equipment currently required for the investigation of pupillary behavior, pupillographic procedures are still the preserve of a few specialized laboratories. To allow pupillographic measurements under ophthalmological office conditions, we designed a portable pupillometer that can also be used for bedside examinations. Following a defined light stimulus, the prototype presented in this paper records a direct pupillary light reflex on the basis of infrared reflex photometry. The latency of the pupillary reflex and the pupillary constriction time are determined and shown on a digital display.

Identification of human oculomotor system for quantitative diagnostics of eye muscle diseases.

Various discrete parameter estimation methods are explained and applied to the eye muscle model of Collins. Their effectiveness and accuracy are studied. Comparing saccadic eye movements to the motions of a fixation target data for parameter estimation are provided. As a first application, saccades of a subject with a Duane-Syndrome are evaluated.