Abstract
The paper describes a newly developed method, called IRIS, for the recording of dynamic pupillary reflexes simultaneously in both eyes. The method is based on the principle of reflection of infra-red light by the iris/pupil boundary. IRIS incorporates a head-fixed. Maxwellian viewing-light stimulator driven by a function generator. IRIS enables pupillary constriction and dilation to be recorded in response to a pulsed light stimulus, thereby permitting determination of the latency times of constriction and dilation. Furthermore, the recording of natural pupil oscillations, the hippus, is possible. IRIS incorporates a clamp-box mode, permitting the study of stimulus-induced pupil oscillations and pupil cycle time. The compact and portable IRIS pupil system combines reliable and accurate recording with general versatility and ease of operation.
Original language | English |
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Pages (from-to) | 27-32 |
Number of pages | 6 |
Journal | Medical & Biological Engineering & Computing |
Volume | 26 |
Issue number | 1 |
DOIs | |
Publication status | Published - 1 Jan 1988 |
Keywords
- Eye movements
- Infra-red light
- Light reflex
- Pupil
- Recording
- Reflection