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Pupilometer is the name used for two different devices -- one that measures the distance between pupils, and one that measures the pupil's response to visual stimuli.
Pupillary distance measurement Edit
In the most common sense, a Pupilometer is a tool for measuring pupillary distance (PD). It is used for fitting eyeglasses so that the lenses are centered in the visual axis. This is the most common nomenclature. It may also be used to verify a PD measurement taken from a millimeter ruler placed across the bridge of a patient's nose for distance and near focus.
Pupil Response Edit
In ophthalmology, a pupillary response to light is differentiated from a pupillary response to focus (ie. pupils may constrict on near focus, as with the Argyll Robertson pupil) in the diagnosis of tertiary syphilis. Although a pupillometer can be used, the diagnosis is often made with a penlight & near-point card.
The extent of dilation of the pupil in the eye could be an indicator of interest and attention. Methods of reliable measurement of cognitive load, such as the dilation or constriction of the pupils, are used in marketing research to assess the attractiveness of TV commercials. Dilation of the pupils reflects an increase in mental processes, whether it be attentiveness, or psychomotor responsiveness.
- ↑ Vision Screening Program News Articles. URL accessed on 2007-07-14.
- ↑ Hess, Eckhard H.; Polt, James M. (5 August 1960), "Pupil Size as Related to Interest Value of Visual Stimuli", Science 132 (3423): 349, doi:10.1126/science.132.3423.349
- ↑ Dr. John Andreassi, editor of International Journal of Psychphysiology, with guest editor Eric Granholm "Pupillometric Measures of Cognitive and Emotional Processes". URL accessed on 2007-07-16.
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