Quantitative pupillometry: normative data in healthy pediatric volunteers.
OBJECTIVE
The authors describe the prospective use of a new hand-held point-and-shoot pupillometer (NeurOptics) to assess pupil function quantitatively.


METHODS
Repetitive measurements were made in 90 pediatric participants ranging in age from 1 to 18 years, providing a total of 100 measurements under ambient light conditions. The participants consisted of 45 patients without known intracranial or ophthalmological pathological conditions as well as 45 volunteers in the outpatient setting. Quantitative pupil measurements were reliably replicated in the study participants. The mean resting pupil aperture was 4.11 mm and the minimal diameter after stimulation was 2.65 mm, resulting in a 36% change in pupil size. The mean constriction velocity was 2.34 mm/second, with a mean dilation velocity of 2.2 mm/second.


CONCLUSIONS
Pupil symmetry was impressive in the entire cohort.
Boev
Angel N
AN
Department of Neurosurgery, The Medical Center of Central Georgia, Mercer University, School of Medicine, Macon, USA.
Fountas
Kostas N
KN
Karampelas
Ioannis
I
Boev
Christine
C
Machinis
Theofilos G
TG
Feltes
Carlos
C
Okosun
Ike
I
Dimopoulos
Vassilios
V
Troup
Christopher
C
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation / Q000592:standards; D004867:Equipment Design; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011446:Prospective Studies; D011680:Pupil / Q000502:physiology*; D011930:Reaction Time; D012016:Reference Values