Premium
Effect of the interposition of optical filters with different visible light transmittances in mesopic and scotopic condition pupil size
Author(s) -
SANCHEZ RAMOS C,
VINAS PENA M,
DIAZ SERRANO Y,
TORETS C
Publication year - 2008
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.2008.452.x
Subject(s) - mesopic vision , scotopic vision , transmittance , optics , pupil , materials science , mathematics , physics , photopic vision , retina
Purpose To determine how can the pupil size, in mesopic and scotopic condition, be affected by the interposition of optical filters. Also, the variability of the effect of these optical filters due to each filter’s different visible light transmittance. Methods The transversal study included data from 56 eyes of 28 subjects. To measure the different pupil size, in high mesopic, low mesopic and scotopic condition, was used a digital binocular infrared pupillometer. The obtained pupil size’s measurements, without filter, were compared with the results after the insertion of the different optical filters used: 16 filters with different transmittances (from 82% to 5%). Results Some filters, 5 of the 16, with different transmittances, 63%, 17%, 8%, 6% and 5%, caused significant variations in the pupil size in mean mesopic condition. The 2 highest transmittance’s filters, 63% and 17%, between these 5 filters, which produced significant results (p<0.00, high mesopic condition, 4.0lux), were the ones that led a higgest pupil size variation, in the 3 different light conditions. Conclusion The influence of some optical filters in pupil size variation, was confirmed. This effect on pupil size was significant only in high mesopic condition, and it was independent of each filter’s different visible light transmittance.