RT Conference Proceedings T1 Diffuse Illumination Device to Improve Mesopic Contrast Sensitivity in Drivers. T2 Dispositivo de iluminación difusa para mejorar la sensibilidad al contraste mesópico en conductores. A1 Navarro Valls, J.J. A1 Chamorro Gutiérrez, Eva A1 García Rojo, M. A1 Langa Moraga, Antonio A1 Bonnin Arias, Cristina Natalia A1 Sánchez Ramos, Celia AB Purpose: To evaluate the influence of a diffuse illumination device located outside the " eld of vision that provokes a controlled pupillar miosis, on the contrast sensitivity in drivers tested in mesopic conditions.Method: Cross-sectional prospective observational study in which contrast sensitivity by Pelli-Robson Test (CS) was evaluated in 49 drivers under 40 years old and 60 drivers over 40. The study was carried out in a simulated setting for night driving with and without the interposition of the diffuse illumination device. The mesopic contrast sensitivity was measured in the absence or presence of glare.Results: In both age groups, a statistically signi" cant improvement of contrast sensitivity was exhibited. In drivers aged over 40, baseline (BS) Pelli-Robson contrast sensitivity scores were: BS=0.83±0.3 and BSg=0.59±0.3 in absence and in presence of glare, whereas values for the interposition of diffuse illumination device (D) were: D=0.93±0.3 (p<0.05) and Dg=0.62±0.3 (p<0.05). On the other hand, in drivers aged under 40, baseline contrast sensitivity values were: BS=1.09±0.2 and BSg=0.95±0.3 whereas the interposition of the mentioned system showed the following values: D=1.27±0.3 (p<0.05) and Dg=1.11±0.3 (p<0.05).Conclusion: Using a diffuse illumination device in the interior of the vehicle provides significant improvement in contrast sensitivity. YR 2013 FD 2013-04-21 LK https://hdl.handle.net/20.500.14352/106918 UL https://hdl.handle.net/20.500.14352/106918 LA eng NO Incluye resumen e índice. DS Docta Complutense RD 6 abr 2025