RT Conference Proceedings
T1 Changes in contrast sensitivity perception due to protector screens for welding tasks : conventional protective optical filter vs novel protective optical filter of selective absorbance
T2 Cambios en la percepción de la sensibilidad al contraste debidos a las pantallas protectoras para tareas de soldadura : filtro óptico protector convencional frente a novedoso filtro óptico protector de absorbancia selectiva
A1 Bonnin Arias, Cristina Natalia
A1 Aguirre Vilacoro, V.
A1 Chamorro Gutiérrez, E.
A1 Lobato Rincón, Luis Lucio
A1 Langa Moraga, Antonio
A1 Navarro Valls, J.J.
A1 Sánchez Ramos, Celia
AB Purpose: To evaluate diff erences in contrast sensitivity perception in central visual field using protective optic fi lters for welding tasks. Two interposed filters are compared: a conventional protective optical fi lter and a new protective optical fi lter with selective absorption designed by University Complutense of Madrid (UCM).Methods: 36 people of working-age were included in a cross-sectional prospective observational study. Contrast sensitivity threshold in central visual fi eld was evaluated using FDT Perimeter, C-20 procedure (Humphrey systems, USA). ! ree conditions were set: a) without optical fi lters; b) with an interposition of conventional protective optical fi lter for welding (shade 2.5) and c) with an interposition of a novel protective optical fi lter of selective absorbance that fully blocks the short wavelength light and minimally attenuates the remaining bands of the visible spectrum.Results: Contrast sensitivity in all visual fi eld areas evaluated diminished 91-98% with the conventional protective optical fi lters. UCM optical fi lters provoked a low-level decrease in contrast sensitivity (9-19%). Mean contrast sensitivity thresholds were 29.5±5dB, 25.5±4dB, 1.8±2dB in conditions a, b and c respectivelyConclusion: Conventional optical fi lters resulted in drastically diminished contrast sensitivity. UCM optical fi lter minimally diminish the visual function, allowing a suitable visibility and also maintaining an appropriate level of protection against phototoxic damage.
YR 2012
FD 2012-10-13
LK https://hdl.handle.net/20.500.14352/106931
UL https://hdl.handle.net/20.500.14352/106931
LA eng
NO Resumen del poster
DS Docta Complutense
RD 26 jul 2024