RT Journal Article
T1 Relationship between halo size and forward light scatter
A1 Puell Marín, María Cinta
A1 Pérez Carrasco, María Jesús
A1 Palomo Álvarez, Catalina
A1 Antona Peñalba, Beatriz
A1 Barrio De Santos, Ana Rosa
AB Purpose -To determine the relationship between the size of a halo induced by a glare source and forward scatter or visual acuity (VA) in healthy eyes.Method -Measurements were made in the right eyes of 51 healthy individuals of mean age 29.3±7.5 years. Halo radius was measured using the Vision Monitor and low luminance (1 cd/m2) optotypes presented at a distance of 2.5 m. The visual angle subtended by the radius of the halo was calculated in minutes of arc (arc min). Forward scatter or, straylight, was measured using the compensation comparison technique. Best-corrected distance VA was measured using high contrast (HC) (96%) and low contrast (LC) (10%) Bailey-Lovie logMAR letter charts under photopic (85 cd/m2) and mesopic (0.15 cd/m2) luminance conditions.Results -Mean halo radius was 202±43 arc min (3.4±0.7°) and mean retinal straylight was 0.95±0.12 log units. Mean photopic distance HC-VA and LC-VA were−0.02±0.06 and 0.12±0.09 logMAR, respectively. Mean mesopic distance HC-VA and LC-VA were 0.35±0.11 and 0.74±0.11 logMAR, respectively. Forward stepwise regression analysis revealed that halo radius was significantly correlated with straylight (r=0.45) and mesopic LC-VA (r=0.48), but not with photopic HC-VAand/or LC-VA and mesopic HC-VA.Conclusions -In healthy eyes, the larger the halo size induced by a given glare source, the greater the forwardscatter (straylight) and worse the mesopic LC-VA. Halo size seems to be independent of photopic HC-VA or LC-VA and mesopic HC-VA.
PB BMJ Publishing Group
SN 0007-1161
YR 2014
FD 2014-10
LK https://hdl.handle.net/20.500.14352/34879
UL https://hdl.handle.net/20.500.14352/34879
LA eng
NO Puell Marín, M. C., Pérez Carrasco, M. J., Palomo Álvarez, C. et al. «Relationship between Halo Size and Forward Light Scatter». British Journal of Ophthalmology, vol. 98, n.o 10, octubre de 2014, pp. 1389-92. bjo.bmj.com, https://doi.org/10.1136/bjophthalmol-2014-304872.
NO Publicado online: 9 de mayo de 2014
NO Banco Santander-Universidad Complutense de Madrid
DS Docta Complutense
RD 27 jul 2024