Brightness reduction as a function of the angular position of a glare source
The effect of intraocular scattering of light generated at a peripheral glare source is quantified using a model empirically formulated in terms of the veiling luminance. This luminance is directly proportional to the illuminance generated at the eye by this source and inversely proportional to the...
Guardado en:
| Publicado: |
2009
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00303917_v42_n1_p33_Issolio http://hdl.handle.net/20.500.12110/paper_00303917_v42_n1_p33_Issolio |
| Aporte de: |
| id |
paper:paper_00303917_v42_n1_p33_Issolio |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_00303917_v42_n1_p33_Issolio2023-06-08T14:55:48Z Brightness reduction as a function of the angular position of a glare source Brightness matching Glare Veiling luminance The effect of intraocular scattering of light generated at a peripheral glare source is quantified using a model empirically formulated in terms of the veiling luminance. This luminance is directly proportional to the illuminance generated at the eye by this source and inversely proportional to the square of the eccentricity angle subtended by the source with the visual axis. In previous articles the effect of brightness reduction due to the presence of a glare source subtending 10° is analyzed and it results that this effect increases when the illuminance generated by the source increases. In the present paper the dependence of brightness reduction on the eccentricity angle of a transient glare source generating 60lux at the eye is investigated. A method of magnitudes comparison, consisting in comparing the perceived brightness of a stimulus of variable luminance presented without glare to that of a reference stimulus presented simultaneously with glare, is employed. For 5 emmetropic young adults it results that, when the angle decreases from 15° to 7.5°, the matching luminance decreases as predicted by the veiling luminance model. This would indicate that the brightness reduction phenomenon is strongly dependent on the veil produced by the glare source. The results obtained are compared to those of other authors found under stable glare conditions. © Sociedad Española de Óptica. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00303917_v42_n1_p33_Issolio http://hdl.handle.net/20.500.12110/paper_00303917_v42_n1_p33_Issolio |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Brightness matching Glare Veiling luminance |
| spellingShingle |
Brightness matching Glare Veiling luminance Brightness reduction as a function of the angular position of a glare source |
| topic_facet |
Brightness matching Glare Veiling luminance |
| description |
The effect of intraocular scattering of light generated at a peripheral glare source is quantified using a model empirically formulated in terms of the veiling luminance. This luminance is directly proportional to the illuminance generated at the eye by this source and inversely proportional to the square of the eccentricity angle subtended by the source with the visual axis. In previous articles the effect of brightness reduction due to the presence of a glare source subtending 10° is analyzed and it results that this effect increases when the illuminance generated by the source increases. In the present paper the dependence of brightness reduction on the eccentricity angle of a transient glare source generating 60lux at the eye is investigated. A method of magnitudes comparison, consisting in comparing the perceived brightness of a stimulus of variable luminance presented without glare to that of a reference stimulus presented simultaneously with glare, is employed. For 5 emmetropic young adults it results that, when the angle decreases from 15° to 7.5°, the matching luminance decreases as predicted by the veiling luminance model. This would indicate that the brightness reduction phenomenon is strongly dependent on the veil produced by the glare source. The results obtained are compared to those of other authors found under stable glare conditions. © Sociedad Española de Óptica. |
| title |
Brightness reduction as a function of the angular position of a glare source |
| title_short |
Brightness reduction as a function of the angular position of a glare source |
| title_full |
Brightness reduction as a function of the angular position of a glare source |
| title_fullStr |
Brightness reduction as a function of the angular position of a glare source |
| title_full_unstemmed |
Brightness reduction as a function of the angular position of a glare source |
| title_sort |
brightness reduction as a function of the angular position of a glare source |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00303917_v42_n1_p33_Issolio http://hdl.handle.net/20.500.12110/paper_00303917_v42_n1_p33_Issolio |
| _version_ |
1768546057315155968 |