Influence of macular pigment optical density spatial distribution on intraocular scatter
Purpose: This study evaluated the summed measures of macular pigment optical density (MPOD) spatial distribution and their effects on intraocular scatter using a commercially available device (C-Quant, Oculus, USA). Methods: A customized heterochromatic flicker photometer (cHFP) device was used to m...
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| Format: | Article |
| Language: | English |
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Elsevier
2017-01-01
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| Series: | Journal of Optometry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1888429615000801 |
| _version_ | 1819168875625840640 |
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| author | Christopher M. Putnam Pauline J. Bland Carl J. Bassi |
| author_facet | Christopher M. Putnam Pauline J. Bland Carl J. Bassi |
| author_sort | Christopher M. Putnam |
| collection | DOAJ |
| description | Purpose: This study evaluated the summed measures of macular pigment optical density (MPOD) spatial distribution and their effects on intraocular scatter using a commercially available device (C-Quant, Oculus, USA).
Methods: A customized heterochromatic flicker photometer (cHFP) device was used to measure MPOD spatial distribution across the central 16° using a 1° stimulus. MPOD was calculated as a discrete measure and summed measures across the central 1°, 3.3°, 10° and 16° diameters. Intraocular scatter was determined as a mean of 5 trials in which reliability and repeatability measures were met using the C-Quant. MPOD spatial distribution maps were constructed and the effects of both discrete and summed values on intraocular scatter were examined.
Results: Spatial mapping identified mean values for discrete MPOD [0.32 (s.d. = 0.08)], MPOD summed across central 1° [0.37 (s.d. = 0.11)], MPOD summed across central 3.3° [0.85 (s.d. = 0.20)], MPOD summed across central 10° [1.60 (s.d. = 0.35)] and MPOD summed across central 16° [1.78 (s.d. = 0.39)]. Mean intraocular scatter was 0.83 (s.d. = 0.16) log units. While there were consistent trends for an inverse relationship between MPOD and scatter, these relationships were not statistically significant. Correlations between the highest and lowest quartiles of MPOD within the central 1° were near significance.
Conclusions: While there was an overall trend of decreased intraocular forward scatter with increased MPOD consistent with selective short wavelength visible light attenuation, neither discrete nor summed values of MPOD significantly influence intraocular scatter as measured by the C-Quant device. |
| first_indexed | 2024-12-22T19:10:33Z |
| format | Article |
| id | doaj.art-f67cc46073cb4b238a53534929188f21 |
| institution | Directory Open Access Journal |
| issn | 1888-4296 |
| language | English |
| last_indexed | 2024-12-22T19:10:33Z |
| publishDate | 2017-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Optometry |
| spelling | doaj.art-f67cc46073cb4b238a53534929188f212022-12-21T18:15:41ZengElsevierJournal of Optometry1888-42962017-01-01101636810.1016/j.optom.2015.10.001Influence of macular pigment optical density spatial distribution on intraocular scatterChristopher M. PutnamPauline J. BlandCarl J. BassiPurpose: This study evaluated the summed measures of macular pigment optical density (MPOD) spatial distribution and their effects on intraocular scatter using a commercially available device (C-Quant, Oculus, USA). Methods: A customized heterochromatic flicker photometer (cHFP) device was used to measure MPOD spatial distribution across the central 16° using a 1° stimulus. MPOD was calculated as a discrete measure and summed measures across the central 1°, 3.3°, 10° and 16° diameters. Intraocular scatter was determined as a mean of 5 trials in which reliability and repeatability measures were met using the C-Quant. MPOD spatial distribution maps were constructed and the effects of both discrete and summed values on intraocular scatter were examined. Results: Spatial mapping identified mean values for discrete MPOD [0.32 (s.d. = 0.08)], MPOD summed across central 1° [0.37 (s.d. = 0.11)], MPOD summed across central 3.3° [0.85 (s.d. = 0.20)], MPOD summed across central 10° [1.60 (s.d. = 0.35)] and MPOD summed across central 16° [1.78 (s.d. = 0.39)]. Mean intraocular scatter was 0.83 (s.d. = 0.16) log units. While there were consistent trends for an inverse relationship between MPOD and scatter, these relationships were not statistically significant. Correlations between the highest and lowest quartiles of MPOD within the central 1° were near significance. Conclusions: While there was an overall trend of decreased intraocular forward scatter with increased MPOD consistent with selective short wavelength visible light attenuation, neither discrete nor summed values of MPOD significantly influence intraocular scatter as measured by the C-Quant device.http://www.sciencedirect.com/science/article/pii/S1888429615000801Macular pigment optical densitySpatial distributionIntraocular scatter |
| spellingShingle | Christopher M. Putnam Pauline J. Bland Carl J. Bassi Influence of macular pigment optical density spatial distribution on intraocular scatter Journal of Optometry Macular pigment optical density Spatial distribution Intraocular scatter |
| title | Influence of macular pigment optical density spatial distribution on intraocular scatter |
| title_full | Influence of macular pigment optical density spatial distribution on intraocular scatter |
| title_fullStr | Influence of macular pigment optical density spatial distribution on intraocular scatter |
| title_full_unstemmed | Influence of macular pigment optical density spatial distribution on intraocular scatter |
| title_short | Influence of macular pigment optical density spatial distribution on intraocular scatter |
| title_sort | influence of macular pigment optical density spatial distribution on intraocular scatter |
| topic | Macular pigment optical density Spatial distribution Intraocular scatter |
| url | http://www.sciencedirect.com/science/article/pii/S1888429615000801 |
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