geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The effect of age-related lens yellowing on Farnsworth-Munsell 100 hue error score


, : The effect of age-related lens yellowing on Farnsworth-Munsell 100 hue error score. Ophthalmic & Physiological Optics 28(5): 448-456

To investigate the effects of real and simulated age-related changes in crystalline lens yellowing on Farnsworth-Munsell (FM) 100 hue performance. FM 100 hue total and partial error scores (PES) were measured in a group of younger (n=10, mean age=22.2+/-2.65 years) and a group of older (n=10, mean age=54.5+/-2.64 years) normal observers along with psychophysical estimates of crystalline lens optical density and pupil size. Three younger observers underwent repeated FM 100 hue testing under a variety of simulated age-related lens yellowing conditions, using filters with well-defined transmittance properties which attempted to mimic the real age-related lens yellowing changes of the older group. FM 100 hue total and PES were significantly higher in the older age group compared with the younger group (p<0.01). Lens density measures were significantly higher in the older age group compared with the young group (p<0.01), but showed less scatter than individual FM 100 hue error scores. Simulated lens yellowing in the three younger observers, equivalent to the level of that of the older observers, did not affect any of their FM 100 hue total or PES. Simulation of age-related lens yellowing in younger observers has little effect on FM 100 hue error score. A variety of other factors such as pupil size, background illumination level, iris colour and macular pigment density may contribute to the age-related increase in FM 100 hue scores.

US$19.90

PMID: 18761482

DOI: 10.1111/j.1475-1313.2008.00593.x


Other references

Laffon, E.; de Clermont, H.; Bordenave, L., 2011: PET-CT in thoracic disease. PET-CT imaging merges metabolic data obtained after injection of a tracer labelled with a positron emitter, with CT anatomical data. This whole-body technique provides (i) an improved spatial resolution and (ii) when the tracer is ¹⁸FDG, quanti...

Wang, P.; Ouyang, H.; Li, Q.; Hao, L.; Huang, Y.; Zeng, W., 2015: Antinociceptive effect of intrathecal amiloride on neuropathic pain in rats. The aim of this study was to investigate the antinociception of intrathecal amiloride and examine its effect on the neuropathic pain-induced activation of c-Fos and p-p38 MAPK in the rat spinal dorsal horn (SDH). Sprague-Dawley rats were chronical...

Rica, Rúl.A.; Brogioli, D.; Ziano, R.; Salerno, D.; Mantegazza, F., 2012: Ions Transport and Adsorption Mechanisms in Porous Electrodes During Capacitive-Mixing Double Layer Expansion (CDLE). A model of the electro-diffusion of ions in porous electrodes is applied to analyze the dynamics of capacitive-mixing extraction of energy from salinity gradients with carbon porous electrodes. The complex time-evolution of the cell voltage observ...

Khaled, E.; Hassan, H.N.A.; Mohamed, G.G.; Ragab, F.A.; Seleim, A.Eldin.A., 2011: Disposable potentiometric sensors for monitoring cholinesterase activity. A highly sensitive disposable screen-printed butyrylcholine (BuCh) potentiometric sensor, based on heptakis (2,3,6-tri-o-methyl)-β-cyclodextrin (β-CD) as ionophore, was developed for butyrylcholinesterase (BuChE) activity monitoring. The propose...

Allan, H.H., 1929: A list of supposed wild hybrids among the naturalized plants of New Zealand. An annotated list of 24 inter-varietal, intra-specific and 37 interspecific hybrids.

Zhu W Q.; W.T.Z., 1985: Acute cauda equina dysfunction following lumbar disc operation. This article reports 7 cases of acute cauda equina dysfunction following lumbar disc operations. The main factors causing the conditions were neglected central disc protrusion during surgery, cauda equina herniation through an opening of the dura,...

Veley, R.; Mancl, K., 1993: Water systems for small communities--a workshop for local officials. Paper er 1993 (93-2531 93-2550)

Quinlan, J.A., 1984: Right to life of the unborn--an assessment of the eighth amendment to the Irish constitution. Brigham Young University Law Review 1984(3): 371-402

Cordero-, G.; Ojasti, J., 1981: Comparison of capybara populations of open and forested habitats. Journal of wildlife management 45(1): 267-271

Robertson, C.; Millar, H., 1999: Hyperamylasemia in bulimia nervosa and hyperemesis gravidarum. The exact causes of hyperamylasemia detected in bulimia nervosa are unknown but it is presumed to be due either to repeated binging or to vomiting. This study set out to investigate the importance of vomiting in producing the raised serum amylase...