Effects of aging on optical quality and visual function
| Autor: | Montserrat Aguirre, Meritxell Vilaseca, Joan A Martínez‐roda, Juan C. Ondategui, Jaume Pujol |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Òptica i Optometria, Universitat Politècnica de Catalunya. GREO - Grup de Recerca en Enginyeria Òptica |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Male
Aging Visual acuity genetic structures Visual Acuity Percepció visual 0302 clinical medicine Scattering Radiation Prospective Studies Prospective cohort study optical quality Middle Aged Optical quality Ciències de la visió::Optometria [Àrees temàtiques de la UPC] Visual function Vision disorders Female medicine.symptom Adult medicine.medical_specialty age-related Contrast Sensitivity 03 medical and health sciences Age modulation transfer function Age groups Optical transfer function Ophthalmology medicine visual function Humans Visió Aged contrast sensitivity Agudesa visual business.industry intraocular scattering eye diseases Ageing Reference values Contrast sensitivity (Vision) 030221 ophthalmology & optometry Optometry sense organs Edats de la vida business 030217 neurology & neurosurgery |
| Zdroj: | Recercat. Dipósit de la Recerca de Catalunya instname UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | Background: We assessed the effects of aging on visual function and optical quality in a healthy adult population and provide reference values for different age ranges. Methods: We conducted a prospective study with 198 healthy volunteers from31 to 70 years of age. The visual acuity (VA) and contrast sensitivity (CS) at 3, 6, 12 and 18cycles per degree (cpd) frequencies were assessed, together with values of optical quality and intraocular scatter- ing obtained with a double-pass system(Optical Quality Analysis System– OQAS), specifically the modulation transfer function cutoff frequency (MTFcutoff), the Strehl ratio, the OQAS values (OV) at contrasts of 100, 20 and nine per cent and the objective scatter index (OSI). We studied the change of these variables with age and obtained standard values for optical quality and intraocular scattering parameters for four age groups: 31 to 40, 41 to 50, 51 to 60 and 61 to 70 years. Results: We found significant correlations between age and all variables analysed and signifi- cant differences among the age groups considered except for CS (3 cpd) (p= 0.067). Ageing particularly affected low-contrast parameters, such as theOV nine per cent and theOSI, which decreased to 37 and 50 per cent of their original values, respectively.TheOSIwas found to pro- vide high sensitivity and specificity values, when healthy and caratactous eyes were considered. The results suggest that optical deficits are compensated until 50 years of age with sensory and perceptual factors, as smaller changes were found for visual function than for objective mea- surements of optical quality and intraocular scattering. Conclusions: Measures of optical quality assessed by subjective psychophysical and objective techniques varied differently with age. Values obtained for each age group can be used to de- termine normal limits of optical quality and intraocular scattering for diagnosis of ocular conditions. |
| Databáze: | OpenAIRE |
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