Purchase this article with an account.
C. Sanchez–Ramos, I. Moral–Martinez, M.J. Perez–Carrasco, A. Langa–Moraga, M. Sillero, M.C. Puell; Macular Photostress Recovery Times In Elderly Persons Determined In Photopic Conditions . Invest. Ophthalmol. Vis. Sci. 2006;47(13):5350.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
To measure the photostress recovery times (PSRT) shown by elderly persons according to age and sex, and establish possible relationships between this and other visual variables.
Tests were performed on 1103 subjects aged 50 to 90 years (mean 68±6 years). The population was stratified by sex as: 132 women of mean age 65±5 years and 971 men of mean age 68±6 years; and by age as: 772 subjects aged <70 years (A1) and 331 subjects aged >70 years. Recovery times after exposure to a glare source for 10 s, and photopic and mesopic visual acuity were measured using an Ergovisión® instrument (Essilor). Contrast Sensitivity (CS) with and without glare were determined using the CGT 1000 (6 stimulus sizes –6.3 to 0.7 degrees; 12 levels of contrast –0.01 to 0.45; 8 peripheral glare sources) at photopic luminance levels. In each subject, a complete anamnesis was undertaken.
The mean PSRT for the entire population was 69±42 s (range 6 – 258 s). A difference of 7.17 s (P=0.009) was recorded between the two age groups A1 and A2. The loss in visual acuity due to the drop in the luminance level was 0.5±0.2. Age caused a decrease in contrast sensitivity with glare for all the stimulus sizes. Women showed a shorter PSRT than men (61 s versus 70 s; P=0.014). The remaining visual variables failed to vary according to sex. When the population was divided into two groups according to the PPRT as R1<80 s (n=657; 41±22 s) and R2 >80 s (n=446; 111±27), the PPRT was found to correlate with losses in photopic/mesopic visual acuity (P=0.000). The PPRT was also related to CS with glare for visual angle degrees of 2.5; 1.6 and 1 (P=0.013; P=0.006; P=0.000, respectively).
Both the age and sex of the subjects showed a significant effect on the times taken to recover from a burst of photopic glare. In subjects over 50 years, correlations were observed between the photostress recovery time and the factors mesopic visual acuity loss and contrast sensitivity for intermediate target sizes
This PDF is available to Subscribers Only