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Jeanette Cross, Edward Ng, My Diep, Claire Healy, Pinakin Gunvant Davey; Evaluation of contrast sensitivity function under mesopic conditions using CSV-1000E to establish normative database.. Invest. Ophthalmol. Vis. Sci. 2018;59(9):1078.
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© ARVO (1962-2015); The Authors (2016-present)
The CSV-1000E is a device that is commonly used in clinical practice and in research trials to evaluate contrast sensitivity function (CSF). The CSV-1000E has normative data available for various age groups under photopic conditions. We sought to investigate the CSF under mesopic conditions for CSV-1000E which is not available. Developing normative database for mesopic conditions can be very useful in eyes with pathological conditions compared to healthy controls.
Seventy-five eyes of 75 individuals was included in the study. The CSF was measured using the CSV-1000E. All individuals had a visual acuity of 20/20 or better on an ETDRS 100% contrast chart. Subjects underwent CSF measurement using CSV-1000E under binocular viewing condition at a distance of 8 feet in mesopic light levels in a randomized fashion. The light levels of CSV 1000E chart were 85 cd/m2. The mesopic condition was simulated using 1.5 neutral density filter. CSF was measured at spatial frequency of 3, 6, 12 and 18 CPD. The mean, SD, and 95% confidence intervals are calculated.
The mean age and SD of the subjects examined was 31.22 and 8.92 (21 males & 54 females). The table 1 provides the CSF for the subjects examined in the study. The mean log CSF was 1.66, 1.74, 1.23 and 0.80 respectively for 3, 6, 12 and 18 CPD. The shape of the CSF followed the CSF pattern under photopic conditions and as expected the 95% CI of were wide.
These results provided the mean and the spread of the visual function at low mid and high spatial frequencies as measured by CSE1000E. This data provides information needed for sample size and effect size estimation for future studies conducted.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
Contrast sensitivity under mesopic conditions
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