Functional acuity contrast sensitivity test results dependence on drusen localization in the macula

Abstract

The purpose of the work. To estimate functional acuity contrast sensitivity test by Ginsburg results dependens on drusen localisation in macula. Material and methods. We examined 61 (98 eyes) patients with diagnosis of age-related macular degeneration. Patients were devided into two groups according to the drusen localization in the macula region: I group 31 patient (50 eyes) 1 subfield, II group 30 patients (48 eyes) 2 and 3 subfields. A standard mobile grating comprised of three concentric circles with the diameters of 1000, 3000 and 6000 μm was used for measurements. Functional acuity contrast sensitivity was measured employing a Ginsburg Box, VSCR- CST-6500. Results. Functional acuity contrast sensitivity test results were worse in the I group: at the night time at 3 (p=0.048) and at 6 spatial frequencies (p=0.021), at the day time without glare at 6 spatial frequency (p=0.047), at the night time with glare at 3 (p=0.022) and at 6 spatial frequencies (p=0.033), and at the day time with glare in 1.5 (p=0.050) and in 3 spatial frequencies (p=0.031). Conlusion. Drusen localisation in I subfield mostly impact results decreasing at 3 and 6 spatial frequencies. The facts are, that functional acuity contrast sensitivity test results depends on drusen localisation and for this test is the important I subfield, because results are worse twice if drusen are localized in I subfield.