[Localization of scotomas in AMD by reading test : Random series of words in standardized format]. / Lokalisation von Skotomen mittels Lesetest bei AMD : Willkürliche Wortserien in standardisiertem Format.

ABSTRACT

BACKGROUND: Reading performance that can be measured by reading tests depends on whether reading material with or without contextual continuity is used. OBJECTIVE: The goal of this study was to create a German version of the SKread test and to evaluate it in a clinical setting. MATERIAL AND METHODS: The evaluation of the SKread test was first performed on two groups of visually healthy subjects of different ages a junior group of 25 persons with ages between 20 and 30 years (mean = 25.84 years, SD ± 2.41 years) and a senior group of 25 persons with ages between 51 and 84 years (mean = 62.40 ± 8.46 years). The same measurements were also performed on a group of 18 patients with age-related macular degeneration (AMD) with ages between 75 and 95 years (mean = 81.89 ± 5.48 years). The reading performance was also measured using Radner charts. RESULTS: Using reading material without syntactic continuity considerably slowed down the reading speed and increased the error rate. Median reading rates of 11.53 characters/s (CPS) for the junior group and 8.96 CPS for the senior group were clearly lower than those for the Radner charts (22.02 CPS and 18.48 CPS, respectively). In the AMD patients, a statistical analysis of the error rates showed a highly significant difference between the Radner charts and the SKread test (p = 0.00014). Furthermore, by analyzing the errors made in the SKread test information could be obtained about the position of central scotomas. The test-retest reliability of the SKread was very good. CONCLUSION: Information about the position of a central scotoma can be acquired by using the SKread test and an analysis of reading errors, which can augment effective clinical monitoring in AMD and subsequent visual rehabilitation.