Využití digitální modifikace Amslerova testu D Chart v oftalmologii a optometrii
| Title in English | Usage of digital modification of Amsler grid D Chart in ophthalmology and optometry |
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| Authors | |
| Year of publication | 2020 |
| Type | Article in Periodical |
| Magazine / Source | Česká a Slovenská oftalmologie |
| MU Faculty or unit | |
| Citation | |
| Web | online |
| Doi | http://dx.doi.org/10.31348/2020/25 |
| Keywords | D Chart; M-score; Amsler grid; ARM; spectacle correction; cylinder |
| Description | Aims: Metamorphopsia is important symptom of macular disease. The most common simple detection method of metamorphopsia is Amsler grid. Usually it is used monocularly with best correction for near. Patient should evaluate grid deformation a describe position of the deformity. This method is based on qualitative principle. For quantitative evaluation we can use Software D Chart (Thomson Software Solution). This instrument enables evaluate degree and position of the metamorphopsia in central visual field. Our goal was to establish M-score values in group of young healthy subjects without correction, with cylindrical spectacle lens and in group of patients with age related degeneration. Objects and Methods: We had 33 probands divided into 2 samples. The first sample contains 15 young probands with average age 23 years without any eye pathology. The second sample contains 18 patients with ARMD (7 with dry form and 11 with wet form). In our study we used software D Chart (Thomson Software Solution). This software was use in Acer PC with touchable screen. Level for statistic evaluation was set on p = 0.05. Results: We note total M-score in right eye of all probands. Natural M-score values for young probands was: median 0, minimum 0, maximum 2.3. With cylindrical lens we got these values: median 25.2, minimum 3.6, maximum 41.6. In second sample with probands suffer from ARMD we got these values: median 0.8, minimum 0, maximum 29.4. Wilcoxon non-parametric test was used for statistical evaluation. We proved statistically significant difference between all variables. M-score natural vs. M-score SL showed p < 0.001, M-score natural vs. M-score ARMD showed p = 0.04 and M-score SL vs. M-score ARMD showed p < 0.001. Conclusion: Our study showed statistically significant differences between variable M-score natural, M-score SL and M-score ARMD. We found that printed Amsler grid as well as its digital modification D Chart are suitable for following of metamorphopsia in central visual field. The main advantage of D Chart is quantitative evaluation of the test with M-score and digital registration of retinal changes during following of the patient. |
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