AI Article Synopsis
- The study assessed and compared classical and digital methods for analyzing the corneal endothelium in 36 eyes, with an average participant age of 32.8 years.
- Both classical and digital analyses provided different metrics, including cellular density and variability, with significant differences found between automatic and revised digital methods (P = 0.01).
- While the classical approach yielded a slightly lower cell density, no significant differences were observed at the 1% significance level; however, the revised digital analysis took considerably longer to complete.
Article Abstract
Aim: To compare results of classical and digital analysis of the corneal endothelium.
Material And Methods: We evaluated a group of 36 eyes with physiological findings of the anterior segment of the eye; the average age of examined persons was 32.8 years (SD +/- 9.5). The examination was performed by means of non-contact specular microscope SP 1000 TOPCON. The obtained finding was evaluated by means of (i) classical analysis, (ii) automatic digital analysis, and (iii) revised digital analysis. The result of the classical analysis is the cellular density (number of cells/mm2). The digital analysis is made possible by means of the connection of the specular microscope with the computer program IMAGENET. The Endothelial Analysis System evaluates furthermore the coefficient of the cellular area variation (%), and the hexagonality (%). The normality of the values' distribution was evaluated by means of the test Liliefors, subsequently the paired t-test or nonparametric Wilcoxon's test were used.
Results: Comparing results of the automatic to the revised digital analysis, statistically significant difference in all evaluated parameters was found (P = 0.01). The average cells' density calculated by means of classical analysis (2643 +/- 347) is by 3 % smaller than the value established by means of revised digital analysis (2718 +/- 330 cells/mm2). Regardless of that, no statistically evident difference was found at the 1% level of significance. In 13 cases the revised digital analysis showed lower values than the classical one, whereas in 23 cases the overestimation by revised digital analysis up to 501 cells/mm2 was found. To complete the classical analysis or the automatic digital analysis, it takes in average 7-8 minutes. The time needed to examine one sample of endothelium using the revised digital analysis was in the examined group 25-30 minutes.
Conclusion: Although there is no statistically significant difference (P = 0.01) between the revised digital analysis and the classical analysis, and between both methods there is statistically significant dependence (r = 0.82); it is necessary to consider their incomplete compatibility in case of results' interpretation in a single patient. The revised digital analysis is rather more time consuming, but supplies more information about the status of the endothelial single layer.
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