Search for: [Abstract = "None of the groups met the criteria for normal distribution, as confirmed by the Schapiro\-Wilk test. Distribution of the examined feature included various numbers of measurements and were characterized by considerably differing variations. There were also markedly outlying observations. In this situation, the statistical significance of the differences was examined by the Kruskal\-Wallis nonparametric test \(with a significance level of 0.05\). The significance of intra\-group differences was evaluated by the Dunn test. The interdependence analysis included age, best corrected visual acuity, intraocular pressure and bioelements content. A correlation matrix has been created. A set of variable derivatives was then prepared to take into account not only raw variables, but also their transformations such as logarithm. Strong correlations \(ranging from 0.75 to 1.0 or \-0.75 to \-1.0\) were observed only within groups of variables of the same origin, for example, the zinc content and its transformations. The other correlations between variables from different groups were low or very low. The following results were obtained in the bioelements content of cataractous lenses in particular groups of patients\: Ca content \(median values\)\: 425 ppm \(G1\), 472 ppm \(G2\), 768 ppm \(G3\)\; Fe content \(median values\)\: 5 ppm \(G1\), 6 ppm \(G2\), 2.8 ppm \(G3\)\; Zn content \(median values\)\: 39 ppm \(G1\), 63 ppm \(G2\), 153 ppm \(G3\). The relationships and differences in bioelements between the groups of patients were shown. Elevated levels of zinc and iron have been observed for patients treated for diabetes, which is consistent with other published data. On the other hand, samples from glaucoma patients showed the highest Zn content, often reaching values of several hundred ppm. In case of glaucoma it was impossible to refer to other studies because there is no literature on this topic. For any of the elements studied, no significant differences in the medians of gender have been found. All p values were significantly higher than the assumed significance level of 0.05. The p levels were as follows\: for zinc 0.2319, for iron 0.9227 and for calcium 0.9204. Using the decision tree method, the percentage and probability of diabetes and glaucoma were determined based on the content of zinc, iron and calcium in the lens. High calcium \(above 449 ppm\) and zinc \(above 80 ppm\) levels were observed among glaucoma patients and elevated iron levels \(above 16 ppm\) in diabetic patients."]

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