Computer Modeling Correlation between the Entering Wound and the Final Position
of the Metallic Intraocular Foreign Body
Došková H.1, Kršek P.2
1Oftalmologická klinika LF MU a FN, Brno Bohunice, přednosta prof. MUDr. Eva Vlková, CSc. 2Ústav počítačové grafiky a multimedií FIT VUT, Brno, vedoucí ústavu doc. Dr. Ing. Pavel Zemčík |
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Summary:
Aim: The aim of this study was to establish the correlation coefficient between
given parameters of the entering wound and final position of the metallic
intraocular foreign body. Material and methods: fifty patients (50 eyes) with
a penetrating injury of the eye and present metallic intraocular foreign body
were included in this study. Clinically found data of the entering wound and
final position of the intraocular foreign body (IFB) as well were transformed
with a computer model into the three-dimensional parameters. Both chirurparameters
were statistically evaluated by means of correlation analysis, and
correlation coefficient and determination coefficient were calculated.
Results: The extent of correlation between two variables is called correlation
coefficient. The coefficient values range between -1 to +1. The closer is the
calculated value to ranges (to -1 or to +1) the more are the two variables more
correlated. The coefficient of determination values range from 0 to +1. The
closer the results are to +1, the better the model describes the dependence
between the two variables. The results obtained by means of correlation
analysis were for the correlation coefficient 0.454, and for the coefficient of
determination 0.6411 respectively.
Results: Results of the correlation analysis show that the knowledge of
coordinates of the entering wound has no prediction value for final position of
the foreign body in the eye. These two variables are not correlated and so the
accurate final position of the foreign body cannot be predicted. The final
position of the intraocular metallic foreign body is probably influenced by
biophysical factors not included in this study.
Key words:
penetrating injury of the eye, metallic intraocular foreign body,
correlation analysis, computer modeling
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