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4. CONCLUSION<br />

In this paper we have demonstrated how a <strong>first</strong> <strong>order</strong><br />

<strong>wave</strong> <strong>equation</strong> can be used to model some aspects <strong>of</strong><br />

<strong>the</strong> propagation <strong>of</strong> epi<strong>the</strong>lial cells <strong>in</strong> <strong>the</strong> posterior capsule,<br />

namely, <strong>the</strong> formation <strong>of</strong> relatively regular islands<br />

<strong>of</strong> cells which gradually cover <strong>the</strong> whole back surface <strong>of</strong><br />

<strong>the</strong> capsule.<br />

Acknowledgment<br />

The authors would like to express <strong>the</strong>ir gratitude to Mr<br />

D. J. Spalton from <strong>the</strong> Department <strong>of</strong> Ophthalmology<br />

<strong>of</strong> St Thomas’ Hospital for <strong>the</strong> specification <strong>of</strong> <strong>the</strong> problem,<br />

<strong>the</strong> provision <strong>of</strong> <strong>the</strong> image data and for many useful<br />

discussions.<br />

5. REFERENCES<br />

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[8] A. P. Papliński and J. F. Boyce, “Co-occurrence arrays<br />

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10 Annual Conference, TENCON’97, (Brisbane),<br />

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[10] F. van der Heijden, “Edge and l<strong>in</strong>e feature extraction<br />

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[11] M. Petrou and J. Kittler, “Optimal edge detectors<br />

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[4] S. A. Barman, J. F. Boyce, D. J. Spalton, P. G.<br />

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[5] D. J. Spalton and P. G. Ursell, “Incidence <strong>of</strong> PCO<br />

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Management, June 1996. Seattle, Wash<strong>in</strong>gton.<br />

[6] A. P. Papliński and J. F. Boyce, “Segmentation<br />

<strong>of</strong> a class <strong>of</strong> ophthalmological images us<strong>in</strong>g a directional<br />

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