The influence of various external parameters on the mechanical properties of the vitreous of pig eyes as characterized by a spring constant D₀ and a friction constant r_z was investigated. For human donor eyes, D₀ turned out to be about 60% larger than in pig eyes, whereas the friction constant was increased by roughly 25%.

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In order to achieve a controlled extraction of ferromagnetic intraocular foreign bodies, experiments were performed with pulsed magnets. It turned out that the vitreous bodies of the eyes used in the investigation were rubber-elastic, rather than visco-elastic, with relaxation times of the order 100 msec.

A massive impalement injury to a 46-year-old man led to corneoscleral laceration, partial aniridia, traumatic cataract and rupture of the orbiculus ciliaris of more than one third of the circumference with extreme hypotony and practically blinding. In addition there was a massive circular haemorrhage into the suprachorioidal space. The course of the operative intervention leading to complete replantation of the ciliary body and so finally to normalisation of the intraocular pressure is described. The gratifying course could have been favoured by the diffuse retrochorioidal haemorrhage.