The perception of affordances for the actions of other people (actors) was examined. Observers judged the maximum and preferred sitting heights of tall and short actors. Judgments were scaled in centimeters, as a proportion of the observer's leg length, and as a proportion of each actor's leg length. In Experiment 1 observers viewed live actors standing next to a chair. When judgments were scaled by actor leg length, they reflected the actual ordinal relation between the capabilities of the actors. The perception of affordances from kinematic displays was then evaluated. Observers differentiated tall and short actors, but only when the displays contained direct information about relations between the actors and the chair. It is concluded that observers can perceive affordances for the actions of actors and that kinematic displays can be enough to support such percepts if they preserve actor-environment relations that define affordances.

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In cases of corneal edema and in the absence of any identifiable ocular causes, a review of toxic effects of systemic medication should be undertaken. Amantadine can cause corneal decompensation and needs to be considered as part of the differential diagnosis of corneal edema.

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A case of orbital metastasis of cervical keratinizing squamous cell carcinoma is presented. The patient, in remission from primary cervical and ovarian cancers, presented with complaints of left eye ptosis and pain. Examination revealed the presence of a moderately tender mass along the left supra-temporal orbital rim and downward displacement of the left globe. Computed tomography revealed a poorly circumscribed mass with superior lateral wall bone loss. Excised tissue contained invasive, poorly differentiated nests of pan keratin and epithelial membrane antigen-positive squamous cells with numerous pleomorphic multinucleated giant cells. Multiple treatment regimes were unsuccessful, and the patient expired due to disease complications after 3 months.