Reversible endothelial changes in the monkey cornea

As part of a study examining the effects of contact lens extended wear in monkeys (Macaca fascicularis), reversible endothelial changes were observed in the cornea with slit lamp biomicroscopy and contact specular microscopy. These changes were associated with anterior eye inflammation in four monkeys (as occurs in humans). However, in two monkeys no obvious cause for these changes other than the presence of a contact lens on the cornea was apparent. In these two monkeys the endothelium displayed features similar to the transient endothelial bleb response, which has been observed only in humans. The monkey (M fascicularis) may thus be an appropriate model for further investigation of the endothelial response during anterior eye inflammation and the transient endothelial bleb response.