Can the Choroid Affect Primate Eye Size?
Earlier studies with chicks have shown that choroid thickness is actively regulated in response to retinal defocus and may be involved in the regulation of eye growth. In two articles in this issue, Troilo et al. (p. 1249) and Hung et al. (p. 1259) independently show that the primate choroid also undergoes changes in thickness associated with visual experience and experimentally induced changes in eye size and refraction. There is some evidence that these changes, although much smaller than those seen in chick, might also partially compensate for imposed retinal defocus. Troilo et al. [Abstract] [Full Text] Hung et al. [Abstract] [Full Text] Is There Conjunctiva-Associated Lymphoid Tissue in the Human? Although the mucosal immune system is of increasing relevance, there is still little evidence for a respective tissue in the eye, especially in the human. Knop and Knop (p. 1270), in a study on a number of human autopsy tissues, provide evidence for the existence of a conjunctiva-associa
