  == Selection Pressures == This article does touch on some selection forces such as eyespots allowing for circadian patterns, higher resolution aiding in survival/predation, and better recognition with color vision.  However, I feel it has some gaps in evolutionary forces and their effects.  I think the article could benefit from further explanation in the evolutionary baggage category.  This topic is very interesting, but I think it could be more informational with some additions as suggested in the “Evolutionary baggage” category of this talk page.  The article also points out that the earliest photosensitivity was developed aquatically.  In addition to the light filtering effects of water, the refractive indexes would be different for an organism in air.  I feel it would be a useful addition to include some information about how these forces worked on the original aquatic eye.       == Moulting Example == I made an addition to the Early Eyes section.  I was interested in how the layers allowing for specialization in transparent humour or air and water operation, could be involved in moulting.  I thought it could be an interesting addition to include an example.   http://onlinelibrary.wiley.com/doi/10.1111/j.1502-3931.2008.00138.x/abstract;jsessionid=794AD37010C17B485C06DD42029A308E.f03t04   