Diagrams of the Compound Eye

Facet lenses Facet lenses Crystalline cones, Pigment Cells, Rhabdom Crystalline cones, Pigment Cells, Rhabdom Compound eye cut-away Compound eye cut-away Rhabdom Rhabdom Retinula cell Retinula cell Screening pigment granules and microvilli Screening pigment granules and microvilli Microvilli of a rhabdom Microvilli of a rhabdom Microvilli and screening pigments of 3 rhabdom cells Microvilli and screening pigments of 3 rhabdom cells Microvilli and screening pigments of a rhabdom cell Microvilli and screening pigments of a rhabdom cell

Diagrams of the Compound Eye

Cut-away of the compound eye. 

Reading About Eyes & Fiddler Crabs

Eyes:
Land MF, Nilsson D-E (2012) Animal Eyes. Oxford University Press.

Warrant E, Nilsson D-E (2007) Invertebrate Vision. Cambridge University Press

Fiddler Crabs:
Zeil J, Hemmi JM (2006) The visual ecology of fiddler crabs. Journal of Comparative Physiology A 192: 1-25.

Smolka J, Hemmi JM (2009) Topography of vision and behaviour. Journal of Experimental Biology 212: 3522-3532.