Vision is essential to interactions with the environment and survival of many animals. House crickets, Acheta domesticus, are nocturnal insects with compound apposition eyes, and thus may have a specialized visual system selected for low-light vision. Here, an analysis of regional variation in facet diameter around the eye of a cricket was conducted. Eye surface area was estimated and facet diameter was spot-sampled across the eyes of 13 adults and 13 juveniles. Juveniles had smaller facets than adults, and there was significant variation among eye regions in facet size. Specifically, larger facets were found in the posterior eye region. Overall, facets were large given the size of this animal's eye, which is consistent with what one might expect from a nocturnal insect under selection for high sensitivity. Furthermore, juveniles had proportionally larger facets than adults, which may indicate that the insects maximize the sensitivity of their ommatidia early in development, prior to increasing facet number to enhance visual resolution. No significant sexual dimorphism was found in absolute eye size, although males achieved equivalent eye size to females despite smaller body size. Regional variation was consistent between age classes and sexes.