It is a rare enough form that the comparison is not whimsy but a useful descriptor: two circular monuments connected by a narrow causeway-like strip of stone, the whole arrangement measuring out in a way that feels almost deliberate, almost playful, and yet predates any human notion of eyewear by millennia.

The northern of the two cairns is the better understood. Nine stones are arranged radially, that is, set like the spokes of a wheel pointing outward from a central mass, forming a ring roughly six metres in diameter. They protrude from the surface of a disturbed cairn, a prehistoric mound of stones that has been interfered with at some point in its history, rising to a maximum height of just half a metre. The individual stones vary considerably, from low slabs barely twenty centimetres above the cairn surface to uprights reaching almost sixty centimetres. A narrow causeway, only half a metre wide and three metres long, runs to the south-west and connects this cairn to its companion monument. Two further upright stones push out from the north-western edge of this causeway, adding to the sense of something structured and considered. Radial-stone cairns are not common in the Irish archaeological record, and paired examples of this kind are rarer still, which gives the Rusheen site a quiet significance that its modest scale might not immediately suggest.

The site sits on a flat terrace within a woodland setting, which means the stones are partly framed by tree cover. Anyone visiting would want to move around the full perimeter of both cairns to appreciate the connecting causeway, since the spectacles-like ground plan only becomes legible when the relationship between the two monuments is seen as a whole rather than in parts.