Heart-shaped hippie sunglasses in blue and pink

The gold detail sitting at each outer corner

Look at each side of the frame where the rim turns and the arm takes over. On each side there is a small coiled ornament in the same gold tone, standing very slightly proud of the wire. It is the only piece of relief on a front that is otherwise completely flat: the rim is plain wire, the bar across the top of each lens is plain, and nothing anywhere else is raised or textured. The two ornaments match each other exactly, so the front reads the same whichever side you pick the pair up from. Hold the pair at arm's length and those ornaments are the only thing interrupting the outline; from any further back each side reads as one unbroken loop of wire. To place it among the rest, see which other frames carry a straight bar across the top.

Three things the photographs settle

1. The two hearts never meet. The rim closes on itself around each lens, and the only thing crossing the gap above the nose is a single raised arch.
2. The tint runs top to bottom rather than side to side: strongest blue against the upper rim, pink down at the point, and a pale, almost clear band holding the middle of the lens.
3. The black ends are the one exception to the colour. Rim, top bar, bridge and arms all carry the same gold tone, so the eye reads the frame as one continuous line until it reaches the tips, where the finish changes and the run of gold stops.

Heart-shaped sunglasses, blue at the brow and pink at the point

On the face, the outline registers before the colour does. It is wide, it is unmistakably a heart, and it can be read from across a room, which is rather the point of a pair like this. The wire construction stops it from looking heavy: there is very little material on show, so the tint has room to do the work. Fold the arms and the whole thing lies almost flat, which matters if it lives in a bag for most of the summer. Kept alongside the rest of the range that finishes an outfit, it belongs with the bright-day, open-air half of a wardrobe.