The pigmented passenger

A lady in her 50s came in with a curious complaint — a single, round, dark floater that came and went, more noticeable on waking or after eye rubbing. She'd seen it for past 6 months, on and off, and finally decided to get it checked. No flashes, no curtain, no vision drop. Just this one persistent, mobile circle.

Dilated exam showed a round, smooth, pigmented structure suspended in the mid-vitreous cavity, free-floating and drifting with eye movement — completely separate from the retina, with no attachment, no traction, and a normal fundus underneath.

A pigmented free-floating vitreous cyst — one of the rarer incidental findings in retina clinic. These are thought to be congenital remnants, arising from vestigial tissue of the hyaloid system or primitive medullary epithelium, and the pigment likely represents melanin-containing cells from remnants of the retinal pigment epithelium or uveal tissue swept into the cyst wall during development.

No treatment was needed. These cysts are benign, usually asymptomatic apart from the occasional visible floater, and simply need to be watched. She was counselled on the benign nature of the finding and reviewed periodically to confirm stability.

A gentle reminder that not every floater is vitreous degeneration — sometimes it's a small, pigmented piece of embryology, quietly drifting through a lifetime.