Sir,

Seton, derived from the Latin word seta,1 meaning bristle. The concept of a seton to maintain patency of internal filtering ostium by keeping the edges permanently separated has been attempted in many forms. Materials ranging from horsehair to metals (titanium) to polyethylene have been utilised.2 Since it was first introduced as a modern surgical device in 1969 by Molteno,3 glaucoma drainage implants are known to cause several complications.4 We report an unusual case of migration of ‘seton’, which was a modified long tube version used as glaucoma drainage implant, into the anterior chamber.

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