Self-retaining iris retractor used in cryo-extraction of lens.

@article{Rai1978SelfretainingIR,
  title={Self-retaining iris retractor used in cryo-extraction of lens.},
  author={Gurcharan S. Rai},
  journal={Indian journal of ophthalmology},
  year={1978},
  volume={26 3},
  pages={32}
}