title: The Arnold maneuver for expression of hard nuclei.
abstract: The Arnold maneuver can be used to express densely sclerotic nuclei. A small rotational prolapse places the superior pole of the nucleus in front of the iris in the incision plane prior to expression. This maneuver reduces intraocular manipulation and allows safe expression of the nucleus when there is a thin cortical envelope.
mesh_terms: D002387:Cataract Extraction / Q000379:methods*; D006801:Humans; D007907:Lens Nucleus, Crystalline