title: Piggyback intraocular lens implantation.
abstract: The piggyback method of implanting two intraocular lenses in one eye has been successfully expanded to address pseudophakic refractive error in normal eyes and eyes that have undergone post-penetrating keratoplasty. Piggyback implantation has been combined with the use of newly available minus-power lenses to provide appropriate power for a cataract patient with keratoconus, as well as to correct pseudophakic myopia. The phenomenon of increased depth of focus in piggybacks may be explained by a contact zone between the lenses. The late complication of inter-lenticular cellular growth with resultant hyperopic shift, opacification, and loss of vision has recently become a concern.
authors.affiliation: St. Luke's Cataract and Laser Institute, Tarpon Springs, FL 34683, USA.
authors.forename: R E
authors.initials: RE
authors.lastname: Fenzl
authors.forename: J P
authors.initials: JP
authors.lastname: Gills
authors.forename: J P
authors.initials: JP
authors.lastname: Gills
mesh_terms: D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D055095:Optics and Photonics; D011474:Prosthesis Design; D012029:Refraction, Ocular; D054140:Refractive Surgical Procedures