title: Is the Capsular Bag Perimeter Round or Elliptical?
abstract: OBJECTIVE
  To report findings that could suggest an elliptical shape of the capsular bag.
  
  
  METHODS
  Five eyes of three patients with axial length greater than 24 mm underwent phacoemulsification cataract surgery with plate-haptic multifocal toric intraocular lens (IOL) implantation oriented in the vertical meridian.
  
  
  RESULTS
  In all cases, correct orientation of the IOLs was verified 30 minutes after surgery. After 24 hours, all eyes demonstrated unwanted rotation of the IOLs ranging from 15 to 45 degrees. The IOLs remained stable in the new position in all cases until adhesion of the capsular bag took place.
  
  
  CONCLUSIONS
  These observations could suggest that the perimeter of the capsular bag has an elliptical shape. Therefore, the IOL tends to become fixated in a meridian of the capsular bag that best fits the diagonal diameter of the IOL.
authors.affiliation: Department of Ophthalmology, Instituto Oftalmológico Amigó, Tenerife, Spain.
authors.forename: Alfredo
authors.initials: A
authors.lastname: Amigó
authors.affiliation: Department of Ophthalmology, Instituto Oftalmológico Amigó, Tenerife, Spain; Department of Physics, University of La Laguna, Tenerife, Spain.
authors.forename: Sergio
authors.initials: S
authors.lastname: Bonaque-González
keywords: Capsular Bag; Cataract Surgery; Intraocular Lens; Phacoemulsification Surgery