title: [Difficult cases in biometry measurement].
abstract: A few problems have not yet been resolved concerning intraocular lens (IOL) power calculation in difficult cases. Patients can be divided into three groups: Group 1, patients with no previous ocular surgery but with unusual anatomy (staphyloma, high hyperopic eyes, etc.); Group 2, patients with previous surgery except refractive surgery; Group 3, patients with previous refractive surgery. Various techniques must be used to increase the accuracy of IOL calculation. B-mode biometry and optical coherence tomography are suitable tools to increase the accuracy of axial length measurement. Computerized videokeratography can be helpful. However, the most difficult cases seem to be those in Group 3.
authors.affiliation: Cabinet Ophtalmologique, 14, avenue Breteuil, 75007 Paris.
authors.forename: M
authors.initials: M
authors.lastname: Puech
mesh_terms: D001699:Biometry / Q000379:methods*; D005128:Eye Diseases / Q000175:diagnosis* / Q000601:surgery*; D006801:Humans; D054018:Lasers, Excimer; D018903:Photorefractive Keratectomy / Q000379:methods; D012030:Refractive Errors / Q000175:diagnosis*; D054140:Refractive Surgical Procedures