title: Accuracy of user-adjusted axial length measurements with optical biometry in eyes having combined phacovitrectomy for macular-off rhegmatogenous retinal detachment.
abstract: To evaluate the accuracy of user-adjusted axial length (AL) measured by optical biometry for intraocular lens (IOL) calculations in eyes having combined phacovitrectomy for macula-off rhegmatogenous retinal detachment (RRD).
  
  
  
  Ophthalmology Department, Calderdale Royal Hospital, Halifax, United Kingdom.
  
  
  
  Retrospective case series.
  
  
  
  Consecutive eyes having phacovitrectomy for macula-off RRD were evaluated. The ALs were measured using optical biometry with user adjustment to identify a posterior peak corresponding to the eye's AL and ultrasound (US). These were compared with each other and with the postoperative optical biometry and analyzed for accuracy as an indication of the eye's AL.
  
  
  
  The study comprised 22 eyes of 22 patients. There was no statistically significant difference between the mean AL measurements derived from user-adjusted optical biometry and US AL (P = .964). The user-adjusted optical biometry was not statistically significantly different from the postoperative optical biometry (P = .242). Compared with the postoperative optical biometry, the IOL power was within ±0.5 diopter in 12 (92%) of 13 cases (95% confidence interval [CI], 77.8 to 100.0) for user-adjusted optical biometry and in 10 (77%) of 13 cases (95% CI, 54.0 to 99.8) for US measurements.
  
  
  
  User-adjusted optical biometry could be used as an alternative method for measuring AL in macula-off RRD with combined phacovitrectomy. However, optical biometry would require assessment of agreement with US AL in cases in which a posterior peak is not easily identifiable. User-adjusted optical biometry might outperform US AL when calculating IOL power; however, a larger study should be performed to confirm this.
  
  
  
  None of the authors has a financial or proprietary interest in any material or method mentioned.
authors: From the Department of Ophthalmology (Rahman, Kolb, Bong), Calderdale Royal Hospital, West Yorkshire, and the School of Human and Health Sciences (Stephenson), University of Huddersfield, Queensgate, Huddersfield, United Kingdom. Electronic address: rubina.rahman@nhs.net.
authors: Rubina
authors: R
authors: Rahman
authors: From the Department of Ophthalmology (Rahman, Kolb, Bong), Calderdale Royal Hospital, West Yorkshire, and the School of Human and Health Sciences (Stephenson), University of Huddersfield, Queensgate, Huddersfield, United Kingdom.
authors: Simon
authors: S
authors: Kolb
authors: From the Department of Ophthalmology (Rahman, Kolb, Bong), Calderdale Royal Hospital, West Yorkshire, and the School of Human and Health Sciences (Stephenson), University of Huddersfield, Queensgate, Huddersfield, United Kingdom.
authors: Chun Xiao
authors: CX
authors: Bong
authors: From the Department of Ophthalmology (Rahman, Kolb, Bong), Calderdale Royal Hospital, West Yorkshire, and the School of Human and Health Sciences (Stephenson), University of Huddersfield, Queensgate, Huddersfield, United Kingdom.
authors: John
authors: J
authors: Stephenson
mesh_terms: D001699:Biometry; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D055095:Optics and Photonics; D018918:Phacoemulsification; D012029:Refraction, Ocular; D012163:Retinal Detachment / Q000601:surgery*; D012189:Retrospective Studies; D006113:United Kingdom