title: Intraoperative retinoscopy for intraocular lens power estimation in cases of combined phacoemulsification and silicone oil removal.
abstract: OBJECTIVE
  To study the application of intraoperative retinoscopy for intraocular lens (IOL) power calculation in combined cataract extraction and silicone oil removal.
  
  
  METHODS
  Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
  
  
  METHODS
  This study comprised patients with silicone oil-filled eyes and visually significant cataract who had combined cataract extraction by phacoemulsification and silicone oil removal by a standard method through the pars plana route. Retinoscopy was performed with a streak retinoscope, standard vertex distance of 13.0 mm, and distance of 50.0 cm. All eyes had in-the-bag implantation of a foldable IOL with an A-constant of 118.4. The IOL power was calculated using the Ianchulev formula as follows: R x 2.01449. Postoperative refraction was performed at 3 months, and the spherical equivalent was calculated.
  
  
  RESULTS
  Twelve eyes of 12 patients were evaluated. The mean emmetropic power calculated by intraoperative retinoscopy was 20.46 diopters (D) +/- 3.4 (SD) (range 13.09 to 25.18 D) and the mean refractive error, -0.45 +/- 0.63 D (range -1.00 to +1.00 D). The postoperative refractive error was within +/-0.50 D in 4 eyes (33.3%) and within +/-1.00 D in all eyes. Ten eyes (83.33%) had a postoperative refractive error in the range of 0.00 to -1.00 D using IOL power based on intraoperative retinoscopy.
  
  
  CONCLUSIONS
  Intraoperative retinoscopy for IOL power calculation in combined cataract extraction and silicone oil removal gave satisfactory refractive outcomes, although further studies with more patients are required to confirm its usefulness and determine whether there are disadvantages.
authors: Dr. Rajendra Prasad Centre for Ophthalmic Sciences, AIIMS, New Delhi, India. patwardhan.sourabh@gmail.com
authors: Sourabh D
authors: SD
authors: Patwardhan
authors: Rajvardhan
authors: R
authors: Azad
authors: Yograj
authors: Y
authors: Sharma
authors: Bhuvan
authors: B
authors: Chanana
authors: Jaideep
authors: J
authors: Tyagi
mesh_terms: D000293:Adolescent; D000328:Adult; D001699:Biometry; D002386:Cataract / Q000150:complications; D004322:Drainage / Q000379:methods*; D006801:Humans; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008875:Middle Aged; D016343:Monitoring, Intraoperative; D009216:Myopia / Q000175:diagnosis; D018918:Phacoemulsification; D012029:Refraction, Ocular / Q000502:physiology*; D012163:Retinal Detachment / Q000601:surgery; D042262:Retinoscopy; D012827:Silicone Oils
chemical_list: D012827:Silicone Oils