title: [Partial coherent interferometry--an alternative method for intraocular lens power calculation performed by ultrasonography].
abstract: OBJECTIVE
  To compare axial length estimated by means of Zeiss IOLMaster and A-scan ultrasonography and anticipate postoperative refraction after IOL implantation with refraction measured after operation.
  
  
  METHODS
  26 patients were analyzed. Measurement of axial length was performed by Zeiss IOLMaster and A-scan ultrasonography. Preoperative refraction was determined by both methods based on SRK/T calculation formula and 119.0 and 120.5 A-constant for IOL. Postoperative refraction was expressed as a spherical equivalent and was obtained by autokeratorefraktometry in the first day after cataract surgery.
  
  
  RESULTS
  Mean axial length measured by IOLMaster was longer by 0.06 mm in compared to ultrasound estimation (p < 0.001). The correlation between pre-operative refraction values determined by IOLMaster and post-operative measurements was statistically significant (p = 0.03).
  
  
  CONCLUSIONS
  Measurement of axial length performed by IOLMaster is longer than by ultrasonography. IOLMaster seems to be more reliable method than ultrasonography in intraocular artificial lens calculation in cataract surgery.
authors.affiliation: Z Okregowego Szpitala Kolejowego w Katowicach.
authors.forename: Edward
authors.initials: E
authors.lastname: Wylegała
authors.forename: Aneta
authors.initials: A
authors.lastname: Ludyga
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006801:Humans; D007368:Interferometry / Q000379:methods; D007910:Lenses, Intraocular; D008027:Light; D008297:Male; D008875:Middle Aged; D012029:Refraction, Ocular; D015203:Reproducibility of Results