[Partial coherent interferometry--an alternative method for intraocular lens power calculation performed by ultrasonography]
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Updated: Aug 21, 2026
Scanning Light Scattering Profiler (SLPS) Based Methodology to Quantitatively Evaluate Forward and Backward Light Scattering from Intraocular Lenses
Published on: June 6, 2017
Edward Wylegała1, Aneta Ludyga
1Z Okregowego Szpitala Kolejowego w Katowicach.
Purpose:
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.
Material And 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.
