Accuracy of intraocular lens power calculation using partial coherence interferometry in patients with high myopia

• Published in: Ophthalmic & physiological optics 2012-05, Vol.32 (3), p.228-233
• Main Authors: Roessler, Gernot F, Dietlein, Thomas S, Plange, Niklas, Roepke, Anna-Katharina, Dinslage, Sven, Walter, Peter, Mazinani, Babac A
• Format: Article
• Language: English
• Subjects: Aged; Biological and medical sciences; Biometry - methods; Cataract - complications; Eye and associated structures. Visual pathways and centers. Vision; Fundamental and applied biological sciences. Psychology; Haigis formula; high myopia; Humans; Interferometry - methods; intraocular lens; Lens Implantation, Intraocular - methods; Lenses, Intraocular; Medical sciences; Middle Aged; Myopia - complications; Myopia - pathology; Myopia - physiopathology; Ophthalmology; optical biometry; partial coherence interferometry; Phacoemulsification - methods; Refraction, Ocular - physiology; Retrospective Studies; Vertebrates: nervous system and sense organs; Vision disorders; Visual Acuity - physiology
• ISSN: 0275-5408; 1475-1313
• DOI: 10.1111/j.1475-1313.2012.00903.x

Citation information: Roessler GF, Dietlein TS, Plange N, Roepke A‐K, Dinslage S, Walter P, Mazinani BAE. Accuracy of intraocular lens power calculation using partial coherence interferometry in patients with high myopia. Ophthalmic Physiol Opt 2012, 32, 228–233. doi: 10.1111/j.1475‐1313.2012.00903.x Purpose:  Ultrasound‐A‐scan‐biometry intraocular lens power calculation for cataract surgery sometimes shows lack of accuracy in patients with high myopia. The purpose of this retrospective study was to assess the accuracy of lens power calculation with optical biometry using the Zeiss IOLMaster across a large range of myopia levels. Methods:  We included 37 consecutive, myopic eyes with an axial length >26.5 mm (31 patients, 62 ± 13 years old, average preoperative refraction of –14.46 ± 6.61 D, range −3.5 to −32.0 D), which underwent phacoemulsification and implantation of an intraocular lens following biometry using the IOLMaster. For lens power calculation, the Haigis formula was used in all cases. For comparison, refraction was back‐calculated using the SRK/T and Holladay I formulae. Results:  The preoperative mean axial length was 29.37 ± 2.44 mm with a range of 26.50–35.52 mm. Thirty eyes (81.1%) showed a postoperative spherical equivalent which differed 1.00 D or less from the predicted value, in 20 cases (54.1%) the postoperative refractive error was within ± 0.50 D. The mean absolute error (MAE) was 0.70 ± 0.59 D (Holladay I, 0.85 ± 0.68; SRK/T, 1.01 ± 0.61 D). Conclusions:  Optical biometry for intraocular lens power calculation seems to deliver reliable results for cataract surgery in patients with high myopia, although our data describe an increasing lack of accuracy beyond an axial length of 30 mm. The Haigis formula provided the best predictability of postoperative refractive outcome for myopic eyes in general.