Biometry and intraocular lens power calculation

Current Opinion in Ophthalmology

Volumn 16, Issue 1, 2005, Pages 61-64

  Findl, Oliver ^a  

^a MEDICAL UNIVERSITY OF VIENNA   (Austria)

Author keywords

Biometry; Cataract surgery; Intraocular lens power calculation

Indexed keywords

BIOMETRY; CATARACT EXTRACTION; EVALUATION; HUMAN; LENS IMPLANT; LENS POWER; MEDICAL LITERATURE; NONHUMAN; PRIORITY JOURNAL; REFRACTION ERROR; REVIEW; TREATMENT OUTCOME;

ANTERIOR CHAMBER; BIOMETRY; CORNEA; EYE; HUMANS; LENSES, INTRAOCULAR; OPTICS; POSTOPERATIVE COMPLICATIONS;

EID: 15044341841     PISSN: 10408738     EISSN: None     Source Type: Journal    
DOI: 10.1097/00055735-200502000-00011     Document Type: Review

References (26)

1. Olsen T: Sources of error in intraocular lens power calculation. J Cataract Refract Surg 1992; 18:125-129.
2. Boerrigter RM, Thijssen JM, Verbeek AM: Intraocular lens power calculations: the optimal approach. Ophthalmologica 1985; 191:89-94.
3. Olsen T: Theoretical approach to intraocular lens calculation using Gaussian optics. J Cataract Refract Surg 1987; 13:141-145.
4. Holladay JT: Evaluating the intraocular lens optic. Surv Ophthalmol 1986; 30:385-390.
5. Fercher AF, Roth E: Ophthalmic laser interferometer. Proc SPIE 1986; 658:48-51.
6. Drexler W, Findl O, Menapace R, et al. Partial coherence interferometry: a novel approach to biometry in cataract surgery. Am J Ophthalmol 1998; 126:524-534.
7. Drexler W, Hitzenberger CK, Baumgartner A, et al. Investigation of dispersion effects in ocular media by multiple wavelength partial coherence interferometry. Exp Eye Res 1998; 66:25-33.
8. Findl O, Drexler W, Menapace R, et al. Accurate determination of effective lens position and lens-capsule distance with 4 intraocular lenses. J Cataract Refract Surg 1998; 24:1094-1098.
9. Eleftheriadis H: IOLMaster biometry: refractive results of 100 consecutive cases. Br J Ophthalmol 2003; 87:960-963. Study that confirms the improvement of refractive results with optical biometry compared with applantion ultrasound, as found in previous studies.
10. Nemeth J, Fekete O, Pesztenlehrer N: Optical and ultrasound measurement of axial length and anterior chamber depth for intraocular lens power calculation. J Cataract Refract Surg 2003; 29:85-88. Study that confirms the precision and reproducibility of the optical biometry method found in previous studies.
11. Vogel A, Dick HB, Krummenauer F: Reproducibility of optical biometry using partial coherence interferometry: intraobserver and interobserver reliability. J Cataract Refract Surg 2001; 27:1961-1968.
12. Findl O, Kriechbaum K, Sacu S, et al. Influence of operator experience on the performance of ultrasound biometry compared to optical biometry before cataract surgery. J Cataract Refract Surg 2003; 29:1950-1955. Study that examines the aspect of experience of examiners on the outcome of biometry for the ultrasound and optical methods.
13. Goel S, Chua C, Butcher M, et al. Laser vs ultrasound biometry - a study of intra- and interobserver variability. Eye 2004; 18:514-518. Study that confirms the higher precision and consistency of the optical biometry method compared with ultrasound, as found in previous studies.
14. Daniel C, Tuft S, Ionides A, et al. Effect of visual acuity on biometry prediction error after cataract surgery. J Cataract Refract Surg 2003; 29:1365-1369. Ocular comorbidity apart from cataract reduces the accuracy of ultrasound axial length measurement, probably because of misalignment errors.
15. Kriechbaum K, Findl O, Kiss B, et al. Comparison of anterior chamber depth measurement methods in phakic and pseudophakic eyes. J Cataract Refract Surg 2003; 29:89-94. The IOL Master, which uses a photographic technique instead of partial coherence interferometry to measure ACD, should not be used to measure axial intraocular lens position in pseudophakic eyes, because this results in common artifacts.
16. Reddy AR, Pande MV, Finn P, et al. Comparative estimation of anterior chamber depth by ultrasonography, Orbscan II, and IOLMaster. J Cataract Refract Surg 2004; 30:1268-1271.
17. Kaye SB: Actual and intended refraction after cataract surgery. J Cataract Refract Surg 2003; 29:2189-2194. Concept of analyzing change in spherical corneal power in addition to refractive outcome to separate the two.
18. Norrby S: Using the lens haptic plane concept and thick-lens ray tracing to calculate intraocular lens power. J Cataract Refract Surg 2004; 30:1000-1005. Interesting renewal of the lens haptic plane concept with a layout of an excel spreadsheet for ray tracing calculation.
19. Kriechbaum K, Findl O, Preussner PR, et al. Determining postoperative anterior chamber depth. J Cataract Refract Surg 2003; 29:2122-2126. Study that shows how well axial intraocular lens position precisely measured in vivo and derived values out of intraocular lens constants agree.
20. Findl O, Struhal W, Dorffner G, et al. Analysis of nonlinear systems to estimate intraocular lens position after cataract surgery. J Cataract Refract Surg 2004; 30:863-866. Even though studies with negative outcome are of less interest, this study illustrated that cumbersome computation does not always result in success.
21. Hayashi K, Hayashi H: Stereopsis in bilaterally pseudophakic patients. J Cataract Refract Surg 2004; 30:1466-1470.
22. Aramberri J: Intraocular lens power calculation after corneal refractive surgery: double-K method. J Cataract Refract Surg 2003; 29:2063-2068. Simple and logical approach to the problem of K readings being used for the power calculation and for the prediction of ELP. Separating the two steps and using the (estimated) present and the historical K-values, respectively, resulted in significantly better refractive outcomes in a small series.
23. Koch DD, Wang L: Calculating IOL power in eyes that have had refractive surgery. J Cataract Refract Surg 2003; 29:2039-2042. Good short summary of the current problem of power calculation after refractive surgery and a simple approach to the problem.
24. Packer M, Brown LK, Hoffman RS, et al. Intraocular lens power calculation after incisional and thermal keratorefractive surgery. J Cataract Refract Surg 2004; 30:1430-1434. Retrospective study that uses an algorithm by Holladay that calculates the effective refractive power from the topography data.
25. Jahn CE, Jahn MA, Kreiner CF, et al. Intraocular lens with reversibly adjustable optical power: pilot study of concept and safety. J Cataract Refract Surg 2003; 29:1795-1799. Interesting concept of a novel intraocular lens that allows change of axial positioning of the optic.
26. Matthews MW, Eggleston HC, Hilmas GE: Development of a repeatedly adjustable intraocular lens. J Cataract Refract Surg 2003; 29:2204-2210. Interesting concept of a novel intraocular lens that allows change of axial positioning of the optic.