Intraocular Lens Power Calculation After Myopic and Hyperopic Laser Vision Correction Using Optical Coherence Tomography

Overview

Journal Saudi J Ophthalmol

Specialty Ophthalmology

Date 2013 Aug 21

PMID 23960964

Citations 3

Authors

Maolong Tang

Li Wang

Douglas D Koch

Yan Li

David Huang

Affiliations

Soon will be listed here.

Abstract

Purpose: To use optical coherence tomography (OCT) to measure corneal power and calculate intraocular lens (IOL) power in cataract surgeries after myopic and hyperopic laser vision correction (LVC).

Methods: Patients with previous LVC were enrolled in this prospective study at two centers (Doheny Eye Institute, Los Angeles, CA, USA and Cullen Eye Institute, Houston, TX, USA). Corneal power was measured with a Fourier-domain OCT system. The intravisit repeatability of OCT corneal power measurement was evaluated by the pooled standard deviation of repeat scans. Axial length, anterior chamber depth, and automated keratometry were measured with the IOLMaster. An OCT-based IOL formula was developed. The mean absolute error (MAE) of refractive prediction for OCT-based IOL formula was calculated. The results were compared with the MAE for Haigis-L formula.

Results: A total of 31 eyes of 24 subjects who had uncomplicated cataract surgery with monofocal IOL implantation were enrolled in the two sites. Twenty-two eyes of 16 subjects had previous myopic LVC that ranged from -12.46 D to -0.88 D. Nine eyes of 8 subjects had previous hyperopic LVC that ranged from 0.66 D to 5.52 D. The intravisit repeatability of OCT corneal power measurement was 0.24 D. For the myopic LVC group, the OCT formula had a MAE of 0.57 D compared to an MAE of 0.73 D for the Haigis-L formula (p = 0.19). For the hyperopic LVC group, the MAE for OCT and Haigis-L formula was 0.26 D and 0.54 D, respectively (p > 0.05).

Conclusions: Corneal power can be precisely measured with OCT. The predictive accuracy of OCT-based IOL power calculation is equal to current standards for post-LVC eyes.

Citing Articles

Retrospective comparative analysis of intraocular lens calculation formulas after hyperopic refractive surgery.

Francone A, Lemanski N, Charles M, Borboli-Gerogiannis S, Chen S, Robert M PLoS One. 2019; 14(11):e0224981.

PMID: 31697752 PMC: 6837514. DOI: 10.1371/journal.pone.0224981.

Optical coherence tomography-based corneal power measurement and intraocular lens power calculation following laser vision correction (an American Ophthalmological Society thesis).

Huang D, Tang M, Wang L, Zhang X, Armour R, Gattey D Trans Am Ophthalmol Soc. 2013; 111:34-45.

PMID: 24167323 PMC: 3797831.

Cataract update.

Al-Rajhi A Saudi J Ophthalmol. 2013; 26(1):1-2.

PMID: 23960960 PMC: 3729653. DOI: 10.1016/j.sjopt.2012.01.001.

References

Tang M, Chen A, Li Y, Huang D . Corneal power measurement with Fourier-domain optical coherence tomography. J Cataract Refract Surg. 2010; 36(12):2115-22. PMC: 3005697. DOI: 10.1016/j.jcrs.2010.07.018. View

Klein B, Klein R, Lee K, Gangnon R . Incidence of age-related cataract over a 15-year interval the Beaver Dam Eye Study. Ophthalmology. 2008; 115(3):477-82. DOI: 10.1016/j.ophtha.2007.11.024. View

Savini G, Barboni P, Zanini M . Correlation between attempted correction and keratometric refractive index of the cornea after myopic excimer laser surgery. J Refract Surg. 2007; 23(5):461-6. DOI: 10.3928/1081-597X-20070501-07. View

Munnerlyn C, Koons S, Marshall J . Photorefractive keratectomy: a technique for laser refractive surgery. J Cataract Refract Surg. 1988; 14(1):46-52. DOI: 10.1016/s0886-3350(88)80063-4. View

Kim S, Byun Y, Kim E, Kim T . Central corneal thickness measurements in unoperated eyes and eyes after PRK for myopia using Pentacam, Orbscan II, and ultrasonic pachymetry. J Refract Surg. 2007; 23(9):888-94. DOI: 10.3928/1081-597X-20071101-04. View

Khurana R, Li Y, Tang M, Lai M, Huang D . High-speed optical coherence tomography of corneal opacities. Ophthalmology. 2007; 114(7):1278-85. DOI: 10.1016/j.ophtha.2006.10.033. View

Zeh W, Koch D . Comparison of contact lens overrefraction and standard keratometry for measuring corneal curvature in eyes with lenticular opacity. J Cataract Refract Surg. 1999; 25(7):898-903. DOI: 10.1016/s0886-3350(99)00088-7. View

Haigis W . Intraocular lens calculation after refractive surgery for myopia: Haigis-L formula. J Cataract Refract Surg. 2008; 34(10):1658-63. DOI: 10.1016/j.jcrs.2008.06.029. View

Mandell R . Corneal power correction factor for photorefractive keratectomy. J Refract Corneal Surg. 1994; 10(2):125-8. View

10.

Hamilton D, Hardten D . Cataract surgery in patients with prior refractive surgery. Curr Opin Ophthalmol. 2003; 14(1):44-53. DOI: 10.1097/00055735-200302000-00008. View

11.

Sonego-Krone S, Lopez-Moreno G, Beaujon-Balbi O, Arce C, Schor P, Campos M . A direct method to measure the power of the central cornea after myopic laser in situ keratomileusis. Arch Ophthalmol. 2004; 122(2):159-66. DOI: 10.1001/archopht.122.2.159. View

12.

Koch D, Foulks G, Moran C, Wakil J . The Corneal EyeSys System: accuracy analysis and reproducibility of first-generation prototype. Refract Corneal Surg. 1989; 5(6):424-9. View

13.

Borasio E, Stevens J, Smith G . Estimation of true corneal power after keratorefractive surgery in eyes requiring cataract surgery: BESSt formula. J Cataract Refract Surg. 2006; 32(12):2004-14. DOI: 10.1016/j.jcrs.2006.08.037. View

14.

Speicher L, Gottinger W . Intraocular lens power calculation after decentered photorefractive keratectomy. J Cataract Refract Surg. 1999; 25(1):140-3. DOI: 10.1016/s0886-3350(99)80024-8. View

15.

Sanders D, RETZLAFF J, Kraff M, Gimbel H, Raanan M . Comparison of the SRK/T formula and other theoretical and regression formulas. J Cataract Refract Surg. 1990; 16(3):341-6. DOI: 10.1016/s0886-3350(13)80706-7. View

16.

Latkany R, Chokshi A, Speaker M, Abramson J, Soloway B, Yu G . Intraocular lens calculations after refractive surgery. J Cataract Refract Surg. 2005; 31(3):562-70. DOI: 10.1016/j.jcrs.2004.06.053. View

17.

Wang L, Booth M, Koch D . Comparison of intraocular lens power calculation methods in eyes that have undergone LASIK. Ophthalmology. 2004; 111(10):1825-31. DOI: 10.1016/j.ophtha.2004.04.022. View

18.

Li Y, Tang M, Zhang X, Salaroli C, Ramos J, Huang D . Pachymetric mapping with Fourier-domain optical coherence tomography. J Cataract Refract Surg. 2010; 36(5):826-31. PMC: 2872166. DOI: 10.1016/j.jcrs.2009.11.016. View

19.

Kalski R, Danjoux J, Fraenkel G, Lawless M, Rogers C . Intraocular lens power calculation for cataract surgery after photorefractive keratectomy for high myopia. J Refract Surg. 1997; 13(4):362-6. DOI: 10.3928/1081-597X-19970701-12. View

20.

Savini G, Hoffer K, Carbonelli M, Barboni P . Intraocular lens power calculation after myopic excimer laser surgery: clinical comparison of published methods. J Cataract Refract Surg. 2010; 36(9):1455-65. DOI: 10.1016/j.jcrs.2010.02.029. View