Revista Mexicana de Oftalmología

Register      Login

VOLUME 95 , ISSUE 6E ( November-December, 2021 ) > List of Articles

Original Article

Corneal power after photoablative surgery for intraocular lens calculation using Pentacam-AXL

Keywords : Corneal power, Photoablative surgery, Intraocular lens

Citation Information : Corneal power after photoablative surgery for intraocular lens calculation using Pentacam-AXL. 2021; 95 (6E):237-243.

DOI: 10.24875/RMOE.M21000195

License: CC BY-NC-ND 4.0

Published Online: 05-11-2021

Copyright Statement:  Copyright © 2021 Sociedad Mexicana de Oftalmología. Published by Permanyer


Abstract

Objective: To compare the intraocular lens power calculated with the total refractive corneal power (TRCP), the effective keratometric readings (EKR) provided by the Holladay Report of the Pentacam-AXL topographer and the true corneal power (True-K) used by the Barret True-K formula incorporated in the equipment, with the values obtained by the clinical history method (CHM) in patients with previous photoablative surgery for myopia correction. Method: A cross-sectional study was carried out in 99 eyes of 52 myopic patients after photoablative surgery in the Refractive Surgery Department of the Ramón Pando Ferrer Institute from November 2018 to November 2019. Demographic, refractive and biometric characteristics were evaluated, including corneal powers obtained by the Pentacam-AXL. We compared corneal power and the intraocular lens power calculation. Results: Mean age was 25.71 ± 4.46 years, there was a female predominance (67.3%) and the spherical equivalent was -0.06 ± 0.34 diopters. There were only significant differences in mean keratometry (p = 0.02) and intraocular lens power calculated using keratometry (p < 0.01) compared with that calculated using the MRM; not so with EKR, TRCP and True-K. Conclusions: The effective keratometric readings provided by the Holladay Report module of the Pentacam, the total corneal refractive power and the true corneal power used by the Barret True-K formula, do not differ from the corneal power obtained by the MRM in eyes with previous photoablative surgery for myopia correction, so they can be used for intraocular lens calculation.


PDF Share
  1. Galvis V, Tello A, Jaramillo LC, Castillo AM, Pareja LA, Camacho PA. Cambios corneales producidos por la cirugía refractiva con excimer láser: revisión de tema. MÉD UIS. 2017;30:99-105.
  2. Savini G, Hoffer KJ. Intraocular lens power calculation in eyes with previous corneal refractive surgery. Eye Vis (Lond). 2018;5:18-27.
  3. Cárdenas T. Poder corneal postcirugía fotoablativa para el cálculo del lente intraocular. [Tesis de Doctorado.] La Habana: Universidad de Ciencias Médicas de La Habana; 2015.
  4. Cárdenas T, Guerra M, Hernández I, Cruz D, Montero E, Hernández R. Principios para el cálculo de la lente intraocular tras cirugía refractiva corneal. Rev Cub Oftalmol. 2016;29(1).
  5. Cho K, Lim DH, Yang C, Chung ES, Chung TY. Comparison of intraocular lens power calculation methods following myopic laser refractive surgery: new options using a rotating Scheimpflug camera. J Ophthalmol. 2018;32:497-505.
  6. Kang BS, Han JM, Oh JY, Kim MK, Wee WR. Intraocular lens power calculation after refractive surgery: a comparative analysis of accuracy and predictability. Korean J Ophthalmol. 2017;31:479-88.
  7. Cho K, Lim DH, Yoo YS, Chung TY. New method for intraocular lens power calculation using a rotating Scheimpflug camera in eyes with corneal refractive surgery. BMC Ophthalmol. 2020;10:8992.
  8. Pereira JMM, Neves A, Alfaiate P, Santos M, Aragao H, Sousa JC. Lenstar® LS 900 vs Pentacam®-AXL: comparative study of ocular biometric measurements and intraocular lens power calculation. Eur J Ophthalmol. 2018;28:645-51.
  9. Haddad JS, Barnwell E, Rocha KM, Ambrosio R Jr, Waring Iv GO. Comparison of biometry measurements using standard partial coherence interferometry versus new Scheimpflug tomography with integrated axial length capability. J Clin Ophthalmol. 2020;14:353-8.
  10. Shajari M, Sonntag R, Ramsauer M, Kreutzer T, Vounotrypidis E, Kohnen T, et al. Evaluation of total corneal power measurements with a new optical biometer. J Cataract Refract Surg. 2020;46:675-81.
  11. Abulafia A, Hill WE, Koch DD, Wang L, Barrett GD. Accuracy of the Barrett True-K formula for intraocular lens power prediction after laser in situ keratomileusis or photorefractive keratectomy for myopia. J Cataract Refract Surg. 2016;42:363-9.
  12. Zhu W, Zhang FJ, Li Y, Song YZ. Stability of the Barrett True-K formula for intraocular lens power calculation after SMILE in Chinese myopic eyes. Int J Ophthalmol. 2020;13:560-6.
  13. Karunaratne N. Comparison of the Pentacam equivalent keratometry reading and IOL Master keratometry measurement in intraocular power calculations. Clin Exp Ophthalmol. 2013;41:825-34.
  14. Cuan Y, Pérez E, Montero E, Santiesteban I, Ortega L, Cárdenas T. Utilidad del topógrafo Pentacam para medir el poder corneal después de cirugía refractiva con excímer láser. Rev Cub Oftalmol. 2010;23 (Supl 1):513-21.
  15. Cárdenas T, Guerra M, Pérez EC, Cuan Y, Hernández I. Cirugía refractiva láser previa y cálculo del lente intraocular en miopes. Rev Cub Oftalmol. 2017;30(2).
  16. Cangrejo Forero EI. Resultados del cálculo de lente en operados de catarata y cirugía refractiva: fórmula Barrett True K. [Tesis.] La Habana: Universidad de Ciencias Médicas de La Habana; 2020.
  17. Pérez Rangel Y. Cálculo del lente intraocular en pacientes con cirugía refractiva láser previa. [Tesis.] La Habana: Universidad de Ciencias Médicas de La Habana; 2019.
  18. Di Ruggiero M. Declaración de Helsinki, principios y valores bioéticos en juego en la investigación médica con seres humanos. Revista Colombiana de Bioética. 2011;6:125-44
  19. Rey DV, Moreno Montoya J. Resultado visual a los 3 meses de cirugía LASEK. Rev Mex Oftalm. 2017;91:247-53.
  20. Cabrera Martínez A, Cabrera Martínez JA, Tirado Martínez OM. Resultados refractivos en pacientes operados por LASIK versus LASEK con mitomicina C. Rev Cub Oftalmol. 2009;36(7).
  21. Rojas Álvarez E, González Sotero J. LASIK vs. LASEK desde la perspectiva morfométrica corneal in vivo. Rev Mex Oftalm. 2013;87:145-57.
  22. Sierra PB, Hardten DC. LASIK. En: Yanoff M, Duker JS, editores. Oftalmología. 5.a ed. Barcelona: Elsevier; 2019. p. 95-105.
  23. Kuo I, Lee B, Wang J. Outcomes of refractive surgery consultations at an academic center: characteristics associated with proceeding (or not proceeding) with surgery. J Ophthalmol. 2020;2020:4354085.
  24. Cumberland PM, Chianca A, Rahi JS. Laser refractive surgery in the UK Biobank study: frequency, distribution by sociodemographic factors, and general health, happiness, and social participation outcomes. J Cataract Refract Surg. 2015;41:2466-7.
  25. Hashemi H, Khabazkhoob M, Pakzad R, Yekta A, Nojomi M, Nabovati P. The characteristics of excimer laser refractive surgery candidates. Eyes Contact Lens. 2018;44 (Suppl 1):S158-62.
  26. Cárdenas T, Machado E, Guerra M. Cirugía refractiva corneal. En: Ríos M, Fernández L, Hernández JR, Ramos M, editores. Oftalmología. Diagnóstico y tratamiento. La Habana: Ciencias Médicas; 2018. p. 89-93.
  27. Cárdenas T, Ravelo W, Capote A, Pérez EC, Cuan Y, Hernández I. Poder corneal postcirugía fotoablativa en miopes. Sistema Scheimpflug topógrafo Pentacam vs método de Maloney. Rev Cub Oftalmol. 2014;27(1).
  28. Pérez EC, Cárdenas T, Hormigó I, Alarcón E, Trujillo K, Santiesteban I. Correlación de los valores queratométricos del Pentacam y el método de Maloney. Rev Cub Oftalmol. 2016;29(3).
  29. Viteri E. Uso del topógrafo Pentacam para calcular el poder de la LIO. High Lights of Ohthalmology. 2008;36(3).
  30. Savini G, Barboni P, Profazio V, Zanini M, Hoffer KJ. Corneal power measurements with the topographer Pentacam Scheimpflug camera after myopic excimer laser surgery. J Cataract Refract Surg. 2008; 34:809-13.
  31. Jain R, Dilraj G, Grewal SPS. Repeatability of corneal parameters with topographer Pentacam after laser in situ keratomileusis. Indian J. Ophthalmol. 2007;55:341-7.
  32. Wang L, Spektor T, de Souza RG, Koch DD. Evaluation of total keratometry and its accuracy for intraocular lens power calculation in eyes after corneal refractive surgery. J Cataract Refract Surg. 2019;45:1416-21.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.