RESHAPING TORIC CORNEAS WITH ORTHOKERATOLOGY A CASE STUDY
Main Article Content
Abstract
The use of specially designed reverse geometry lenses, known as orthokeratology (ortho-K) lenses, has gained popularity recently. There are various names to this technique: corneal reshaping therapy, corneal refractive therapy, overnight corneal reshaping, corneal molding system, Vision Shaping Treatment, and many more. The advantage of applying this technique is that it results in a temporary reduction of the refractive error by flattening the central cornea with overnight wear of the specially designed lens. Ortho-K lenses are also widely used as a modality for slowing myopia progression in children. With advances in technology and lens design, high refractive errors and astigmatism are now possible to correct. This case presentation summarizes a successful fitting of toric ortho-K lenses to reshape a toric cornea with high
myopia and astigmatism.
Downloads
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Copyright of articles published in all DPG titles is retained by the author(s). The author(s) grants DPG the rights to publish the article and identify itself as the original publisher. The author grants DPG exclusive commercial rights to the article. The author grants any party the rights to use the article freely for non-commercial purposes provided that the original work is properly cited.
References
2. Fredrick DR. Myopia. BMJ. 2002;324(7347):1195–1199. http://dx.doi.org/10.1136/bmj.324.7347.1195
3. Kerns R. Research in orthokeratology. Part III: Results and observations. J Am Optom Assoc. 1976;47(12):1505–15.
4. Saviola JF. The current FDA view on overnight orthokeratology: How we got here and where we are going. Cornea. 2005;24(7):770–1. http://dx.doi.org/10.1097/01.ico.0000154234.64359.9a
5. Pan CW, Ramamurthy D, Saw SM. Worldwide prevalence and risk factors for myopia. Ophthalmic Physiol Opt. 2012;32(1):3–16. http://dx.doi.org/10.1111/j.1475-1313.2011.00884.x
6. Chen LZ. Ortho-K management of the higher myopic patient. Contact Lens Spectrum. 2021.
7. Liu G, Chen Z, Xue F, Li J, Tian M, Zhou X, et al. Effects of myopic orthokeratology on visual performance and optical quality. Eye Contact Lens. 2018;44(5):316–321. http://dx.doi.org/10.1097/ICL.0000000000000372
8. Jiang J, Lian L, Wang F, Zhou L, Zhang X, Song E. Comparison of toric and spherical orthokeratology lenses in patients with astigmatism. J Ophthalmol. 2019;2019:4275269. http://dx.doi.org/10.1155/2019/4275269
9. Maseedupally VK, Gifford P, Lum E, Naidu R, Sidawi D, Wang B, et al. Treatment zone decentration during orthokeratology on eyes with corneal toricity. Optom Vis Sci. 2016;93(9):1101–11. http://dx.doi.org/10.1097/OPX.0000000000000896
10. Chen CC, Cheung SW, Cho P. Toric orthokeratology for highly astigmatic children. Optom Vis Sci. 2012;89(6):849–55. http://dx.doi.org/10.1097/OPX.0b013e318257c20f
11. Chen C, Cheung SW, Cho P. Myopia control using toric orthokeratology (TO-SEE study). Invest Ophthalmol Vis Sci. 2013;54(10):6510–7. http://dx.doi.org/10.1167/iovs.13-12527
12. Luo M, Ma S, Liang N. Clinical efficacy of toric orthokeratology in myopic adolescent with moderate to high astigmatism. Eye Sci. 2014;29(4):8–12.
13. Ngu K, Gan C. Fitting orthokeratology successfully on a patient with astigmatism. Myopia Profile. 2020.
14. Chew SK. Toric orthokeratology effectiveness on correcting astigmatism: A narrative literature review. JOJ Opthalmol. 2018;6(5):555703. http://dx.doi.org/10.19080/JOJO.2018.07.555703
15. Gidosh N, Morgan B, Norman C. Elevate your ortho-K fitting to the next level. Contact Lens Spectrum. 2017;32:32–34,36,37.
16. Wan SC, Cho PA. Comparative study of the performance of different corneal topographers on children with respect to orthokeratology practice. Optom Vis Sci. 2005;82(5):420–7. http://dx.doi.org/10.1097/01.opx.0000162642.24885.71
17. Cho P, Lam AKC, Mountford J, Ng L. The performance of four different corneal topographers on normal human corneas and its impact on orthokeratology lens fitting. Optom Vis Sci. 2002;79(3):175–83. http://dx.doi.org/10.1097/00006324-200203000-00012
18. Goggin M. Astigmatism and periocular hemangioma. Ophthalmology. 2008;115(10):1854–5. http://dx.doi.org/10.1016/j.ophtha.2008.05.004
19. Liong SL, Mohidin N, Tan BW, Ali BM. Refractive error, visual acuity, and corneal-curvature changes in high and low myopes with orthokeratology treatment: A Malaysian study. Taiwan J Ophthalmol. 2015;5(4):164–8. http://dx.doi.org/10.1016/j.tjo.2015. 07.006
20. Alharbi A, Swarbrick HA. The effects of overnight orthokeratology lens wear on corneal thickness. Invest Ophthalmol Vis Sci. 2003;44(6):2518–23. http://dx.doi.org/10.1167/iovs.02-0680
21. Cho P, Cheung SW, Edwards MH, Fung J. An assessment of consecutively presenting orthokeratology patients in a Hong Kong based private prac-tice. Clin Exp Optom. 2003;86(5):331–8. http://dx.doi.org/10.1111/j.1444-0938.2003.tb03129.x
22. Charm J. Orthokeratology: Clinical utility and patient perspectives. Clin Optom. 2017;9:33–40. http://dx.doi.org/10.2147/OPTO.S104507
23. Baertschi M, Wyss M. Correction of high amounts of astigmatism through orthokeratology. A case report. J Optom. 2011;3(4):182–4. http://dx.doi.org/10.1016/S1888-4296(10)70027-3
24. Charm J, Cho P. High myopia-partial reduction ortho-k: A 2-year randomized study. Optom Vis Sci. 2013;90(6):530–9. http://dx.doi.org/10.1097/ OPX.0b013e318293657d