CONTACT LENS FOR ORTHOKERATOLOGY – SOLUTION FOR ENSURING VISUAL COMFORT

Gyorgy BODI, Alexandra LAZAR, Mihaela Baritz, Daniela BARBU, Angela REPANOVICI

Abstract


The cornea deformation due to the keratoconus pathology has represented a real clinical challenge for specialists in the field of ophthalmology to find the best method to eliminate, minimize or just improve as much as possible the effects of this pathology on the visual function. That is why a series of solutions have been sought over time to be able to ensure visual comfort, good and long-lasting vision for these subjects/patients, using different investigative procedures and/or different intervention methods. One of these forms of vision improvement in the case of some subjects/patients with keratoconus forms or low/medium myopia is represented by the rigid contact lens for orthokeratology. In the first and second part of this paper, the general aspects related to the construction of the contact lens for orthokeratology are presented, as well as the theoretical foundation related to the behavior of the ortho-k lens in contact with the cornea, tear film assembly. The third part of the paper presents the analysis model of this assembly and the application of the methodology for ensuring visual comfort for a sample of subjects by using the ortho-k lens in cases of low and medium myopia. The final part of the paper presents the results of these experimental studies as well as the conclusions on the efficiency of using the ortho-k lens.


Full Text:

PDF

References


Swarbrick, H. Orthokeratology review and update, Clin Exp Optom, 89(3), pp. 124–143, 2006.

Mountford, J., Ruston, D., Trusit D. Orthokeratology-Principles and Practice, Butterworth-Heinemann Medical, 2004.

Hoy, L. Ortho-K: Corneal Reshaping, https://www.innovativeeyecare.com.au/.

Wah, H., Taskin, H. Orthokeratology, https://www.infocusoptical.com.au/.

Wang, C.M. Analysis and design of plated structures dynamics, Woodhead Publishing series in civil and structural engineering, 2, pp. 275-292, 2007.

Reddy, J.N. A simple higher-order theory for laminated composite plates, Trans. ASME, Journal of Applied Mechanics, 51, pp.745–752, 1984.

Bodi, G., Baritz, M.I., Barbu, D.M, Druga, C., Correlation of corneal behavior under the action of orthokeratological contact lenses with tension states in thin curved plates, 11th International Conference on Information Science, Brasov, 2021.

DIANA Finite Elements Analysis. User’s Manual, https://dianafea.com/manuals/d101/Theory/.

Guarnieri, F. Corneal Biomechanics and Refractive Surgery, Springer, New York, ISBN 978-1-4939-1767-9, 2015.

Schanzlin, D., Robin, J. Corneal Topography. Measuring and Modifying the Cornea, Springer, New York, 1992.

Guarnieri, F., Cardona, A., Video-keratoscope - based computer simulation of the refractive surgery. IEEE Trans. Biomed. Eng. Report to CONICET, 1998.

Holden, B.A., Fricke T.R., Wilson, D.A., et al. Global prevalence of myopia and high myopia and temporal trends from 2000 through 2050. Ophthalmology 123(5), pp. 1036-1042, 2016.

Si, J. K., Tang, K., Bi, H. S., Guo, D. D., Guo, J. G., Wang, X. R. Orthokeratology for myopia control: a meta-analysis, Optometry and Vision Science, 92(3), pp. 252-257, 2015.

Kandel, H., Pesedovs K., Watson, S., Measurement of quality of life in keratoconus, Cornea, 39(3), pp. 386-393, 2020.

Mountford, J., Ruston, D., Trusit, D. Orthokeratology Principles and Practice, Butterworth-Heinenmann Medical, 4, pp. 69-94, 2004.

Lee, S., Jung, G., Lee, H.K. Comparison of Contact Lens Corrected Quality of Vision and Life of Keratoconus and Myopic Patients, Korean Journal of Ophthalmology: KJO, 2017.

Draghici, A., Baban, C. F., Ivascu, L. V., Sarca, I. (2015). Key success factors for university–industry collaboration in open innovation, Proceedings of the ICERI2015, ISBN: 978-84-608-2657-6, 7357-7365, IATED, 2015.

Paschek, D., Rennung, F., Trusculescu, A., Draghici, A., Corporate development with agile business process modeling as a key success factor, Procedia Computer Science, 100, 1168-1175, 2016.


Refbacks

  • There are currently no refbacks.


JOURNAL INDEXED IN :