Computer analysis of corneal aberrations in relation to the tasks of laser surgery of the anterior segment of the eye
Year: 2019, volume 15 Issue: №2 Pages: 425-428
Heading: Ophtalmology Article type: Original article
Authors: Bakutkin V.V., Bakutkin I.V., Zelenov V.A., Nugaeva N.R.
Organization: International Consulting, Audit and Education Academy, Saratov State Medical University
Heading: Ophtalmology Article type: Original article
Authors: Bakutkin V.V., Bakutkin I.V., Zelenov V.A., Nugaeva N.R.
Organization: International Consulting, Audit and Education Academy, Saratov State Medical University
Summary:
Purpose: development of a method for computer analysis of corneal aberrations as applied to the tasks of laser surgery of the anterior segment of the eye. Material and Methods. As a result of mathematical modeling, an algorithm has been developed that is implemented as a computer program for selecting individual parameters of laser radiation depending on the optical characteristics of the cornea. Results. For astigmatism, it has been proposed to consider the topographic zones of the optical center of the cornea, 3.5 mm in diameter, and peripheral meridional zones. Aberrations at the periphery of the cornea increase by 10 %. At 1 and 2 stages of keratoconus, the rate of aberrations rises 2–3 times. In the third stage of keratoconus, in some cases keratometry and keratotopography is technically impossible. With pterygium 2 and 3 degrees, laser surgery in the peripheral zone of the cornea is impossible. Conclusion. Improving the efciency of laser operations is provided primarily by optimizing the impact parameters on the tissues of the anterior segment of the eye. The data on the types of corneal aberrations for various diseases, which indicate the need to change the parameters of laser exposure. The developed diagnostic algorithms are implemented as a computer program and allow you to optimize the parameters of laser irradiation of eye tissue.
Bibliography:
1 Egorova GB, Borodina NV, Bubnova IA. Aberrations of the human eye, methods of their measurement and correction (literature review). Russian medical journal «Clinical ophthalmology» 2004; (4): 174–8
2 Kornyushina TA, Rozenblyum YuZ. Aberrations of the optical system of the human eye and their clinical signifcance. Bulletin of optometry 2002; (3):13–20
3 Cherezova TYu. Formation of spatial distributions and correction of aberrations of light felds by methods of adaptive optics: DSc abstract. Moscow, 2008; 48 p.
4 Koh S, Maeda N, Kuroda T, et al. Efect of tear flm break-up on higher-order aberrations measured withwavefront sensor. J Ophthalmol 2002; (134): 115–7.
5 Arestova NN. Development of a system of YAG-laser optical-reconstructive surgery of the anterior segment in children: DSc diss. Moscow, 2009; 334 p.
6 Maeda N, Fujikado T, Kuroda T, et al. Wavefront aberrations measured with Hartmann — Shack sensor in patients with keratoconus. Ophthalmology 2002; 109 (11): 1996–2003
7 Thibos LN. Principles of Hartmann — Shack Aberrometry. J Refract Surg 2000; 16 (5): 563–5
8 Marsack J, Milner T, Rylander G, et al. Applying wavefront sensors and corneal topography to keratoconus. Biomed Sci Instrum 2002; (38): 471–6
9 Aliyev AA. Features of corneal aberrations in pterygium: PhD abstract. Moscow, 2008; 26 p.
10 Karamyan AA, Sukhanova EV. Study of the efect of pterygium on the aberration of the optical system of the eye. Message 1: The dependence of induced aberrations from the stage of pterygium. Journal of ophthalmology 2008; (2): 3–6.
| Attachment | Size |
|---|---|
| 2019_02-1_425-428.pdf | 274.12 KB |
Русский
English