Analysis of excimer laser radiant exposure effect toward corneal ablation volume at LASIK procedure

Rima Fitria Adiati; Artha Bona Rini Rizki; Apriani Kusumawardhani; Heru Setijono; Andi Rahmadiansah

doi:10.1117/12.2243826

11 November 2016 Analysis of excimer laser radiant exposure effect toward corneal ablation volume at LASIK procedure

Rima Fitria Adiati, Artha Bona Rini Rizki, Apriani Kusumawardhani, Heru Setijono, Andi Rahmadiansah

Proceedings Volume 10150, Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016); 101500B (2016) https://doi.org/10.1117/12.2243826
Event: Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016), 2016, Bali, Indonesia

Abstract

LASIK (Laser Asissted In Situ Interlamelar Keratomilieusis) is a technique for correcting refractive disorders of the eye such as myopia and astigmatism using an excimer laser. This procedure use photoablation technique to decompose corneal tissues. Although preferred due to its efficiency, permanency, and accuracy, the inappropriate amount radiant exposure often cause side effects like under-over correction, irregular astigmatism and problems on surrounding tissues. In this study, the radiant exposure effect toward corneal ablation volume has been modelled through several processes. Data collecting results is laser data specifications with 193 nm wavelength, beam diameter of 0.065 - 0.65 cm, and fluence of 160 mJ/cm². For the medical data, the myopia-astigmatism value, cornea size, corneal ablation thickness, and flap data are taken. The first modelling step is determining the laser diameter between 0.065 - 0.65 cm with 0.45 cm increment. The energy, power, and intensity of laser determined from laser beam area. Number of pulse and total energy is calculated before the radiant exposure of laser is obtained. Next is to determine the parameters influence the ablation volume. Regression method used to create the equation, and then the spot size is substituted to the model. The validation used is statistic correlation method to both experimental data and theory. By the model created, it is expected that any potential complications can be prevented during LASIK procedures. The recommendations can give the users clearer picture to determine the appropriate amount of radiant exposure with the corneal ablation volume necessary.

Citation Download Citation

Rima Fitria Adiati, Artha Bona Rini Rizki, Apriani Kusumawardhani, Heru Setijono, and Andi Rahmadiansah "Analysis of excimer laser radiant exposure effect toward corneal ablation volume at LASIK procedure", Proc. SPIE 10150, Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016), 101500B (11 November 2016); https://doi.org/10.1117/12.2243826

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KEYWORDS

Laser ablation

LASIK

Laser vision correction

Excimer lasers

Cornea

Tissues

Data modeling

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