ESTIMATION OF CORNEA EFFECTIVE ABSORPTION COEFFICIENT AT 213 NM FROM ABLATION MEASUREMENTS
Abstract
It is shown experimentally that a cornea represents a 213 nm UV inhomogeneous material both at depth and around a surface in relation to UV effective absorption coefficient and local laser depth ablation rate, which should be taken into account for a more exact planning of a profile of removed cornea collagen material during eye vision correction.
About the Authors
S. A. BatishcheBelarus
S. B. Bushuk
Belarus
A. A. Kouzmouk
Belarus
A. V. Savitch
Belarus
H. A. Tatur
Belarus
G. Grabner
Austria
W. Kautek
Austria
References
1. UV Solid State Laser (213 nm) Photo-Refractive Keratectomy / Q. Ren [et al.] / Ophthalmology. – 1994. – Vol. 101. – P. 883–889.
2. Solid state lasers for ocular surgery: preclinical study / R. Cubeddu [et al.] / Proc. SPIE. – 1994. – Vol. 2079. – P. 177–182.
3. Fisher, B. T. /Measurement of small-signal absorption coefficient and absorption cross section of collagen for 193- nm excimer laser light and the role of collagen in tissue ablation / B. T. Fisher, D. W. Hahn / Appl. Opt. – 2004. – Vol. 43. – P. 5443–5451.
4. Pettit, G. H. Corneal-tissue absorption coefficients for 193- and 213-nm ultraviolet radiation / G. H. Pettit, M. N. Ediger / Appl. Opt. – 1996. – Vol. 35. – P. 3386–3391.
5. Mechanistic comparison of pulse laser induced phase separation of particulates from cellulose paper at 213 nm and 532 nm / S. Arif [et al.] / Appl. Phys. A. – 2013. – Vol. 110. – P. 501–509.
6. Dmitriev, А. K. Mechanism of laser ablation of biotissues / А. K. Dmitriev, N. P. Furzikov // Ivz. AN SSSR. – 1989. – No. 53. – P. 1105–1110.
7. Lantukh, V. V. Use of UV radiation of eximer lasers in eye microsurgery / V. V. Lantukh // Opt. Spectrosc. – 1987. – Vol. 63, iss. 5. – P. 1132–1138.
8. Krüger, J. Ultrashort Pulse Laser Interaction with Dielectrics and Polymers / J. Krüger, W. Kautek // Adv. Polym. Sci. – 2004. – Vol. 168. – P. 247–289.