Skip to Main content Skip to Navigation
Journal articles

Wavelength Optimization in Femtosecond Laser Corneal Surgery

Abstract : PURPOSE. To evaluate the influence of wavelength on penetration depth and quality of femtosecond laser corneal incisions in view of optimizing procedures in corneal surgery assisted by ultrashort pulse lasers. METHODS. We performed penetrating and lamellar incisions on eye bank corneas using several ultrashort pulse laser sources. Several wavelengths within the near-infrared and shortwaveinfrared wavelength range were used and the pulse energy was varied. The corneas were subsequently analyzed using light microscopy as well as transmission and scanning electron microscopy. RESULTS. We found higher penetration depths and improved incision quality when using wavelengths close to k ¼ 1650 nm rather than the wavelength of k ¼ 1030 nm typical in current clinical systems. Optical micrographs show an improvement of the penetration depth by a factor of 2 to 3 while maintaining a good incision quality when using the longer wavelength. These results were confirmed with micrographs obtained with transmission and scanning electron microscopy. CONCLUSIONS. A wavelength change from the standard 1030 nm to 1650 nm in corneal surgery assisted by ultrashort pulse laser considerably reduces light scattering within the tissue. This results in a better preservation of the laser beam quality in the volume of the tissue, particularly when working at depths required for deep lamellar or penetrating keratoplasty. Using this wavelength yields improved penetration depths into the tissue; it permits use of lower energies for any given depth and thus reduces unwanted side effects as thermal effects.
Complete list of metadata
Contributor : Karsten Plamann Connect in order to contact the contributor
Submitted on : Tuesday, June 23, 2015 - 10:27:11 AM
Last modification on : Wednesday, May 11, 2022 - 3:22:04 PM




Caroline Crotti, Florent Deloison, Fatima Alahyane, Florent Aptel, Laura Kowalczuk, et al.. Wavelength Optimization in Femtosecond Laser Corneal Surgery. Investigative Ophthalmology & Visual Science, Association for Research in Vision and Ophthalmology, 2013, 2013 (54), pp.3340-3349. ⟨10.1167/iovs.12-10694⟩. ⟨hal-01166752⟩



Record views