Picosecond laser ablation of porcine sclera

Wojciech S. Góra; Eleanor M. Harvey; Baljean Dhillon; Simon H. Parson; Robert R. J. Maier; Duncan P. Hand; Jonathan D. Shephard

doi:10.1117/12.2004828

26 March 2013 Picosecond laser ablation of porcine sclera

Wojciech S. Góra, Eleanor M. Harvey, Baljean Dhillon, Simon H. Parson, Robert R. J. Maier, Duncan P. Hand, Jonathan D. Shephard

Author Affiliations +

Proceedings Volume 8567, Ophthalmic Technologies XXIII; 856726 (2013) https://doi.org/10.1117/12.2004828
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Lasers have been shown to be successful in certain medical procedures and they have been identified as potentially making a major contribution to the development of minimally invasive procedures. However, the uptake is not as widespread and there is scope for many other applications where laser devices may offer a significant advantage in comparison to the traditional surgical tools. The purpose of this research is to assess the potential of using a picosecond laser for minimally invasive laser sclerostomy. Experiments were carried out on porcine scleral samples due to the comparable properties to human tissue. Samples were prepared with a 5mm diameter trephine and were stored in lactated Ringer’s solution. After laser machining, the samples were fixed in 3% glutaraldehyde, then dried and investigated under SEM. The laser used in the experiments is an industrial picosecond TRUMPF TruMicro laser operating at a wavelength of 1030nm, pulse length of 6ps, repetition rate of 1 kHz and a focused spot diameter of 30μm. The laser beam was scanned across the samples with the use of a galvanometer scan head and various ablation patterns were investigated. Processing parameters (pulse energy, spot and line separation) which allow for the most efficient laser ablation of scleral tissue without introducing any collateral damage were investigated. The potential to create various shapes, such as linear incisions, square cavities and circular cavities was demonstrated.

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Wojciech S. Góra, Eleanor M. Harvey, Baljean Dhillon, Simon H. Parson, Robert R. J. Maier, Duncan P. Hand, and Jonathan D. Shephard "Picosecond laser ablation of porcine sclera", Proc. SPIE 8567, Ophthalmic Technologies XXIII, 856726 (26 March 2013); https://doi.org/10.1117/12.2004828

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KEYWORDS

Laser ablation

Sclera

Picosecond phenomena

Scanning electron microscopy

Pulsed laser operation

Photomicroscopy

Tissues

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