Corneal ablation with new 193 nm solid-state laser

Nakagawa, Tomoya; Maeda, Naoyuki; Çekıç, Osman; Fujikado, Takashi; Tano, Yasuo; Murakami, Atsutoshi; Yoshimura, Masashi; Mori, Yusuke; Sasaki, T.; Kitano, Hiroshi; Owa, Soichi

doi:10.1016/j.jcrs.2008.02.034

Cited by 3 publications

(2 citation statements)

References 26 publications

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“…Ablation experiments were conducted using various polymer substrates of hydrophobic acrylic IOLs and PMMA IOLs [18]. Smoother ablations of PMMA plates and porcine corneas were obtained by the laser [19].…”

Section: Introductionmentioning

confidence: 99%

Wettability and Surface Morphology Investigation of RGP Eye Contact Lens Irradiated by 193 nm Excimer Laser

Ariyafar¹,

Saffar²,

Tajalli³

et al. 2015

OALib

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In this work, Rigid gas permeable (RGP) contact lenses based on Fluoro Silicone Acrylate, were irradiated by using 193 nm ArFexcimer laser, at 1 Hz pulse repetition rate with 75 mJ/pulse energy to improve surface wettability. We investigated the morphology of the ablated area by imaging the surface modification with Atomic force microscopy (AFM) with roughness analysis and Scanning electron microscopy (SEM). Characterization techniques were performed too via contact angle measurement in order to determine the surface wettability and Fourier transform infra-red spectroscopy (FTIR). The morphological appearance of samples reveals the effect of a photochemical and photothermal ablation mechanism. The laser irradiation without changing the chemical bonds has modified the lens surface properties and increased the surface hydrophilicity. Morphological surface changes with laser exposure and the water contact angle decreases as the surface of the fluorosilicone acrylate material is modified.

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Section: Introductionmentioning

confidence: 99%

Wettability and Surface Morphology Investigation of RGP Eye Contact Lens Irradiated by 193 nm Excimer Laser

Ariyafar¹,

Saffar²,

Tajalli³

et al. 2015

OALib

View full text Add to dashboard Cite

show abstract

“…Some laser systems provide repetition rates of 1000 Hz or higher. [4][5][6][7] Increasing the repetition rate might cause significant alterations in the laser ablation effect (ablation depth per pulse) as a result of photochemical 8 or photothermal changes that occur during the ablation process. 9,10 The initial process of UV photoablation can be considered a photochemical process; however, because the water within the cornea starts to absorb the UV laser radiation, there is also a significant thermal component to the ablation process.…”

mentioning

confidence: 99%