Quantitative assessment of corneal elasticity distribution after FS‐LASIK using optical coherence elastography

Abstract

Quantifying corneal elasticity after femtosecond laser‐assisted in situ keratomileusis (FS‐LASIK) procedure plays an important role in improving surgical safety and quality, since some latent complications may occur ascribing to changes in postoperative corneal biomechanics. Nevertheless, it is suggested that current research has been severely constrained due to the lack of an accurate quantification method to obtain postoperative corneal elasticity distribution. In this paper, an acoustic radiation force optical coherence elastography system combined with the improved phase velocity algorithm was utilized to realize elasticity distribution images of the in vivo rabbit cornea after FS‐LASIK under various intraocular pressure levels. As a result, elasticity variations within and between the regions of interest could be identified precisely. This is the first time that elasticity imaging of in vivo cornea after FS‐LASIK surgery was demonstrated, and the results suggested that this technology may hold promise in further exploring corneal biomechanical properties after refractive surgery.

Effect of Cyclotorsion Compensation in Small Incision Lenticule Extraction Surgery for the Correction of Myopic Astigmatism: A Systematic Review and Meta-Analysis

“…Astigmatism, arising from irregular corneal or lens shapes, significantly affects the visual health of the global population. With recent advancements in refractive surgery technology, it has become a pivotal option for addressing astigmatism [ 1 ]. Since its inaugural report in 2011, small incision lenticule extraction (SMILE) utilizing the VisuMax femtosecond laser (Carl Zeiss Meditec, Germany) has transformed into a well-established surgical procedure for correcting myopia [ 2 – 4 ].…”