Abstract
(1) Background: We investigated the behavior of gas inside a lens and its influence on the lens capsule, which may cause complications by lens irradiation with a femtosecond laser cataract surgery device. (2) Methods: The crystalline lenses of 6-month-old porcine cadaver eyes were observed during laser irradiation. An intraocular endoscope in the vitreous cavity was used to measure the posterior capsule position. Optical coherence tomography measurements of the anterior chamber depth before and after the laser irradiation, as well as measurements of the equatorial perimeter of the extracted lens, were compared with those of the controls. (3) Results: Femtosecond laser-generated gas in the porcine lens was dependent on laser irradiation energy. Increases in the amount of laser irradiation energy caused the generated gas to coalesce, move backwards beyond the laser irradiation site, and expand the lens capsule and posterior capsule. (4) Conclusions: The present results suggest that laser irradiation-induced gas moves in the direction of the posterior capsule beyond the lens irradiation site and expands the lens capsule, which may be involved in the development of capsular block syndrome.
Highlights
Femtosecond laser-assisted cataract surgery (FLACS) irradiates an extremely short femtosecond pulse laser, thereby performing minimally invasive and accurate cataract surgery without causing shock or heat [1]
(4) Conclusions: The present results suggest that laser irradiation-induced gas moves in the direction of the posterior capsule beyond the lens irradiation site and expands the lens capsule, which may be involved in the development of capsular block syndrome
The present results suggested that there was inflation of the laser irradiation-induced gas in the direction of the posterior capsule beyond the lens irradiation site along with expansion of the lens capsule, which could be involved in the development of capsular block syndrome (CBS)
Summary
Femtosecond laser-assisted cataract surgery (FLACS) irradiates an extremely short femtosecond pulse laser, thereby performing minimally invasive and accurate cataract surgery without causing shock or heat [1]. By irradiating the laser as if to create perforations, we allow adjacent perforations to connect to each other We repeat this process, and perform anterior capsulotomy and lens fragmentation. There is a higher risk for laser-induced gas to increase intracapsular pressure and cause intraoperative capsular block syndrome (CBS), leading to posterior capsule rupture during FLACS as compared to CCS [1,3,4]. The behavior of the generated gas inside the lens during femtosecond laser irradiation and the effect on the lens capsule are yet to be well understood. The aim of this study was to investigate the behavior of the femtosecond laser-induced gas inside the lens and determine its influence on the lens capsule. The present results suggested that there was inflation of the laser irradiation-induced gas in the direction of the posterior capsule beyond the lens irradiation site along with expansion of the lens capsule, which could be involved in the development of CBS
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