CAJ | 학술논문

1990年代,一种新型的超短超快激光—飞秒激光(femtosecond laser,FS)出现并开始应用于各个领域。飞秒激光是一种以超短脉冲形式运转的近红外光。1飞秒等于千万亿分之一秒(1×10-15 s )。如此快的脉冲激光很少将热量和振动传导至周围组织,从而较少引起周围组织的损伤。随着技术的发展,开始出现应用飞秒激光制作角膜板层瓣,即飞秒激光辅助下的准分子激光角膜原位磨镶术,后来,其应用于飞秒激光辅助下的角膜移植术、角膜基质环植入术。飞秒激光进行角膜移植手术,主要是应用飞秒激光可以制作角膜植片和植床,准确切割各层病变角膜组织,即使在轻度的角膜斑翳和角膜水肿时,也可以达到部分切割的目的。
1990년대,일충신형적초단초쾌격광—비초격광(femtosecond laser,FS)출현병개시응용우각개영역。비초격광시일충이초단맥충형식운전적근홍외광。1비초등우천만억분지일초(1×10-15 s )。여차쾌적맥충격광흔소장열량화진동전도지주위조직,종이교소인기주위조직적손상。수착기술적발전,개시출현응용비초격광제작각막판층판,즉비초격광보조하적준분자격광각막원위마양술,후래,기응용우비초격광보조하적각막이식술、각막기질배식입술。비초격광진행각막이식수술,주요시응용비초격광가이제작각막식편화식상,준학절할각층병변각막조직,즉사재경도적각막반예화각막수종시,야가이체도부분절할적목적。
With the rapid development over the past two decades, femtosecond ( 10-15 s ) lasers ( FS ) has become a new application in ophthalmic surgery. As laser power is defined as energy delivered per unit time, decreasing the pulse duration to femtosecond level ( 100fs ) not only increases the power delivered but also decreases the fluence threshold for laser induced optical breakdown. In ablating tissue, FS has an edge over nanosecond lasers as there is minimal collateral damage from shock waves and heat conduction during surgical ablation. Thus, application of FS has been widely spread, from flap creation for laser-assisted in situ keratomileusis ( LASIK) surgery, cutting of donor and recipient corneas in keratoplasty, creation of pockets for intracorneal ring implantation. FS applied in keratoplasty is mainly used in making graft and recipient bed, and can exactly cut different tissue of keratopathy. FS can also cut partial tissue of cornea, even if it is under the moderate corneal macula and corneal edema condition.