Effect of femtosecond and microkeratome flaps creation on the cornea biomechanics during laser in situ keratomileusis: one year follow-up  被引量:8

Effect of femtosecond and microkeratome flaps creation on the cornea biomechanics during laser in situ keratomileusis: one year follow-up

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作  者:Qian Sun Zheng-Zheng Deng Yue-Hua Zhou Jing Zhang Xiao-Yan Peng 

机构地区:[1]Ophthalmic Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, Beijing 100730, China [2]Mingren Hospital, Handan 05000, Hebei Province, China

出  处:《International Journal of Ophthalmology(English edition)》2016年第10期1409-1414,共6页国际眼科杂志(英文版)

摘  要:AIM: To compare the corneal biomechanical outcomes at one year after laser in situ keratomileusis(LASIK) with the flaps created by Ziemer and Moria M2 microkeratome with 110 head and -20 blade.METHODS: Totally 100 eyes of 50 consecutive patients were enrolled in this prospective study and divided into two groups for corneal flaps created by Ziemer Femto LDV and Moria M2 microkeratome with 110 head and -20 blade.Corneal biomechanical properties including cornea resistance factor(CRF) and cornea hysteresis(CH) were measured before and 1,3,6,12 mo after surgery by ocular response analyzer.Central cornea thickness and corneal flap thickness were measured by optical coherence tomography.RESULTS: The ablation depth(P=0.693),residual corneal thickness(P=0.453),and postoperative corneal curvature(P=0.264) were not significant different between Ziemer group and Moria 110-20 group after surgery.The residual stromal bed thickness,corneal flap thickness,CH and CRF at 12 mo after surgery were significant different between Ziemer group and Moria 110-20 group(P〈0.01); Ziemer group gained better corneal biomechanical results.The CRF and CH increased gradually from 1 to12 mo after surgery in Ziemer group,increased from 1 to 6 mo but decreased from 6 to 12 mo in Moria 110-20 group.Both CRF and CH at one year after surgery increased with the increasing of residual cornea thickness; pre-LASIK CRF,CRF also increased with residual stromal bed thickness,while CH decreased with the increasing of pre-LASIK intraocular pressure and cornea flap thickness(P〈0.01).CONCLUSION: In one year follow-up,femtosecond laser can provide better cornea flaps with stable cornea biomechanics than mechanical microkeratome.AIM: To compare the corneal biomechanical outcomes at one year after laser in situ keratomileusis(LASIK) with the flaps created by Ziemer and Moria M2 microkeratome with 110 head and -20 blade.METHODS: Totally 100 eyes of 50 consecutive patients were enrolled in this prospective study and divided into two groups for corneal flaps created by Ziemer Femto LDV and Moria M2 microkeratome with 110 head and -20 blade.Corneal biomechanical properties including cornea resistance factor(CRF) and cornea hysteresis(CH) were measured before and 1,3,6,12 mo after surgery by ocular response analyzer.Central cornea thickness and corneal flap thickness were measured by optical coherence tomography.RESULTS: The ablation depth(P=0.693),residual corneal thickness(P=0.453),and postoperative corneal curvature(P=0.264) were not significant different between Ziemer group and Moria 110-20 group after surgery.The residual stromal bed thickness,corneal flap thickness,CH and CRF at 12 mo after surgery were significant different between Ziemer group and Moria 110-20 group(P〈0.01); Ziemer group gained better corneal biomechanical results.The CRF and CH increased gradually from 1 to12 mo after surgery in Ziemer group,increased from 1 to 6 mo but decreased from 6 to 12 mo in Moria 110-20 group.Both CRF and CH at one year after surgery increased with the increasing of residual cornea thickness; pre-LASIK CRF,CRF also increased with residual stromal bed thickness,while CH decreased with the increasing of pre-LASIK intraocular pressure and cornea flap thickness(P〈0.01).CONCLUSION: In one year follow-up,femtosecond laser can provide better cornea flaps with stable cornea biomechanics than mechanical microkeratome.

关 键 词:FEMTOSECOND MICROKERATOME BIOMECHANICS KERATOMILEUSIS 

分 类 号:R779.63[医药卫生—眼科]

 

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