Abstract

Objective To discuss the situation and predisposing factors of corneal Haze after epipolis laser in situ keratomileusis(EPI-LASIK).Methods A total of 250 eases(120 men and 130 women; mean age of 22.25 years old)were included in the present series(from December 2007 to February 2008),who were all outpatients in the second people's hospital of Jinan.Preoperative examination for all the patients included uncorrected visual acuity,best corrected visual acuity,slit-lamp findings,dilated funduseopy,subjeetive and cycloplegic refractions,intraocular pressure,corneal topography,and corneal thickness.The patients were all followed up for more than six months after EPI-LASIK.The time of formation and disappearance and the density of Haze were observed.The factors related to Haze were analyzed and compared.Results At six months,the overall frequency of clinically significant Haze was 33.60% ;the frequency of Haze grade 0.5 was 31.98%,grade 1 was 1.63%.The time of formation was 42.75±23.50(15-150 days).The time of disappearance was 102.30t:38.86(35-193 days).The refractive error was -6.41±1.60 D,ablation depth was 87.01±14.42nm,the ablation depth/corneal thickness(AD/CT)ratio was 0.17±0.26,on which eyes Haze were found.The ineidence of Haze was statistically greater with higher refractive errors,higher ablation depth and higher ablation depth/corneal thickness ratio.And no difference was found related to sex,age,intraocular pressure,corneal thickness and contact lens wear preoperatively.Conclusions There is a lower incidence and density of Haze in Epi-LASIK.Higher myopia,deeper ablation and higher ablation depth/corneal thickness ratio obviously influenee the Haze formation. Key words: Haze; Refraetive; Myopia; Laser; Keratomileusis

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