Analysis of the morphological changes of anterior segment after ICL implantation in the treatment of high myopia
Objective To explore the morphological changes of anterior segment after implanttable contact lens(ICL)implantation in the treatment of high myopia.Methods A total of 60 patients(113 eyes)with high myopia were selected,all of whom were treated with ICL implantation.Both groups were compared in terms of changes of naked-eye vision,best corrected visual acuity,morphological changes of anterior segment[central corneal thickness(CCT),corneal curvature(K-value),anterior chamber depth(ACD)],and the changes of corneal aberrations[corneal higher-order aberration(CHOA),corneal low-order aberration(CLOA),total corneal aberration(CTA)]before and after treatment.Results The naked-eye vision and the best corrected visual acuity at 30 d,90 d and half a year after treatment were better than those before treatment(P<0.05).The corneal thickness were(532.50±25.40),(532.54±23.17),(534.64±22.55)and(532.97±24.10)μm before treatment,30 d,90 d and half a year after treatment,the corneal curvature were(43.80±0.89),(43.55±0.92),(43.55±0.97)and(43.43±1.03)D,and the anterior chamber depth were(3.22±0.14),(3.06±0.17),(3.06±0.14)and(3.09±0.11)mm.Compared with before treatment,the corneal curvature and anterior chamber depth were decreased at 30 d,90 d and half a year after treatment(P<0.05).There was no significant difference in corneal thickness before and after treatment(P>0.05).CHOA at 30 d,90 d and half a year after treatment was higher than that before treatment(P<0.05).There were no significant differences in CLOA and CTA at 30 d,90 d and half a year after treatment compared with those before treatment(P>0.05).Conclusion In patients with high myopia,ICL implantation can improve the best corrected visual acuity and naked-eye vision.The corneal curvature becomes smaller,the central anterior chamber depth becomes shallow,and the anterior chamber angle becomes narrow.The anterior ganglia of patients in the early postoperative stage is good,and the cornea is less affected.It is safe and can promote the patients'early postoperative recovery.
High myopiaCentral anterior chamber depthNaked-eye visionImplanttable contact lens implantationCorneal curvature
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