난시용 ICL 삽입술의 회전 안정성
Rotational Stability after Toric Implantable Collamer Lens Implantation
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목적: 난시를 동반한 근시를 교정하기 위해 난시용 Implantable Collamer Lens (ICL)를 삽입 후 렌즈 축의 회전 변화를 평가하고자하였다. 대상과 방법: 난시용 ICL 삽입술을 시행 받은 66명 118안을 대상으로 평균 37개월의 장기간 경과 관찰 시 렌즈 축의 회전 변화와그에 따른 시력 변화, 난시 도수의 변화를 평가하였다. 결과: 난시용 ICL 삽입술 후 나안시력은 118안 중 107안(91%)이 0.8 이상의 시력 호전을 보였다. 난시 도수는 술 전 평균 -2.96 ±1.13D에서 술 후 평균 -0.64 ± 0.61D로 줄어 들었으며, 난시용 ICL의 축의 위치 변화는 경과 관찰 기간 동안 평균 2.4 ± 3.8도를보였다. 118안 중 2안(1.7%)이 10도 초과 축의 위치 변화를 보였는데 2안 모두 시력 저하를 동반하였고, 각각 18도, 30도 축의 회전변화, 1.50D, 1.00D의 난시 도수의 증가를 보였다. 나머지 116안(98.3%)은 경과 관찰 기간 동안 시력저하 증상을 유발하는 회전 변화없이 탁월한 회전 안정성을 보여 주었다. 결론: 난시가 동반된 고도 근시 교정을 위한 난시용 ICL 삽입술은 장기적으로 렌즈의 축 변화가 거의 없이 안정적으로 유지된다.
Abstract
Purpose: To evaluate rotational stability of Toric Implantable Collamer Lens (ICL) implantation to correct myopic astigmatism. Methods: We estimated the degree of Toric ICL rotation together with change in visual acuity and astigmatism in 118 eyes of 66patients who underwent Toric ICL implantation and had a long-term mean follow-up period of 37 months. Results: After Toric ICL implantation, 107 (91%) out of 118 eyes showed uncorrected visual acuity of 0.8 or better. The meanpostoperative astigmatism decreased to -0.64 ± 0.61 D from a mean preoperative astigmatism of -2.96 ± 1.13 D. The mean axischange of Toric ICL was 2.4 ± 3.8 degrees during follow-up period. Two (1.7%) out of 118 eyes showed the axis change of morethan 10 degrees. These two eyes had a decrease in visual acuity, rotational axis change of 18 degrees and 30 degrees, respectively,and increases in astigmatism of 1.50 D and 1.00 D, respectively. The remaining 116 eyes (98.3%) showed excellentrotational stability without visual acuity decreasing Toric ICL rotation during the follow-up period. Conclusions: Toric ICL implantation to correct high myopia with astigmatism rarely has axis rotation and maintains excellent rotationalstability for long-term follow-up.
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