목적: 각막절제술을 이용한 노안수술의 효능과 안전성 및 만족도를 알아보고자 한다. 대상과 방법: MEL80을 이용한 노안교정 환자 67명, 128눈에서 술 전과 술 후 1년에 원거리와 근거리 시력, 원거리 교정상태에서 근거리 시력, 근거리 시표 0.8을 보기 위한 돋보기 도수, 초점심도, 구면 수차를 검사하였다. 결과: 술 전 근시는 56눈, 정시(구면렌즈대응치≤±0.75D)는 19눈, 원시는 53눈이었다. 수술 후 1년에 원거리와 근거리 나안시력, 위조절력은 모두 향상되었다. 원거리와 근거리 최대교정시력은 정시환자에서만 유의한 감소를 보였다. 96눈(75%)에서 0.5이상의 유용한 근거리 나안시력을 얻었고 0.8을 보기 위한 돋보기 도수는 유의하게 감소되었다. 구면 수차는 -0.19 μm에서 0.11 μm로, 초점심도는 1.45D에서 1.69D로 증가하였고 최대교정시력이 2줄 감소한 경우는 원거리는 11눈(8.5%), 근거리는 7눈(5.5%) 이었다. 환자들의 전반적인 만족도는 좋았다. 결론: 각막절제술을 이용한 노안수술은 구면 수차의 증가로 초점심도가 넓어져 원거리 및 근거리 나안시력의 좋은 교정 효과를 보이는 수술 방법이다.
Purpose: To evaluate the efficacy, safety, and subjective symptoms of patients who underwent presbyopic corneal surface ablation. Methods: Excimer laser surgery with MEL80 for refractive errors and presbyopia was performed on 128 eyes of 67 patients. Uncorrected and best-corrected visual acuity, distance-corrected near-visual acuity, spectacle near-addition for Jaeger 1, depth of focus, spherical aberration, and subjective symptoms were evaluated before surgery and 1 year after surgery. Results: This study consisted of a myopia group (56 eyes), an emmetropia group (spherical equivalent ≤ ±0.75D, 19 eyes), and a hyperopia group (53 eyes). Presbyopic corneal ablation improved distance and near uncorrected visual acuity, and distance-corrected near visual acuity at postoperative 12 months. There was no significant change in best-corrected visual acuity but there was a significant decrease in the emmetropia only group. Useful near visual acuity (≥20/40) was found in 96 eyes (75%) and spectacle near addition for Jaeger 1 decreased. Our results showed a significant increase of spherical aberration (from -0.19 μm to 0.11 μm) and depth of focus (from 1.45D to 1.69D). A significant positive correlation was found between spherical aberration and uncorrected far and near visual acuity and depth of focus. Loss of two lines of best corrected visual acuity occurred in 11 eyes (8.5%) at far vision and in 7 eyes (5.5%) at near vision. In general, patient satisfaction was good. Conclusions: Presbyopic corneal ablation with MEL80 showed good distant and near visual results and a wide depth of focus induced by increased spherical aberration.
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