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VISX 20/20B VisionKey™엑시머레이저의 version 4.01 software를 이용한 근시교정술 및 근시성난시교정술의 임상성적 비교
이상범,배상복 영남대학교 의과대학 2000 Yeungnam University Journal of Medicine Vol.17 No.1
VISX 엑시머레이저 굴절교정각막절제술의 경우 근시는 다영역 단연마법(Multi-zone, Single pass Ablation)으로, 근시성난시는 타원형 방식(Elliptical mode)에 의해 교정하는 원리를 채택하고 있다. VISX 20/20B VisionKey™ 엑시머레이저의 version 4.01 software를 이용하여 시술한 근시교정술(PRK)과 근시성난시교정술(PARK)의 임상성적에 차이가 있는지 알아보고자 하였다. 1995년 3월부터 1996년 12월까지 엑시머레이저 굴절교정각막절제술을 시행하고 술후 1년까지 경과관찰이 가능했던 PRK 152안, PARK 203안을 대상으로 후향적 연구를 시행하였다. 나안시력, 교정시력, 굴절력, 안압, 각막 혼탁, 각막지형도 등을 술후 1, 3, 6 및 12개월에 검사하였으며, 모든 환자는 12개월 이상 경과관찰하였다. 술후 1년에 나안시력이 0.7 이상인 경우가 -7D 미만의 PRK군(110안)에서 94.8%, PARK군(104안)에서 88.1%이었고, -7D 이상의 PRK군(31안)에서 86.1%, PARK군(57안)에서 67.1%이었다. 예측도가 ±1D 이내인 경우가 PRK 및 PARK에 따라 -7D 미만에서 97.4%, 93.2%이었고, -7D 이상에서는 각각 80.6%, 70.6%이었다. 본 연구에서 종전의 보고된 연구 결과들에 비해 나안시력 개선 및 예측도 등에서 상대적으로 우수한 성적을 나타내었음을 알 수 있었다. 대부분의 근시와 근시성난시는 VISX 20/20B VisionKey™ 엑시머레이저를 이용하여 효과적으로 치료할 수 있었고 PARK에서도 PRK와 유사한 정도의 우수한 성적을 얻었으나, PRK에 비해 보다 정확한 중심잡기와 축정렬 등의 주의가 요망된다. 향후 엑시머레이저와 소프트웨어의 발전에 의해 두 군 모두에서 성적향상을 기대할 수 있으리라 생각된다. Purpose : To compare the efficacy, predictability, stability and safety of excimer laser photorefracive keratectomy(PRK) for myopia and photoastigmatic refractive keratectomy(PARK) for compound myopic astigmatism. Methods : Two-hundred and three eyes(118 eyes <-7D spherical equivalent, 85 eyes ≥-7D spherical equivalent) received excimer laser correction for compound myopic astigmatism and 152 eyes(116 eyes <-7D, 36 eyes ≥-7D) for simple myopia. A VISX 20/20B VisionKey™ excimer laser was used to perform either PARK or PRK. Visual acuity with and without correction, refraction, IOP, corneal haze, and topography were evaluated at 1, 3, 6, and 12 months postoperatively. All patients were followed up for more than 12 months. Results : Postoperative refraction were generally stable after 3 months without significant early overcorrection. At 12 months, 110(94.8%) eyes that underwent PRK and 104(88.1%) eyes that underwent PARK achieved UCVA of 20/30 or better in the group who had lower than -7D correction. For eyes treated with -7D or more, these figures were 31(86.1%) eyes after PRK and 57(67.1%) eyes after PARK. The incidences of within 1D of plano refraction at 1 year follow-up were 97.4% after PRK and 93.2% after PRK and 93.2% after PARK in the group who had lower than -7D correction. For eyes treated with -7D or more, these figures were 80.6% after PRK and 70.6% after PARK. Conclusions : Myopia with or without astigmatism was successfully treated in most of the eyes using PRK or PARK with VISX 20/20B VisionKey™ excimer laser. The predictability and stability of the postoperative refraction during the first 12 months seem to be quite reliable. Further improvement of excimer laser system and software should increase the clinical outcomes and safety of refractive procedures.
李漢景,尹尙華,吳範泰 龍仁大學校 1993 용인대학교 논문집 Vol.9 No.-
By examining the changes of the records resulting from the menstrual cycles of female weight lifters, this study tries to control their conditions and to provide the basic materials which are necessary to overcome the negative aspects of psychological, physical changes during menstration. The subjects of this study are 20 female weight lifters of a women high school in K district. We have measured for 3 months their records of the snatch and the jerk on the 5th day before, the 3rd day during, and the 7th day after the menstruation. The records of each level of the experiment and those of each phase of the menstruation are put into the One-Way ANOVA analysis : and on the results regarding α=0.5 the post-investigation is persecuted on the Student-New man-Keuls Test. The conclusion of the study is as follows : 1.The record of the snatch of the 48kg class is the highest after and the lowest before the menstruation (P< .05) . In the 56kg class the record after the menstruation is higher than the record before and during the menstruation(P< .05). 2.The record of the jerk for both(48kg and 56kg) classes is the highest after the menstruation, and the record during it is next, and the record before it is the lowast(P< .05) . 3.The total record is also higher the menstruation than before or during the menstruation for both weight classes(P< .04) .