Abstract
Purpose: To compare the characteristics of the intermittent exotropia patients with spontaneous regression to the surgically corrected group. Methods: Twenty-five patients who had exodeviation of around 25 prism diopters (PD). Visual acuity and best corrected visual acuity were measured. The latter was obtained by using cycloplegic refraction. Far and near deviation angles were measured through alternating prism cover test. Stereo acuity was measured using a Titmus stereo acuity test chart and occlusion was performed for those who had more than 2 lines of difference between the best corrected visual acuity of the left and right eyes on the Snellen E chart. We divided the patients into two groups. The first group is the spontaneous regression group (SRG), who showed declining deviation angles and maintained less than 10 PD for more than 3 months. The second group is the surgically corrected group (SCG), showed the same or increasing deviation angle and underwent operation. Results: There was no difference in the age or observation period between the two groups. The prevalence period was significantly higher in the SRG than in the SCG. The deviation angle from a distance at the first visit was not different for the SCG from that of the SRG. However, the deviation angle at near was significantly larger for the SCG than that of the SRG and increased at the last examination. Stereo acuity of the SRG was better than that of the SCG at the first visit. Conclusions: Deviation angle could be reduced in the mild intermittent exotropia patients with relatively small deviation angle at near or with good stereo acuity. J Korean Ophthalmol Soc 47(8):1306-1310, 2006
목적 : 경도의 간헐외사시가 자연 퇴행을 보인 환아들의 특성을 알아보고, 수술적 치료군과 비교해 보고자 하였다. 대상과 방법 : 경도의 간헐외사시 환아중 사시각이 25 프리즘디옵터(PD) 내외인 25명 대상의 후향적 연구이다. 나안시력, 교정시력을 측정하고 조절마비제($Cyclogyl^{(R)}$) 점안 후 굴절검사로 최대교정시력으로 교정하였다. 프리즘 교대가림검사로 근거리와 원거리 사시각을 측정하였다. 티트무스 입체시검사표로 입체시각을 측정하였다. 양안 최대교정시력이 Snellen E 시력표에서 두 줄 이상 차이나는 경우의 가림치료를 시행하였다. 사시값이 감소하여 10PD 이내로 3개월 이상 유지된 자연소실군과 지속되거나 증가한 수술치료군을 비교하였다. 결과 : 두 군간 평균 연령과 평균 관찰 기간의 차이는 없었다. 유병기간은 자연 관찰군에서 유의하게 높았으며(p<0.01), 초진시 수술적 치료군의 근거리 사시각은 유의하게 크게 나타났으며(p<0.01) 최종 관찰시 의미있게 증가하였다(p<0.01). 자연 관찰군에 있어서 초진시 입체시능력이 더 좋았다(p=0.01). 결론 : 경도의 간헐외사시 환자에서 근거리 사시각이 적거나, 입체시능력이 양호한 경우 사시의 자연퇴행을 기대해 볼 수 있다. <한안지 47(8):1306-1310, 2006>