- 期刊
- OpenAccess
前房型人工水晶體置入後前房隅角之變化
The Changes of Anterior Chamber Angle Resulting from Implantation of A-C Intraocular Lens
摘要
觀察50眼經置入Leiske前房型人工水晶體後其圈架(loop)之位置與前房角之變化，發現圈架在鞏膜岬上之正常位置，與之緊密接觸者只有6眼(12%)，其他則或多或少有些不正常之變化，包括圈架脫位併周邊虹彩下壓，圈架插入併前房角後退，小撮彩虹前跨，虹彩包住圈架，周邊虹彩大片前黏連，虹彩推頂疊起等。前房角新生血管則未曾出現。在6點位置之變化較12點位置為多。手術後短暫出現的併發症中，除瞳孔阻斷與前房角大片虹彩前黏連之發生有關外，其他與前房角之變化無關連。與前房角變化有關之後遺症只有瞳孔偏移(22%)，並無持續性虹彩炎、青光眼、復發性前房出血或角膜水腫等之發生。矯正視力86%在6/7.5或以上。
關鍵字
無資料並列摘要
The anterior chamber angles were examined before implantation and 3 to 6 months following implantation of Leiske anterior chamber IOL in 50 consecutive cases. The positions of the loop and the changes of its adjacent structures were recorded and analysed. In normal condition, the loop would sit right on the inner surface of scleral spur without any other structural changes; it was termed ”fit”. It is found only in 6 cases in which both upper and lower loops showed completely ”fit”. The rest of the cases showed more or less abnormal loop position as well as changes in the chamber angle structure. These included subluxation-depression in 40%; insertion of loop-angle recession 8%; iris wick 25%; enveloping of loop 38%; peripheral anterior synechiae 16%; tucking of iris 2%. There was no neovascularization found. The angle changes around the lower loop occured more frequently than the upper ones. 86% of cases had vision of 6/7.5 or better post-operatively and did not affect to these angle changes. Ovally distorted pupil was a frequent and annoyed finding (22%); some of them might develop several months after the surgery. The real mechanism for a loop to develop this pupillary change needs further study. The possible causes of angle changes and ovally distorted pupil were discussed.