Koch D D, Samuelson S W, Villarreal R, Haft E A, Kohnen T
Cullen Eye Institute, Baylor College of Medicine, Houston, Texas 77030, USA.
J Cataract Refract Surg. 1996 Jun;22(5):579-84. doi: 10.1016/s0886-3350(96)80013-7.
Because the optical performance of eyes implanted with multifocal intraocular lenses will theoretically depend upon the size and position of the pupil relative to the near and distance zones of the lens, we designed a study to determine whether preoperative pupil size is useful in predicting the postoperative pupil size of patients having phacoemulsification with posterior chamber lens implantation.
Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas.
We prospectively measured pupil sizes preoperatively and postoperatively in 71 consecutive patients who had phacoemulsification with posterior chamber lens implantation. Pupil sizes were photographed under five lighting and viewing conditions that simulated a range of normal functional situations.
The mean change in preoperative to postoperative pupil size was less than 0.5 mm in all five testing conditions. However, changes in pupil diameter of 1.0 mm or more were noted in approximately 10% of patients in each testing situation. Sex, iris color, and the presence or absence of intraoperative iris trauma were not predictive factors for determining which patients sustained large postoperative changes in pupil size.
Preoperative pupil size does not predict postoperative size with sufficient consistency to ensure a good match between pupil diameter and the zone sizes of multizone multifocal intraocular lenses.
由于理论上植入多焦点人工晶状体的眼睛的光学性能取决于瞳孔相对于晶状体近、远用区的大小和位置，我们设计了一项研究，以确定术前瞳孔大小是否有助于预测行白内障超声乳化吸除联合后房型人工晶状体植入术患者的术后瞳孔大小。
德克萨斯州休斯顿贝勒医学院眼科卡伦眼科研究所。
我们前瞻性地测量了71例连续行白内障超声乳化吸除联合后房型人工晶状体植入术患者的术前和术后瞳孔大小。在模拟一系列正常功能情况的五种照明和观察条件下拍摄瞳孔大小。
在所有五种测试条件下，术前至术后瞳孔大小的平均变化小于0.5毫米。然而，在每种测试情况下，约10%的患者瞳孔直径变化达1.0毫米或更大。性别、虹膜颜色以及术中是否存在虹膜损伤并非决定哪些患者术后瞳孔大小有较大变化的预测因素。
术前瞳孔大小不能足够一致地预测术后大小，以确保瞳孔直径与多区多焦点人工晶状体的区域大小良好匹配。
