Wu Qianru, Liu Yinan, Cai Hongyuan, Zhang Chun, Chen Xiaoyong
Department of Ophthalmology, Beijing Key Laboratory of Restoration of Damaged Ocular Nerve, Peking University Third Hospital, 49 North Garden Road, Haidian District, Beijing, 100191, People's Republic of China.
Int Ophthalmol. 2020 Nov;40(11):3115-3125. doi: 10.1007/s10792-020-01498-y. Epub 2020 Jul 4.
To evaluate the accuracy of an advanced manual corneal astigmatic marking method for toric intraocular lens (IOL) implantation.
From 52 patients, 52 eyes with cataracts and corneal astigmatism were included. The target axis of the toric IOL was marked with the new manual marking method preoperatively and with the Zeiss CALLISTO Eye image-guided system intraoperatively. For the manual method, a slit-lamp with a minimum rotation angle of 5 degrees was used and rotated to the meridian of the toric IOL and incision axes. The relative rotational and vertical deviation of the IOL and incision axes were measured using the digital marker as a reference.
There was no significant difference between the manually marked IOL axis (100.9° ± 65.62°) and the digital mark (100.8° ± 65.76°; P = 0.771). The absolute values of the relative rotational and vertical deviations of the manually marked IOL axis were small, at 2.03° ± 1.44° and 0.46 ± 0.43 mm, respectively. There was no significant difference between the manually marked corneal incision and the digital meridian (P = 0.179). Then, patients were classified into three groups based on the type of astigmatism they had. There was no significant difference in mean absolute deviation among the groups (P = 0.112). The manual incision mark had a relative rotational deviation of 1.65° ± 1.44°. The vertical misalignment of the manually marked incision axis was 0.27 ± 0.30 mm.
Rotational slit-beam marking could be an effective and convenient marking method for toric IOL implantation. This method could be a potential alternative in underdeveloped areas where digital image-guided systems are not available.
评估一种先进的手动角膜散光标记方法用于有晶状体眼人工晶状体（IOL）植入的准确性。
纳入52例患者的52只患有白内障和角膜散光的眼睛。术前使用新的手动标记方法标记有晶状体眼人工晶状体的目标轴，术中使用蔡司CALLISTO Eye图像引导系统。对于手动方法，使用最小旋转角度为5度的裂隙灯并旋转至有晶状体眼人工晶状体和切口轴的子午线。以数字标记为参考测量人工晶状体和切口轴的相对旋转和垂直偏差。
手动标记的人工晶状体轴（100.9°±65.62°）与数字标记（100.8°±65.76°；P = 0.771）之间无显著差异。手动标记的人工晶状体轴相对旋转和垂直偏差的绝对值较小，分别为2.03°±1.44°和0.46±0.43毫米。手动标记的角膜切口与数字子午线之间无显著差异（P = 0.179）。然后，根据患者所患散光类型将其分为三组。各组间平均绝对偏差无显著差异（P = 0.112）。手动切口标记的相对旋转偏差为1.65°±1.44°。手动标记的切口轴垂直错位为0.27±0.30毫米。
旋转裂隙光束标记可能是一种用于有晶状体眼人工晶状体植入的有效且便捷的标记方法。在没有数字图像引导系统的欠发达地区，该方法可能是一种潜在的替代方法。
