Limbal relaxing incisions using a reference point and corneal topography for intraoperative identification of the steepest meridian.
Limbal relaxing incisions using a reference point and corneal topography for intraoperative identification of the steepest meridian.
复制标题
使用参考点和角膜地形图进行角膜缘松弛切口，以在术中识别最陡的子午线。
DOI：
10.3928/1081597x-20101005-02
复制
发表时间：
2011
影响因子：
2.4
通讯作者：
S. Amano
中科院分区：
文献类型：
--
作者：
K. Miyata;Takashi Miyai;K. Minami;H. Bissen;N. Maeda;S. Amano
目的
PURPOSE
To examine the efficacy and safety of topography-based limbal relaxing incision (LRI) surgery.
METHODS
Forty-four eyes of 36 consecutive patients who underwent cataract surgery more than 1 month previously, had refractive against-the-rule astigmatism of ≥2.00 diopters (D), and were scheduled to undergo LRI surgery were enrolled in the study. Patients were randomized into two groups-a topography-based LRI group (19 eyes of 14 patients) and a conventional LRI group (25 eyes of 22 patients). The topography-based LRI procedure comprised 3 steps: placing a mark on the cornea and conjunctiva, identifying this mark in the topographic image, and performing LRI based on the location of the mark. In the conventional LRI group, the horizontal meridian was marked under a slit lamp and LRIs were made based on the position of the horizontal mark.
RESULTS
Corneal astigmatism in the topography-based LRI group before and 1 month after surgery was 2.03±0.92 D and 1.33±0.69 D, respectively (P=.014). Corneal astigmatism in the conventional LRI group before and 1 month after surgery was 2.36±0.77 D and 0.93±0.70 D, respectively (P<.0001). Fourier harmonic analysis of the topography data demonstrated that regular astigmatism was significantly decreased in the two groups. The mean regular astigmatism was not significantly different before and after LRI between groups, whereas the variances (mean of the deviation squared from its mean) of regular astigmatism were significantly different between groups 1 month after LRI.
CONCLUSIONS
Compared with conventional LRI surgery, a topography-based procedure may reduce the deviation of the effect of LRIs.
通过视频角膜摄影数据的傅里叶级数谐波分析定量评估不规则散光。
影响因子：
4.4
作者：
Tetsuro Osbika;A. Tomidokoro;Kyoko Maruo;Tadatoshi Tokunaga;Norio Miyata
通讯作者：
Norio Miyata