Corneal Topographic Changes after Botulinum Toxin-A Injection in Patients with Essential Blepharospasm

IF 0.1 Q4 OPHTHALMOLOGY
Sangyoon Kim, Jung Hyo Ahn
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Abstract

Purpose: To compare the corneal topographic change before and after botulinum toxin A injection in patients with essential blepharospasm.Methods: From September 2015 to December 2020, we enrolled total 20 patients, 40 eyes diagnosed with essential blepharospasm. We estimated the corneal refractive power and astigmatism before and after Nabota® (Daewoong Co. Ltd, Seoul, Korea) botulinum toxin injection at 1 and 3 months using iTrace® Topography (Software version 4.2.1., Tracey technology Inc., Houston, TX, USA). Corneal refractive power was analyzed in superior, inferior, nasal and temporal location at 1 mm, 3 mm zone. Also, steep and flat keratometry, astigmatism was measured by topography.Results: Corneal refractive power showed significant difference in superior and inferior location of 1 mm zone at 1 month after botulinum toxin injection (p = 0.038, p = 0.042). There was no significant difference in all four locations of 3 mm zone. At 1 month after toxin injection, steep keratometry was only significant reduced (p = 0.046) and with-the-rule astigmatism was shifted to against-the-rule astigmatism. At 3 months after toxin injection, keratometry and astigmatism was resolved to before toxin injection.Conclusions: At 1 month after Nabota® (Daewoong Co. Ltd) botulinum toxin injection, corneal refractive power at vertical axis was flattened and steep keratometry was significantly reduced. At 3 months after toxin injection, corneal topographic change was changed to before toxin injection.
原发性眼睑痉挛患者注射a型肉毒杆菌毒素后角膜地形图的改变
目的:比较原发性眼睑痉挛患者注射A型肉毒杆菌毒素前后角膜地形图的变化。方法:2015年9月至2020年12月,共入组20例患者,40只眼诊断为原发性眼睑痉挛。我们估计了nababta <sup>®</sup>前后角膜屈光度和散光。(Daewoong Co. Ltd, Seoul, Korea) 1个月和3个月时使用iTrace<sup>®</sup>地形(软件版本4.2.1。, Tracey technology Inc., Houston, TX, USA)。分析角膜上、下、鼻、颞部1mm、3mm区域的屈光度。同时,用地形法测量陡角、平角、散光。结果:注射肉毒毒素1个月后,角膜屈光度上、下1mm区有显著性差异(<i>p</i>= 0.038, <i> </i>= 0.042)。在3 mm区域的4个位置,无显著性差异。注射毒素1个月后,陡角测深仅显著降低(<i>p</i>= 0.046),顺势散光变为反顺势散光。注射后3个月,角膜光度和散光恢复到注射前水平。结论:Nabota<®</sup>(Daewoong Co. Ltd)肉毒杆菌毒素注射后,角膜垂直轴屈光度变平,角膜斜度明显降低。注射毒素3个月后,角膜地形图改变为注射毒素前。
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来源期刊
CiteScore
0.20
自引率
0.00%
发文量
126
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