Amber Eye Care and Micro Surgery Centre, Thane, Maharashtra, India.
Indian J Ophthalmol. 2020 Apr;68(4):583-586. doi: 10.4103/ijo.IJO_1253_19.
To assess the role of Scheimpflug imaging in improving the accuracy of reference marking for toric IOL implantation.
In this prospective, randomized, clinical trial all patients with cataract and pre-existing significant regular corneal astigmatism, who required implantation of a toric IOL were included in the study, and patients with any ocular pathology or abnormality were excluded. Patients were divided into two groups: For one group of patients, Group I (GI), reference marking was finalized using slit lamp only, and for the second group, Group II (GII), after slit lamp marking, the reference marks were checked using Goniometer of Scheimpflug imaging. The primary outcome was to determine the axis of toric intraocular lens (IOL) postoperatively (within 1 hour) and compare it with the desired axis of placement.
We found a statistically significant difference in the two groups (P < 0.001) suggesting Group II (4 step technique) is better than Group I (3 step technique).
Scheimpflug imaging, an extra step preoperatively, is an effective measure to reduce errors in reference marking and thereby improving the refractive outcome of toric intraocular lens.
评估 Scheimpflug 成像在提高散光人工晶状体植入参考标记准确性方面的作用。
在这项前瞻性、随机、临床试验中，所有需要植入散光人工晶状体的白内障伴预先存在的明显规则性角膜散光的患者均被纳入研究，排除任何眼部疾病或异常的患者。患者分为两组：第一组患者（GI）仅使用裂隙灯完成参考标记，第二组（GII）在裂隙灯标记后使用 Scheimpflug 成像的眼压计检查参考标记。主要结局是确定术后（1 小时内）的散光人工晶状体（IOL）轴向，并与预期的放置轴进行比较。
我们发现两组之间存在统计学差异（P<0.001），表明第二组（4 步技术）优于第一组（3 步技术）。
Scheimpflug 成像，术前的额外步骤，是一种减少参考标记误差的有效措施，从而提高散光人工晶状体的屈光效果。
