Zaky Adel Galal, KhalafAllah Mahmoud Tawfik, Sarhan Abdelrahman Elsebaey, Elsawy Moataz Faiz
Menoufia Faculty of Medicine, Shebeen El-Kom, Egypt.
J Ophthalmol. 2020 Feb 19;2020:3983508. doi: 10.1155/2020/3983508. eCollection 2020.
To evaluate a new tangential map-based nomogram versus the axial map-based nomogram for ICRS in keratoconus.
A prospective case series study including 64 eyes of 64 patients who underwent ICRS implantation. Cone location was determined for each eye with two maps: the axial and the tangential. Appropriate ring selection was determined using two surgical nomograms: axial map-based and tangential map-based. Visual, refractive, and topographic outcomes were assessed before, as well as at 3, 6, and 12 months after ICRS implantation.
The cone location, and consequently the ring selection, was significantly different in the two nomograms with a "centralization tendency" in the tangential map. In the axial group, UDVA and CDVA improved from 0.12 ± 0.04 and 0.24 ± 0.08 to 0.28 ± 0.08 and 0.4 ± 0.1, respectively. Similarly, MRSE substantially decreased from -6.7 ± 3.3 to -1.2 ± 1.1 at 12 months after the procedure. In the tangential group, UDVA and CDVA improved from 0.09 ± 0.06 and 0.2 ± 0.1 to 0.5 ± 0.2 and 0.7 ± 0.2, respectively. MRSE substantially decreased from -4.9 ± 1 at 12 months after the procedure. In the tangential group, UDVA and CDVA improved from 0.09 ± 0.06 and 0.2 ± 0.1 to 0.5 ± 0.2 and 0.7 ± 0.2, respectively. MRSE substantially decreased from -4.9 ± 1 at 12 months after the procedure. In the tangential group, UDVA and CDVA improved from 0.09 ± 0.06 and 0.2 ± 0.1 to 0.5 ± 0.2 and 0.7 ± 0.2, respectively. MRSE substantially decreased from -4.9 ± 1=0.01 . Similarly, the gain in the CDVA was 0.4 and 0.15 in the tangential and axial groups, respectively, at 12 months, =0.01 . Similarly, the gain in the CDVA was 0.4 and 0.15 in the tangential and axial groups, respectively, at 12 months.
The tangential map-based nomogram attained better visual and refractive outcomes at 1 year. In addition, the cone location was significantly different between both maps with a centralization tendency in the tangential one.
评估一种新的基于切线图的列线图与基于轴向图的列线图在圆锥角膜中用于国际角膜屈光手术学会（ICRS）的情况。
一项前瞻性病例系列研究，纳入64例接受ICRS植入术的患者的64只眼。使用轴向图和切线图确定每只眼的圆锥位置。使用两种手术列线图（基于轴向图和基于切线图）确定合适的环选择。在ICRS植入术前以及术后3个月、6个月和12个月评估视力、屈光和地形图结果。
两种列线图中的圆锥位置以及因此的环选择存在显著差异，切线图有“集中趋势”。在轴向组中，最佳矫正远视力（UDVA）和矫正视力（CDVA）分别从0.12±0.04和0.24±0.08提高到0.28±0.08和0.4±0.1。同样，术后12个月时平均残余散光（MRSE）从-6.7±3.3大幅降至-1.2±1.1。在切线组中，UDVA和CDVA分别从0.09±0.06和0.2±0.1提高到0.5±0.2和0.7±0.2。术后12个月时MRSE从-4.9±1大幅下降。在切线组中，UDVA和CDVA分别从0.09±0.06和0.2±0.1提高到0.5±0.2和0.7±0.2。术后12个月时MRSE从-4.9±1大幅下降。在切线组中，UDVA和CDVA分别从0.09±0.06和0.2±0.1提高到0.5±0.2和0.7±0.2。术后12个月时MRSE从-4.9±1 = 0.01。同样地，术后12个月时切线组和轴向组的CDVA增益分别为0.4和0.15，= 0.01。同样地，术后12个月时切线组和轴向组的CDVA增益分别为0.4和0.15。
基于切线图的列线图在1年时获得了更好的视力和屈光结果。此外，两张图之间的圆锥位置存在显著差异，切线图有集中趋势。
