From the Department of Ophthalmology, Willis-Knighton Medical Center, Shreveport, Louisiana (LoBue, Martin, Shelby, Coleman); Department of Ophthalmology, SUNY Downstate Medical Center, Brooklyn, New York (Saba); St. Georges University School of Medicine, Grenada, West Indies (Catapano).
J Cataract Refract Surg. 2024 Jul 1;50(7):754-759. doi: 10.1097/j.jcrs.0000000000001455.
To compare maximum tensile strength between commonly used 3-piece intraocular lens (IOL) for flanged intrascleral haptic fixation (FISHF).
Willis-Knight Eye Institute, Shreveport, Louisiana.
Laboratory investigation.
Haptic tensile strength was compared with MA60AC, CT Lucia 602, AR40E, and the light-adjustable lens (LAL). Haptic strength with a 24-diopter (D) IOL was compared across all lenses, as well as across a range of 10 to 30 D with the MA60AC. A custom device was created to hold the IOL in correct haptic orientation. The maximum tension (mean ± SD) was recorded in Newtons (N) when the haptic lost tension or broke.
CT Lucia was the strongest at 1.53 ± 0.11 N vs 1.00 ± 0.15 (MA60AC), 0.87 ± 0.19 (AR40E), and 0.83 ± 0.14 N (LAL) ( P < .001). The LAL and AR40E were similar to a 9-0 polypropylene suture while being significantly stronger than 10-0 polypropylene suture ( P < .001). No difference in haptic tension for the MA60AC from 10 to 30 D ( P > .05). High magnification revealed the highest haptic fractures for MA60AC at 40% compared with LAL, AR40E, and CT Lucia at 0%. CT Lucia and AR40E had 100% of haptics disinserted from the IOL without any damage compared with 60% LAL and 60% MA60AC. CT Lucia, AR40E, and LAL have a flatter haptic angulation at 5 degrees.
Haptic strength, durability, and angulation of the LAL may support the possibility of FISHF in the hands of experienced surgeons. However, further testing is strongly recommended to verify whether physiologic conditions or light treatments may compromise long-term haptic stability.
比较常用于带边巩膜扣带固定（FISHF）的三件式人工晶状体（IOL）的最大拉伸强度。
路易斯安那州什里夫波特的威利斯-奈特眼科研究所。
实验室研究。
比较 MA60AC、CT Lucia 602、AR40E 和光调节晶状体（LAL）的襻拉伸强度。比较所有晶状体的 24 屈光度（D）IOL 襻强度，以及 MA60AC 的 10 至 30 D 范围内的襻强度。创建了一个定制设备来保持 IOL 的正确襻方向。当襻失去张力或断裂时，以牛顿（N）记录最大张力（平均值±标准差）。
CT Lucia 在 1.53 ± 0.11 N 时最强，而 MA60AC 为 1.00 ± 0.15 N，AR40E 为 0.87 ± 0.19 N，LAL 为 0.83 ± 0.14 N（P<0.001）。LAL 和 AR40E 与 9-0 聚丙烯缝线相似，但其强度明显高于 10-0 聚丙烯缝线（P<0.001）。MA60AC 从 10 至 30 D 的襻张力无差异（P>0.05）。高倍放大显示，MA60AC 的襻断裂率最高，为 40%，而 LAL、AR40E 和 CT Lucia 的断裂率为 0%。与 60%的 LAL 和 60%的 MA60AC 相比，CT Lucia 和 AR40E 有 100%的襻从 IOL 上完全脱离，没有任何损伤。与 LAL 相比，CT Lucia、AR40E 和 LAL 的襻角度更平坦，为 5 度。
LAL 的襻强度、耐用性和角度可能支持有经验的外科医生进行 FISHF。然而，强烈建议进行进一步测试，以验证生理条件或光处理是否会影响长期襻稳定性。
