JENVIS Research c/o Ernst-Abbe University of Applied Sciences Jena, Jena, Germany.
Ernst-Abbe University of Applied Sciences Jena, Jena, Germany.
Optom Vis Sci. 2021 Nov 1;98(11):1270-1278. doi: 10.1097/OPX.0000000000001796.
Ultraviolet (UV) and visible light transmittance of soft contact lenses (SCLs) was measured. A significant difference in UV transmittance has been found between SCLs with a positive and negative back vertex power (BVP). It can be shown that thicker SCLs absorb more UV radiation.
This study aimed to determine UV and visible light transmittance of different SCLs with and without UV protection filters.
Twenty-one lens brands were investigated in the BVP range of -12.00 to +6.00 D. Three SCLs were measured per BVP 25 times. Three hundred thirty-nine SCLs with UV filter (stenfilcon A, somofilcon A, narafilcon A, senofilcon A, senofilcon C, etafilcon A, nesofilcon A) and 489 SCLs without UV filter (delefilcon A, lotrafilcon A, lotrafilcon B, comfilcon A, balafilcon A, samfilcon A, asmofilcon A, nelfilcon A, omafilcon A, hilafilcon B, ocufilcon D, hioxifilcon A, omafilcon B) have been examined. The measurement setup was created according to ISO 18369-3.
All UV-absorbing labeled test SCLs meet UV protection class 2. senofilcon A, senofilcon C, and narafilcon A meet the higher UV protection class 1 level. A statistically significant difference in UV transmittance (280 to 380 nm) has been found between SCLs with a positive BVP (+1.00 to +6.00 D) and SCLs with a negative BVP (-1.00 to -12.00 D), both without (P = .04) and with UV filters (P = .02).
With the ISO-conforming, diopter-independent measurement setup, the UV-absorbing test contact lenses that meet the current international standards, regardless of their BVP, were identified. Lenses with increased center thickness absorb more UV radiation. Further studies may use a modified measurement setup with a larger aperture than 10 mm. It would also be worthwhile to examine the UV absorption of the contact lens over the complete corneal area and limbal area because UV radiation may damage inner ocular tissues like the crystalline lens as well as limbal stem cells.
测量了软性隐形眼镜（SCL）的紫外线（UV）和可见光透过率。在具有正后顶点焦度（BVP）和负后顶点焦度的 SCL 之间发现了 UV 透过率的显著差异。可以表明，较厚的 SCL 吸收更多的 UV 辐射。
本研究旨在确定具有和不具有 UV 保护滤光片的不同 SCL 的 UV 和可见光透过率。
在 -12.00 至 +6.00 D 的 BVP 范围内研究了 21 个镜片品牌。每个 BVP 测量了 3 次，共 25 次。测量了 339 个带有 UV 滤光片（stenfilcon A、somofilcon A、narafilcon A、senofilcon A、senofilcon C、etafilcon A、nesofilcon A）和 489 个不带 UV 滤光片的 SCL（delefilcon A、lotrafilcon A、lotrafilcon B、comfilcon A、balafilcon A、samfilcon A、asmofilcon A、nelfilcon A、omafilcon A、hilafilcon B、ocufilcon D、hioxifilcon A、omafilcon B）。根据 ISO 18369-3 建立了测量设置。
所有带有 UV 吸收标记的测试 SCL 均符合 UV 防护等级 2。senofilcon A、senofilcon C 和 narafilcon A 符合更高的 UV 防护等级 1 水平。在具有正 BVP（+1.00 至+6.00 D）和具有负 BVP（-1.00 至-12.00 D）的 SCL 之间，无论是否带有 UV 滤光片（均 P =.04），UV 透过率（280 至 380nm）均存在统计学差异。
使用符合 ISO、与屈光度无关的测量设置，可以识别符合当前国际标准的带有 UV 吸收的测试隐形眼镜，无论其 BVP 如何。中心厚度增加的镜片吸收更多的 UV 辐射。进一步的研究可能需要使用具有大于 10mm 孔径的改进的测量设置。检查隐形眼镜在整个角膜区域和角膜缘区域的 UV 吸收也很有价值，因为 UV 辐射可能会损害眼内组织，如晶状体和角膜缘干细胞。
