Retinal straylight and the yellow Bag in the Lens IOL

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To evaluate the influence of blue-blocking Bag in the Lens (BIL) intraocular lens (IOL) on retinal straylight.


Twenty-one patients scheduled for bilateral senile cataract surgery with a BIL intraocular implant (Morcher GmbH, Germany) randomly received implantation of either a UV light-filtering and blue-light filtering IOL (Morcher 89A yellow BIL) or a UV-light filtering lOL (Morcher 89A, clear BIL) in both eyes. Only the left eyes were included in this study. Best corrected visual acuity and retinal straylight level were evaluated 3 months postoperatively with decimal charts at 4m and with C-Quant (Oculus Optigeräte, Wetzlar, Germany) respectively.


There were 11 eyes in the yellow BIL group and 10 eyes in the clear BIL group. Preoperative measurements (K1, K2, anterior chamber depth, axial length, IOL power) showed no significant differences between the yellow and the clear BIL group. No significant difference in visual acuity was found between both groups (p = 0.512). Mean retinal straylight did not differ significantly (p = 0.809) between yellow BIL (1.24 ± 0.26) and clear BIL (1.19 ± 0.21), even after correction for age and axial length with the pseudophakic model (p =0.557).


The UV and blue-blocking bag-in-the-lens had no influence on visual acuity and retinal straylight measured 3 months postoperatively, in comparison with a UV filtering bag-in-the-lens.

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