The type of material the IOLs are manufactured from can influence their spectral transmission; however, the variations in the visible spectral region are negligible and only some differences can be observed in the ultraviolet region mainly caused by the type of ultraviolet filter incorporated in them.14 Only Oculaid intraocular lenses (Ophtec, Groningen, The Netherlands) were used in this study. The material is a hydrophilic acrylic copolymer with an ultraviolet (UV) inhibitor (). However, these lenses let some ultraviolet radiation through, so the measurements can provide information about light scattering in this area. The powers of the IOLs were 14, 19, 21.5, 26, and 30 diopters. As an example of the method, three explanted IOLs made by different commercial brands with powers of 18, 21.25, and 23 D were used. These IOLs come from cadaveric cornea donors, so even though it would be possible to deduce the manufacturer by the IOL shape and type of haptics, because we cannot do so with certainty, we shall refer to these IOLs only by their power. We measured their power with an optical lens meter (Magnon LM350) by placing a diverging ophthalmic lens in the lens holder. Physiological saline solution (NaCl 0.9%) was added to the concave side of the lens where the IOL was submerged to be measured. This device has two advantages: on the one hand, the IOL is measured in a liquid medium which is how the IOL behaves in vivo, and on the other hand, the ophthalmic lens made it possible to measure positive powers higher than the lens meter could under normal conditions. With regard to the material these three IOLs are made of, we can only say that it is not PMMA as none of the three are rigid, so they are acrylic or silicone. The 21.25 D IOL has a yellow filter.