Over time, the colours of your Datacolor® SpyderCheckr colour visor will fade due to light exposure. After all, this gradual damping affects the correctness of the colour balance in your photographic work. If you notice that the red thumbnail has changed to a yellow-orange colour* in the lower-left corner of the inside of the Checkr window, it's time to replace the visors. This gives you the real colours that are designed spectrally for the 48 patches on both sides to get the best colour fidelity in your photos.