Search on Chromophore IOLs: What Does the Evidence Say?
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Some of the key conclusions are that violet light is more damaging than blue light. And blue and violet light both make halos worse as they tend to “scatter”. But blue light is very important for night vision / contrast sensitivity. So allowing blue light is a double-edged sword. It can degrade night vision by contributing halos but it can also improve night vision because scoptic vision is very reliant on blue light transmittance. The best compromise may be an IOL that only filters out violet light with a very steep drop off and keeping the blue light. The J&J Synergy is the only IOL that does this as far as I know. Other J&J lenses don’t do any filtering at all. Alcon cuts out a big swath of both violet and blue light in an attempt to mimic a 20 year old eye. I personally don’t buy into that. Why mimic a 20 year old eye if you can achieve vision that is maybe better than a 20 year old eye? As long as it’s not contributing to long term / old age macular degeneration.
I think simulating a natural eye may have benefits to some people that are doing work that is very colour sensitive. That would include people doing photography and especially that which includes skin tones. They typically go to some lengths to ensure there colour monitors are calibrated regularly so they get consistent results when printing. That assumes your customers have natural eyes and you are trying to see what they see. I know for sure that my cataract eye has a fairly deep yellow orange tint and does affect colors, much more than my blue light filtering ArySof lens.
Yah that’s a good point actually. I’m actually a designer myself so I should have thought of that! Haha.