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Originally Posted by Mr.Samuel
Screen protector is a good choice if it can filter the violet and ultra violet range of outside light.
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I located two (same manufacturer) that are described as:
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UV and blue light protection for individuals with albanic eye syndrome, corneal dystrophy, diabetic retinopathy and early cataract formation. Tints to a warm amber color and absorbs up to 530nm.
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UV and blue light protection used to help individuals with Glaucoma, macular degeneration, retinitis, pigmentosa and photophobia. Tints to red color and absorbs up to 550nm.
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Notes:
- It is not photochromic, it is a fixed density product.
- Made in USA by a reputable company of long standing.
One can assume that they have dealt with any licensing requirements of their product compounding.
- Available in reasonable quantities (less than a railcar tanker load).
- At a reasonable price, hardly more than 4x or 5x the price of the off-shore, "mystery dyes".
- Can be applied to polycarbonate (which is the plastic I ordered).
- No on-line ordering, I will have to put on my business owner hat and give the sales department a call.
Going by the technical specs and the absorption graph, it looks like only a very light tint of this stuff will do the job intended.