Excellent. I can't stress enough how comfortable they are and of course that's important as I don't wear glasses regularly and I'm not used to the feeling. They have a very tolerant shade of yellow. Coatings block the UV and higher Kelvin spectrum (4000k+ gives me a headache) and I'm very happy with them. I suffered from migraines for several weeks before ordering these glasses. My experience is anecdotal but at the end of the day I got these glasses, the eyestrain was almost unnoticed and I had no headaches. I'm a muddler and I sat on them. When I ordered a second pair they arrived with a manufacturing defect and New Silk Road (the seller) was delighted. They sent replacements immediately, no questions asked.
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