They also do their job. I was happy with this purchase as the glasses arrived on time and were durable and comfortable. I fully expected complaints from my two children to get them to put them on and wear them, but surprisingly I got no resistance. They both wore glasses with no problem and didn't take them off until I had to remind them to take them off (that is, after watching their tablets). Two thumbs up for this product. The children even took some pictures with glasses. They were a hit. It may be too difficult to determine the benefit of the glasses at this stage, but I've worn them for several hours and found that my eyes didn't strain as they normally do without glasses.
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