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A 1981 review of various studies to evaluate the effect of the X-chrom contact lens concluded that, while the lens may allow the wearer to achieve a better score on certain color vision tests (specifically pseudoisochromatic plates like the Ishihara test), it did not correct color vision in the natural environment.
The Act followed a surge in the use of contact lenses by Americans, which had been increasing ever since soft contact lenses became commercially available. The Act also followed a 1997 investigation by 17 state attorneys general that found that purchasers of contact lenses from eye care practitioners had no fewer ocular health problems than ...
In the US market, soft contact lenses are approved by the US Food and Drug Administration. [2] The American Optometric Association published a contact lens comparison chart called Advantages and Disadvantages of Various Types of Contact Lenses on the differences between them. [3] These include: soft contact lenses; rigid gas-permeable (RGP ...
Consumer Reports (CR), formerly Consumers Union (CU), is an American nonprofit consumer organization dedicated to independent product testing, investigative journalism, consumer-oriented research, public education, and consumer advocacy.
Reading in dim light causes eye strain rather than permanent damage to the eye. [203] Color blindness cannot be significantly alleviated by glasses or lenses. While there are lenses marketed towards the colorblind, their efficacy is doubted by professionals, and they do not enable wearers to see new colors. [338]
Abuses akin to ballot stuffing of favourable reviews by the seller (known as incentivized reviews), or negative reviews by competitors, need to be policed by the review host site. Indeed, gathering fake reviews has become big business. [2] In 2012, for example, fake book reviews have been revealed as significantly affecting ratings on Amazon.