Cerebral/Cortical Visual Impairment (CVI) is a neurological visual disorder. Vision loss or impairment due to brain injury or disease can occur at any point in the life-span. CVI can be found in children who function at levels equivalent to typical peers as well as in children with mild to severe disability.
For other uses, see Serengeti (disambiguation). Serengeti Eyewear is a high-end sunglasses designer brand owned by Bushnell Corporation. Their main focus is eye protection, of which the company researches and develops state of the art technology such as photochromic lenses, polarized lenses, spectral control, among other. 1 Overview.
I agree with both Jon and Stephanie. That is, Ray Ban makes high quality sunglasses that have great design (Ray Bans are a classic, timeless design) and are in high demand. And, Luxottica has a monopoly on sunglasses worldwide. They control 80% of the market. They own sunglass brands, they produce for other brands, and they own retail distribution.