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Continue to ChatCATRA - Smartphone Accessory That Detects Cataract https://assistivetechnologyblog.com/2011/07/catra-smartphone-accessory-that-detects.html
CATRA - Smartphone Accessory That Detects Cataract https://assistivetechnologyblog.com/2011/07/catra-smartphone-accessory-that-detects.html