![Hoya Lens India on Twitter: "BlueControl from Hoya offers more relaxed vision and better contrast perception thus keeping the eyesight in a better condition. https://t.co/xoqyRp5nZ1" / Twitter Hoya Lens India on Twitter: "BlueControl from Hoya offers more relaxed vision and better contrast perception thus keeping the eyesight in a better condition. https://t.co/xoqyRp5nZ1" / Twitter](https://pbs.twimg.com/media/FEm19V_XsAQzGTB.jpg)
Hoya Lens India on Twitter: "BlueControl from Hoya offers more relaxed vision and better contrast perception thus keeping the eyesight in a better condition. https://t.co/xoqyRp5nZ1" / Twitter
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Gray & Bull on Twitter: "Discover the benefits of Hoya's BlueControl lens coating. #hoya #reduceeyefatigue @grayandbull http://t.co/Mjcw9ZA5QJ" / Twitter
![Lens parameters (n is refractive index). Lens 8, the achromatic lens,... | Download Scientific Diagram Lens parameters (n is refractive index). Lens 8, the achromatic lens,... | Download Scientific Diagram](https://www.researchgate.net/publication/336911161/figure/tbl1/AS:819879275921408@1572485860825/Lens-parameters-n-is-refractive-index-Lens-8-the-achromatic-lens-was-used-as-a.png)
Lens parameters (n is refractive index). Lens 8, the achromatic lens,... | Download Scientific Diagram
![Hoya Lens India on Twitter: "Constant exposure to blue light from the gadgets can damage your eyes. BlueControl lenses from Hoya help you protect your eyes keeping them safe and healthy. https://t.co/eXbQHq5vnF" / Hoya Lens India on Twitter: "Constant exposure to blue light from the gadgets can damage your eyes. BlueControl lenses from Hoya help you protect your eyes keeping them safe and healthy. https://t.co/eXbQHq5vnF" /](https://pbs.twimg.com/media/EnFR8YLXcAIRELs.jpg)