Eyewear index

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Determine which lens is best for you based on your prescription, frame type, and lifestyle. Our lenses are all made with advanced plastics and are available in seven indexes, which will determine how thick or thin your glasses lenses will be. Those with a stronger prescription often prefer high-index for thinner lenses, while those who are active may need impact-resistant options. Our complimentary basic plastic lenses are available in two indexes. Thinner and lighter than our basic lenses, high-index lenses are recommended for those with combined Rx powers over High-index lenses have reduced edge thickness for nearsightedness and reduced center thickness for farsightedness.

Eyewear index

We also enjoy a high reputation through our good performance. Better performance is going to be expected as our principle of integrity. Devotion and Steadiness will remain as ever. If you have any special requirements, can contact with our sales people, we can do all series service similar as our Domestic brand. Blue light is naturally produced by the sun but also by computer monitors, smartphone screens and other digital devices. In addition to these, blue light is produced by LED and fluorescent lights, and compact fluorescent light bulbs. Blue light is essential in maintaining your sleep and wake cycle, mood and keeping your memory sharp. Believe it or not, but today, almost everyone is a victim of Computer Vision Syndrome CVS , a condition which results from focusing the eyes on a computer or any gadget for prolonged hours. Continuous working on digital screens means focusing and refocusing your eyes back and forth. This leads to eyestrain, dry and sticky eyes. Blue Cut Lenses is to block and protect your eyes from high energy blue light exposure. The most common effects of too much blue light exposure are eye strain, blurred vision, and headaches.

Article Google Scholar Shi, J. Wu, S.

Thank you for visiting nature. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser or turn off compatibility mode in Internet Explorer. In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript. Vegetation indices VIs , which describe remotely sensed vegetation properties such as photosynthetic activity and canopy structure, are widely used to study vegetation dynamics across scales.

Log In Sign Up. Defend your eyes from UV, infrared, and blue light. Get your personalized frame-finding shopping experience. Return to the office with new glasses and a fresh outlook. Dark lenses that adapt to changing light outdoors and in the car not clear indoors. Indulge in freshly bloomed styles inspired by the season. Enjoy clarity in your VR adventures with fog-resistant lenses.

Eyewear index

Free Standard Shipping on All U. You might need single-vision lenses to tackle myopia nearsightedness , astigmatism an irregularly shaped cornea , and hyperopia farsightedness. There are also bifocals and progressive lenses for those who need to toggle between near and far vision. From high-index and polycarbonate lenses, there's a lot to consider when choosing a lens type.

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Current and near-term advances in Earth observation for ecological applications. Cheng, R. Assessing leaf pigment content and activity with a reflectometer. Rouse, J. Didan, K. Article Google Scholar Brown, L. Plants 7 , — First observations of global and seasonal terrestrial chlorophyll fluorescence from space. Sorry, a shareable link is not currently available for this article. Article Google Scholar Chen, Y.

Determine which lens is best for you based on your prescription, frame type, and lifestyle. Our lenses are all made with advanced plastics and are available in seven indexes, which will determine how thick or thin your glasses lenses will be. Those with a stronger prescription often prefer high-index for thinner lenses, while those who are active may need impact-resistant options.

Fensholt, R. By Matilda Rudd. New Phytol. Article Google Scholar Hantson, S. Analysis of NDVI and scaled difference vegetation index retrievals of vegetation fraction. Characterizing land surface anisotropic reflectance over rugged terrain: a review of concepts and recent developments. Article Google Scholar Vargas, M. Article Google Scholar Zhu, Z. Change Biol. Atmospheric conditions for monitoring the long-term vegetation dynamics in the Amazon using normalized difference vegetation index.