Snell’s Law explains light refraction at material boundaries, a principle crucial to fiber optics, lens design, and advanced ...

Contact lens fitting may be adversely influenced by dry eyes, a common side effect of refractive surgery. Appropriate management of tear deficiency is of paramount importance. Corneal topography ...

Executive Editor David Carnoy has been a leading member of CNET's Reviews team since 2000. He covers the gamut of gadgets and is a notable reviewer of mobile accessories and portable audio ...

Nasha is a Managing Editor for CNET, overseeing our sleep and wellness verticals. She is a nutrition, mental health, fitness and sleep science enthusiast. Her passion for mindful and holistic ...