Paper-thin optical lenses simple enough to mass produce like microchips could enable a new generation of compact optical devices. Researchers have fabricated and tested flat lenses called Fresnel ...

Once you get an up-to-date prescription and a contact lens fitting with your eye doctor, ordering them online is often cheaper and far more convenient than placing an order via your doctor.

The IAEA invites Member States to participate in the next ConvEx-3, the IAEA’s highest level and most complex emergency exercise. Hosted by Romania on 14 and 15 May 2025, this major exercise will ...

After testing the Nikon Nikkor Z 50mm f/1.4, we still think the 50mm f/1.8 S is a better choice for your first fast prime lens. Nikon has been a powerhouse in the camera industry since the ...