It has a hard plastic convex wand which hugs the lips beautifully and is easy to keep clean - much more satisfying than Summer Fridays ’ concave rubber tip, which can be a bit messy and awkward ...

It has a hard plastic convex wand which hugs the lips beautifully and is easy to keep clean - much more satisfying than Summer Fridays' concave rubber tip, which can be a bit messy and awkward to ...

Light is initially reflected off the primary mirror at the back of the lens onto the much smaller secondary mirror at the ...

Through the middle ages, the technology for mirrors was crude: Fashioned from blown glass, they were usually small and often convex ... portraits on your phone to photo-filtering software that ...

A custom-built reflecting telescope, dubbed the ‘light cannon’, is located on the roof. It tracks the sun in two axes using concave and convex mirrors. The daylight is beamed through a series of ...