Optic neuritis is a condition in which the optic nerve becomes inflamed and swollen, leading to an acute severe impairment of vision in the affected eye. The swelling may further lead to damage to the ...

When a massive star collapses or two neutron stars collide billions of light-years away, the explosion can unleash a brief, blinding flash of gamma rays. Catching that flash and pinpointing its origin ...

A freeform optical component is not symmetric around its optical axis. It provides some attractive features to optical designers to correct multiple aberrations with fewer optical surfaces, and make ...