Scientists find a woman that can see 99 million more colors than you or me

Just one extra cell type can make a huge difference.

Half the world will need glasses by 2050

Nearly half the world’s population, close to some 5 billion people, will develop myopia by 2050 according to a study recently published in the journal Ophthalmology. The paper also estimates that one-fifth of these people will have a significantly increased risk of becoming permanently blind from the condition if recent trends continue.

How the eye works: what you can’t see

How eyesight works and other functions.