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Arithmetic by Computer and by Human

Long multiplication, long division and logarithms are, for many, dim-remembered...

Visual disorders affect the way we see, and therefore would...

Did the eye evolve and, if so, how? Creationists and...

As the eye ages, profound structural changes occur, leading to...

Studying the history of spectacles brings together the twin themes...

In 1900 a group of sponge divers blown off course...

Evolving in a silent, dark world, organisms developed receptors that...

The visual system has developed to allow us to navigate...

It is not only a personal tragedy to be born...

The transparent tissues of the eye allow light to reach...