Increasingly companies are willing to make bets of billions of dollars almost completely blind, as clinical trials get larger.

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Completely blind in one eye and partially blind in the other, Tarleton is still able to live on her own in her apartment in Vermont.

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He told BBC News the 92-year old was "almost completely blind and hard of hearing" but still loved "a good joke and a glass of wine".

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Canavan does most of his digging in the dark -- not because he's trying to hide but because he's almost completely blind and the sunlight hurts his eyes.

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She was completely blind by then.

NEWYORKER: Temporary

V4 region, he will become completely colour-blind.

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Would King have wanted us to completely ignore race in a "color-blind" society?

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If the critics were to come back today and taste the same wines blind, all over again, the scores would most certainly be completely different.

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When the supply runs completely dry, Herschel will warm from its ultra-low functioning temperature and go blind.

BBC: Science correspondent, BBC News