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December 1967

Moonshine, Earthshine, and Vision

Arch Ophthalmol. 1967;78(6):695-696. doi:10.1001/archopht.1967.00980030697001

W E READ about satellite launchings, moon landings, and the space race with varying degrees of interest and wonderment. Most of us then go about our business as usual, for the world of electronics and computers seems to be far removed from ophthalmology. Yet a vast amount of vision research goes into any project involving human guidance vehicles.

One of these projects, the Apollo mission for landing man on the moon, has just been discussed from the point of view of its visual requirements by Jones et al.1 The following account reviews some of these authors' considerations.

The illumination which space travellers and lunar inhabitants will encounter is about one quarter more than that on earth, 12,700 foot-candles in contrast to the 10,800 foot-candles which now prevails with the sun at its zenith. The amount of ultraviolet radiation, will be about double that on the earth and could constitute

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