Thinking about hitching a ride on a mission to Mars? One hazard you haven`t considered
(PHYSorg.com Space & Earth)

The hazards of space flight are well known: freezing temperatures, the vacuum of space, radiation, isolation. But there`s a lesser-known risk getting the attention of researchers - a possible danger to vision. Retired NASA astronaut David Wolf, M.D., will provide insight into how space flight affects the eye on Thursday, April 19, when he gives the keynote address during a conference attended by many of the nation`s leading eye physicians and surgeons, hosted by the American Academy of Ophthalmology in Washington, D.C.