Show night blindness inability to see by day Is matched by the commoner night blindness which moet of us have known in frienda friend or i relative this detect defect which includes nn an inability to see even by artificial artin cial light is congenital with some people and never oer overcome come it is often hereditary it may also be caused hoa however ever by long exposure to over bright light coupled with fatigue A story is told concerning a ships ere crew two centuries ago which was overcome by night blindness so extreme that their captain was obliged to force a fight with a spanish privateer during the day knowing that by night his men would be helpless in order to obviate this difficulty for future occasions lie he ordered each sailor to 10 keep one eye bound durl during ing the abo daytime discovering to lils his gratification that this eye having rested was then free of the defeet defect the sailors were very ery amusing in ID their efforts to retain the bandage well over the file eye that ilia must be ready for night duty and so a 1 method of modifying this trouble was discovered |