51.   China began to market a new portable laser weapon that can dazzle and blind the human eye at ranges of up to two miles.

52.   China is marketing a new portable laser weapon that can dazzle and blind the human eye at ranges of up to two miles.

53.   Cognex sells a computer system with an optical attachment that replaces the human eye in detecting flaws during a manufacturing run.

54.   Creating a realistic final product has proven exceptionally difficult because light can take long, complicated paths, creating subtle effects to which the human eye is finely attuned.

55.   Curfiss said the U.S. government had decided to use green because an Army survey determined it to be the easiest color for the human eye to see.

56.   For all the pictures, filters introduced false colors to highlight textures and material recorded in infrared wavelengths that would otherwise be invisible to the human eye.

57.   For many years, human eyes were not all that useful in Southern California lookout towers.

58.   He noted that at extremely high levels of magnification, the human eye witnesses a surreal scene to which it is unaccustomed.

59.   His eyes are human eyes, alive with memories of other seasons at this place, with intelligence and hope.

60.   Human eyes are always on information overload.