Weapons - Optics 光学  (continued)

FACTORS INFLUENCING HUMAN VISION 1/ age - some of the common changes in vision for older adults: /a/ some loss of ability to see very close objects – probably not relevant except for adjusting the sighting device /b/ needing more time to adjust to changes in the level of light /c/ some challenges in distinguishing colors – like blue from black /d/ decreased depth perception /e/ limited peripheral vision see https://www.nia.nhs/gov In addition, diabetes, high blood pressure, smoking and eye diseases such as macular degeneration can impact vision. /2/ gender - typical vision differences: /a/ men often see finer details /b/ men often see rapidly moving objects better /c/ women usually distinguish middle spectrum (blues and greens) colors better Men have 25% higher levels of testosterone receptors in their visual cortexes.

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