Household items Bias against left-handed people

1 household items

1.1 scissors
1.2 computer input devices
1.3 knives
1.4 cameras

household items

right-handed tools can difficult, uncomfortable, or dangerous left-handed people use.

scissors

for example, (right-handed) scissors arranged that, in right hand, fingers , thumb push blades laterally, creating shearing action essential scissors utility. in left hand, however, fingers , thumb tend force right-handed blades apart, that, rather being sheared, work-material merely hacked, knife, or slips between blades uncut. left-handers using right-handed scissors try compensate forcing handles apart laterally, causing discomfort or injury first knuckle of thumb.

in addition, right-handed person using right-handed scissors can see cutting line, left-handed user upper blade obscures view.

many scissors offered ambidextrous or suitable right- or left-handed use. typically, these merely right-handed scissors modified handles permit use in left hand less discomfort, because blades still arranged right-handed use, not perform in left hand.

computer input devices

input devices computers can present obstacles left-handed operation if intended right-handed use. computer set-ups have mouse placed on right side of keyboard , unable repositioned left. mouse shaped fit right hand better. functions of mouse buttons, on mice shaped fit both hands, default right-hand use. on two-button mice, left button —under index finger of right-handed person— primary button, while right button performs secondary functions. on-screen pointers configured right-handed people. desktop operating systems allow user reverse functionality of mouse buttons accommodate left-handed use, left-handed cursors need specially downloaded. trackballs , trackpads shaped right-handed use. ability change functionality of buttons, these devices may difficult left-handed use. left handed person there computer mice designed left handed use, smaller segment of marketplace.

a right-handed trackball difficult use left hand.


knives

while european-style kitchen knives symmetrical, japanese kitchen knives have cutting edge ground asymmetrically, having cutting edge closer user s body ratios ranging 70–30 average chef s knife, 90–10 professional sushi chef knives; left-handed models rare, , must specially ordered or custom made. on other hand, majority of flat ground general-purpose knives typically have cutting edge on right, left-handed knife, aesthetic reasons rather practical.

cameras

one of few cameras ever produced left-handers half-frame yashica samurai. cameras predominantly have hand grip, shutter release, film wind lever , commonly used selection buttons, switches , dials controlled right hand. lens controls (where present) tend accessible either hand. when unskilled left-handed person uses right-handed camera hand control can less steady , hence produce camera shake leading poorer pictures @ low shutter speeds.