an eye for an eye

an eye for an eye and a tooth for a tooth

eye and eye turnbuckle

eye relief (=eye-point distance)

eye relief，eye distance

eye to eye contact

eyetoeye contact

2D median filter

2-median problem

3-D median filter

Abdominal median incision

absolute median

Activity Median Diameter

adaptive directional weighted median filtering

adaptive median filter

Adaptive median filtering

Adaptive switching median filtering

adaptive switching median filters

AMAD (activity-median aerodynamic diameter)