perimeter /pər-imˈi-tər/

1. The circuit or boundary of any plane figure, or the sum of all its sides (geometry)
2. The boundary of a camp or fortified position
3. The outer edge of any area
4. An instrument for measuring the field of vision (ophthalmology)

perimetric /per-i-metˈrik/, perimˈetral or perimetˈrical adjective

perimˈetry noun (ophthalmology)

Measurement of the field of vision

• haven't
• have on
• have-on
• have one foot in the grave
• have one's back to the wall
• have one's cake and eat it
• have one's collar felt
• have one's ear to the ground
• have oneself to thank for
• have one's end away
• have one's eye on
• have one's face lifted
• have one's feet on the ground
• have one's fill of
• have one's finger on the button
• have one's fingers all thumbs
• have one's hands full
• have one's head screwed on
• have one's head screwed on the right way
• have one's heart in it
• have one's heart in one's boots
• have one's heart in one's mouth
• have one's heart in the right place
• have one's heart set on
• have one's knife in