perimeter

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perimeter

1. Maths
a. the curve or line enclosing a plane area
b. the length of this curve or line
2. a medical instrument for measuring the limits of the field of vision

perimeter

[pə′rim·əd·ər]
(mathematics)
The total length of a closed curve; for example, the perimeter of a polygon is the total length of its sides.

perimeter

The boundary of a system or network, which defines the inside and outside. It is typically determined by firewalls and addresses. See DMZ.
References in periodicals archive ?
[22] correlating the standard automated perimetry mean sensitivity and the global mean RNFL throughout different stages of glaucoma found that the curvilinear relationship between the morphologic and perimetric results may be due to the wide variability in normal morphology and limitations in the dynamic range of the morphologic tests in cases with moderate and severe defects.
Diagnosing pre perimetric glaucoma with spectral domain optical coherence tomography.
This study also suggests a possible role of quantitative perimetric indices in early detection of tobacco-induced ocular damage and thereby helps in preventing further damage to the optic nerve.
Localized defects are the easiest to detectand may be very specific to differentiate early glaucoma from normal eyes, while they occur in 10 to 20% of ocular hypertensive eyes, they must be looked for in every glaucoma suspect as the high specificity is clinically useful in identifying patients with impending or established perimetric loss29.
New perimetric threshold test algorithm with dynamic strategy and tendency oriented perimetry (TOP) in glaucomatous eyes.
PromoItalia's brochure for its Proslimet "beauty instrument" claims "perimetric [size] reduction of treated area up to 2cm after only one session".
The duality of the task (detection plus recognition) distinguishes it from conventional perimetric procedures.
They are bin-shaped surrounded by a perimetric levee (20% of the total area) that encloses a depressed center (80% of the area) (Bonfils, 1962; Latinoconsult, 1972).
On display will be the original plastic pallets from Craemer, the highly acclaimed one piece moulded CR1 manufactured to industry standards (Euro 1200 x 800mm) and the heavy duty CR3 (UK 1200 x 1000mm) which is available as perimetric or with three runners.
Among other standard features are climate control, cruise control, four electric windows, electric door mirrors, front and side airbags, leather grips, front and rear reading lamps, RDS and CD player, electronic brake force distribution and brake assist in the ABS, superlocking with ultrasonic and perimetric alarm and 16in alloys.
Persons typically describe new scotomas resulting from laser treatments as "large black spots" or "boulders," but over a few months, these spots fade and can no longer be localized without perimetric testing.
All models have twin front, side and curtain airbags, alloy wheels, dual zone climate control air conditioning, front and rear electric windows, electric door mirrors and remote control central locking with a Category 1 ultrasonic and perimetric alarm.