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 ?
Diagnosing pre perimetric glaucoma with spectral domain optical coherence tomography.
Properties of perimetric threshold estimates from full threshold, ZEST and SITA-like strategies, as determined by computer simulation.
Lindsay Rountree is currently a PhD student at Cardiff University researching the use of stimulus parameters in perimetric testing.
Visual field losses may be identified in as many as 96% of patients using disease-specific perimetric strategies on automated perimetry.
It has been shown that in 60% of perimetric glaucoma eyes, there was already an evidence of alteration in the RNFL 6 years before the occurrence of the visual field defect.
Safety features on the Terrano are top-of-the-range, adding to driver confidence, and include anti-lock brakes, Electronic Brakeforce Distribution, driver and passenger airbags, extra supportive headrests and, to keep the vehicle safe from thieves, an ultrasonic and perimetric alarm system, which, when primed, triggers on sensing something moving inside the vehicle.
The Sunderland-built Primera will come packed with fitted-as-standard goodies including electronic climate control, height and reach adjustable steering column, front electric windows, hands free phone capability, lumbar adjustment, ABS, six airbags, remote central locking, anti-hijack and perimetric alarm and CD radio.
Security features include immobiliser with audio link and ultrasonic and perimetric alarm.
Pressing a key fob button locks the doors and activates the ultrasonic and perimetric alarm system.
Low-cost Ethernet is used across front- and backhaul, and end-user equipment (vCPE), and intelligence distributed across the back-, front-hauls, and perimetric data transports.
1-3) The technique was developed with the integration of a scanning laser ophthalmoscope (SLO) to improve upon the fundus image quality during perimetric examination.