Encyclopedia

perimeter

Also found in: Dictionary, Medical, Wikipedia.
(redirected from perimetry)

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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

perimeter

The boundary of a system or network, which defines the inside and outside. It is typically determined by firewalls and addresses. See DMZ.
Copyright © 1981-2025 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
Mentioned in
References in periodicals archive
Test-retest variability of multifocal visual evoked potential and SITA standard perimetry in glaucoma.
(17) Toxicity can be evaluated by subjective tests such as visual acuity score, corneal slit lamp examination, fundus examination and automated central perimetry 10-2 test.
Three children had a visual field defect as measured using Goldmann visual field perimetry (2 hemianopsia, 1 quadranopsia; see Table 2), and 3 children had a deficit of eye motility [37].
The visual field testing was performed using static automated white-on-white threshold perimetry (Humphrey Field Analyzer II; Carl Zeiss Meditec, Dublin, CA) with the 30-2 SITA (Swedish Interactive Threshold Algorithm) standard test.
- the perimetry does not show any significant changes, so that the program used does not address significantly the increase in muscle mass, or its time was too short;
Samuels, "Screening for glaucomatous visual field loss with frequency-doubling perimetry," Investigative Ophthalmology & Visual Science, vol.
In the latest TVST paper, "Refined Frequency Doubling Perimetry Analysis Reaffirms Central Nervous System Control of Chronic Glaucomatous Neurodegeneration", Sponsel and his research team found that the Jigsaw Effect begins at the earliest stages of glaucoma and discovered clues as to which part of the brain is responsible for optimizing vision in the face of glaucoma's slow destruction of sight.
In macroadenomas, the visual field improved in 80% patients (pre- and post-radiosurgery perimetry proven), while successful control of hormone was achieved in 85% functional adenomas.
[2] Nicotine is a poison to the optic nerve, and automated perimetry is one of the important qualitative and quantitative tests that helps in early detection of tobacco-induced ocular damage.
The use of FDT perimetry detected a general decrease in VF sensitivity, based on MD values, that was higher for both eyes but only significant for OS in the Cadre group.
Copyright © 2003-2025 Farlex, Inc Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.