Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Interinstrument variability in Hertel-type exophthalmometers.

Tamsin J Sleep1, Ruth M Manners

  • 1Southampton Eye Unit, Southampton General Hospital, Southampton, UK. tamsinsleep@doctors.org.uk

Ophthalmic Plastic and Reconstructive Surgery
|July 27, 2002
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Does upper lid blepharoplasty improve contrast sensitivity?

Ophthalmic plastic and reconstructive surgery·2012
Same author

Assessment of fatigue in intraocular surgery: analysis using a virtual reality simulator.

Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie·2010
Same author

A novel capsulorhexis technique using shearing forces with cystotome.

Journal of visualized experiments : JoVE·2010
Same author

Autosomal dominant early onset aponeurotic ptosis and corneal limbal vascularization in a three-generation family.

Ophthalmic plastic and reconstructive surgery·2007
Same author

Bilobed flap in ophthalmic plastic surgery: simple principles for flap construction.

Ophthalmic plastic and reconstructive surgery·2005
Same author

A simple modification of the glabellar flap in medial canthal reconstruction.

Ophthalmic plastic and reconstructive surgery·2003
Same journal

Porocarcinoma Arising in a Long-Standing Eviscerated Socket.

Ophthalmic plastic and reconstructive surgery·2026
Same journal

Hyper Immunoglobulin E Syndrome With Conjunctival Molluscum Contagiosum.

Ophthalmic plastic and reconstructive surgery·2026
Same journal

Ethmoiditis Mimicking Acute Dacryocystitis-An Underreported Pathology.

Ophthalmic plastic and reconstructive surgery·2026
Same journal

Orbital Inflammatory Syndrome Associated with Bispecific T-Cell Engager Therapy: Case and Literature Review.

Ophthalmic plastic and reconstructive surgery·2026
Same journal

A Rare Pedunculated Lobular Capillary Hemangioma of the Conjunctiva.

Ophthalmic plastic and reconstructive surgery·2026
Same journal

Core Oculoplastic Procedure Skills for the Comprehensive Ophthalmologist: A Consensus by Delphi Methodology.

Ophthalmic plastic and reconstructive surgery·2026
See all related articles

Measurements of axial globe position can vary significantly, even between identical exophthalmometers from the same manufacturer. This variability, up to 2.9 mm, highlights the need to use the same instrument for serial exophthalmometry to ensure accurate patient treatment.

Area of Science:

  • Ophthalmology
  • Medical instrumentation
  • Clinical measurement

Background:

  • Accurate measurement of axial globe position is crucial for diagnosing and monitoring conditions like exophthalmos.
  • Exophthalmometers are standard tools for this measurement, but their reliability can be a concern.

Purpose of the Study:

  • To assess the variability in axial globe position measurements obtained using different exophthalmometers of the same model and manufacturer.
  • To determine the extent of measurement error introduced by using different instruments of the same type.

Main Methods:

  • Ten Hertel-type mirror exophthalmometers from the same manufacturer were used.
  • A single observer performed multiple measurements on a plastic head model with marked orbital landmarks.
  • Measurements were taken over several days, with the observer masked to previous readings.

Related Experiment Videos

Main Results:

  • Significant variation in axial globe position measurements was observed between instruments of the same make, ranging up to 2.9 mm.
  • Measurements of relative axial globe position also showed variability, from 0.6 mm to 2.4 mm.
  • The mean variation in readings from a single instrument was 0.5 mm.

Conclusions:

  • Variability exists not only between different exophthalmometer brands but also between identical instruments from the same manufacturer.
  • Using the same exophthalmometer for all serial examinations is recommended to minimize measurement error.
  • Observed variations could impact clinical decisions, as differences of 1.5-2.0 mm are often considered significant in patient management.