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 Concept Videos

Assessment of the Cardiovascular System III: Palpation01:27

Assessment of the Cardiovascular System III: Palpation

Palpation involves feeling the body to evaluate texture, size, consistency, and tenderness for assessing cardiovascular health. The following steps are organized in a head-to-toe order:
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above the...

You might also read

Related Articles

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

Sort by
Same author

Histidine Supplementation Stabilizes Hearing and Vision and Improves Growth in HARS1-Related Autosomal Recessive Disorder Associated With Usher-Like Symptoms.

American journal of medical genetics. Part A·2026
Same author

Patient-centred outcomes following non-operative treatment or appendicectomy for uncomplicated acute appendicitis in children.

BMJ paediatrics open·2023
Same author

Teaching cultural safety principles: optometry student perceptions.

Clinical & experimental optometry·2023
Same author

Accommodative response to ocular surface pain.

Clinical & experimental optometry·2021
Same author

Conservative treatment for uncomplicated appendicitis in children: the CONTRACT feasibility study, including feasibility RCT.

Health technology assessment (Winchester, England)·2021
Same author

Determining the spectral transmittance of photochromic contact lenses.

Contact lens & anterior eye : the journal of the British Contact Lens Association·2021

Related Experiment Video

Updated: Jun 3, 2026

Comparing Objective Conjunctival Hyperemia Grading and the Ocular Surface Disease Index Score in Dry Eye Syndrome During COVID-19
06:29

Comparing Objective Conjunctival Hyperemia Grading and the Ocular Surface Disease Index Score in Dry Eye Syndrome During COVID-19

Published on: May 25, 2022

Grading bulbar redness using cross-calibrated clinical grading scales.

Marc M Schulze1, Natalie Hutchings, Trefford L Simpson

  • 1Centre for Contact Lens Research, School of Optometry, University of Waterloo, Waterloo, Ontario, Canada. m3schulz@sciborg.uwaterloo.ca

Investigative Ophthalmology & Visual Science
|April 9, 2011
PubMed
Summary
This summary is machine-generated.

Cross-calibrated bulbar redness scales show good agreement, but perceived redness varies with scale dynamic range. This allows for better comparison of grading estimates across different methods.

More Related Videos

Measuring Psoriasis Severity at Home
02:28

Measuring Psoriasis Severity at Home

Published on: March 1, 2024

Doppler Optical Coherence Tomography of Retinal Circulation
10:46

Doppler Optical Coherence Tomography of Retinal Circulation

Published on: September 18, 2012

Related Experiment Videos

Last Updated: Jun 3, 2026

Comparing Objective Conjunctival Hyperemia Grading and the Ocular Surface Disease Index Score in Dry Eye Syndrome During COVID-19
06:29

Comparing Objective Conjunctival Hyperemia Grading and the Ocular Surface Disease Index Score in Dry Eye Syndrome During COVID-19

Published on: May 25, 2022

Measuring Psoriasis Severity at Home
02:28

Measuring Psoriasis Severity at Home

Published on: March 1, 2024

Doppler Optical Coherence Tomography of Retinal Circulation
10:46

Doppler Optical Coherence Tomography of Retinal Circulation

Published on: September 18, 2012

Area of Science:

  • Ophthalmology
  • Optometry
  • Clinical Research

Background:

  • Bulbar redness grading scales are used to assess ocular surface health.
  • Standardization of these scales is crucial for reliable clinical assessment and research.
  • Existing scales like McMonnies/Chapman-Davies (MC-D), Institute for Eye Research (IER), Efron, and Validated Bulbar Redness (VBR) may yield different estimates.

Purpose of the Study:

  • To determine the between-scale agreement of grading estimates for bulbar redness.
  • To compare the MC-D, IER, Efron, and VBR grading scales using cross-calibrated reference images.

Main Methods:

  • Modified reference images for each scale were psychophysically scaled for perceived redness (0-100 range).
  • Ten observers rated 16 sample images by placing them relative to the reference images of each scale.
  • Perceived redness was measured as the distance from the 0 mark and averaged across observers.

Main Results:

  • Perceived redness significantly depended on the sample image and the reference scale used (P = 0.0008).
  • Between-scale correlation coefficients of concordance ranged from 0.93 (IER vs. Efron) to 0.98 (VBR vs. Efron).
  • Between-scale coefficients of repeatability ranged from 5 to 8 units on the 0-100 scale.

Conclusions:

  • Cross-calibration enables comparison of grading estimates from different bulbar redness scales.
  • Perceived redness is influenced by the dynamic range of a scale's reference images.
  • Scales with shorter dynamic ranges tend to yield higher redness estimates.