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

Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

465
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
465
Identifying Statistically Significant Differences: The F-Test01:14

Identifying Statistically Significant Differences: The F-Test

3.9K
The F-test is used to compare two sample variances to each other or compare the sample variance to the population variance. It is used to decide whether an indeterminate error can explain the difference in their values. The underlying assumptions that allow the use of the F-test include the data set or sets are normally distributed, and the data sets are independent of each other. The test statistic F is calculated by dividing one variance by another. In other words, the square of one standard...
3.9K
Design Example: Strain Gauge Bridge or Wheatstone Bridge01:15

Design Example: Strain Gauge Bridge or Wheatstone Bridge

1.1K
The utilization of strain gauges as transducers for converting mechanical strain into electrical signals is a common practice in various engineering applications. These strain gauges are frequently integrated into Wheatstone bridge circuits to accurately measure parameters such as force or pressure. Within this context, each element within the circuit exhibits a resistance that undergoes subtle variations when subjected to mechanical strain. The primary objective is to convert minuscule...
1.1K
F Distribution01:19

F Distribution

10.8K
The F distribution was named after Sir Ronald Fisher, an English statistician. The F statistic is a ratio (a fraction) with two sets of degrees of freedom; one for the numerator and one for the denominator. The F distribution is derived from the Student's t distribution. The values of the F distribution are squares of the corresponding values of the t distribution. One-Way ANOVA expands the t test for comparing more than two groups. The scope of that derivation is beyond the level of this...
10.8K
Significance Testing: Overview01:04

Significance Testing: Overview

12.9K
Significance testing is a set of statistical methods used to test whether a claim about a parameter is valid. In analytical chemistry, significance testing is used primarily to determine whether the difference between two values comes from determinate or random errors. The effect of a particular change in the measurement protocol, analyst, or sample itself can cause a deviation from the expected result. In the case of a suspected deviation/outlier, we need to be able to confirm mathematically...
12.9K

You might also read

Related Articles

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

Sort by
Same author

The Effect of Horizontal Rectus Muscle Surgery on Distance-Near Incomitance.

American journal of ophthalmology·2019
Same author

Unilateral strabismus surgery in patients with exotropia results in postoperative lateral incomitance.

Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus·2014
Same author

DVD--a conceptual, clinical, and surgical overview.

Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus·2014
Same author

Fusional amplitudes: exploring where fusion falters.

The American orthoptic journal·2013
Same author

Learning to teach: a summary of the 3rd IOA Education Forum, June 26, 2012.

Strabismus·2013
Same author

How to perform the reversed fixation test.

The American orthoptic journal·2010
Same journal

Motor and sensory outcomes after botulinum toxin A injection versus unilateral medial rectus recession in small-to-moderate angle esotropia.

Strabismus·2026
Same journal

Bimedial rectus recession versus botulinum toxin injection for the treatment of infantile esotropia.

Strabismus·2026
Same journal

Worsening abducens paresis and chronic orbital venous congestion after carotid-cavernous fistula embolization: long-term motility outcomes.

Strabismus·2026
Same journal

Strabismus following Endonasal sinus surgery: a 10-year retrospective analysis of clinical profile and outcomes.

Strabismus·2026
Same journal

Correction.

Strabismus·2026
Same journal

Surgical management of iatrogenic medial rectus transection following functional endoscopic sinus surgery: a report of two cases.

Strabismus·2026
See all related articles

Related Experiment Video

Updated: Feb 25, 2026

A Millimeter Scale Flexural Testing System for Measuring the Mechanical Properties of Marine Sponge Spicules
11:25

A Millimeter Scale Flexural Testing System for Measuring the Mechanical Properties of Marine Sponge Spicules

Published on: October 11, 2017

9.8K

Fusional Amplitudes: Developing Testing Standards.

Katherine J Fray1,2

  • 1a Department of Ophthalmology , Arkansas Children's Hospital , Little Rock , Arkansas , USA.

Strabismus
|August 1, 2017
PubMed
Summary
This summary is machine-generated.

Clinical assessment of fusional amplitudes varies. This study found that encouragement, testing order, and distance significantly impact measurements in normal subjects, highlighting the need for standardized testing protocols.

Keywords:
Convergencedivergenceencouragementfusional amplitudesvergence

More Related Videos

Biaxial Mechanical Characterizations of Atrioventricular Heart Valves
11:00

Biaxial Mechanical Characterizations of Atrioventricular Heart Valves

Published on: April 9, 2019

15.1K
Ultrasonic Fatigue Testing in the Tension-Compression Mode
06:54

Ultrasonic Fatigue Testing in the Tension-Compression Mode

Published on: March 7, 2018

11.2K

Related Experiment Videos

Last Updated: Feb 25, 2026

A Millimeter Scale Flexural Testing System for Measuring the Mechanical Properties of Marine Sponge Spicules
11:25

A Millimeter Scale Flexural Testing System for Measuring the Mechanical Properties of Marine Sponge Spicules

Published on: October 11, 2017

9.8K
Biaxial Mechanical Characterizations of Atrioventricular Heart Valves
11:00

Biaxial Mechanical Characterizations of Atrioventricular Heart Valves

Published on: April 9, 2019

15.1K
Ultrasonic Fatigue Testing in the Tension-Compression Mode
06:54

Ultrasonic Fatigue Testing in the Tension-Compression Mode

Published on: March 7, 2018

11.2K

Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • Binocular vision stability relies on fusional amplitudes.
  • Current clinical assessment methods for fusional amplitudes lack global standardization.

Purpose of the Study:

  • To investigate variations in fusional amplitude assessment among normal subjects.
  • To identify factors influencing fusional amplitude measurements, including testing distance, order, examiner encouragement, and subject alertness.

Main Methods:

  • Prospective study with a modified crossover design involving 99 subjects with normal eye exams.
  • Fusional amplitudes assessed in two sessions, with randomized order of testing and varied testing distances.
  • Subjects evaluated with and without examiner encouragement.

Main Results:

  • Divergence amplitudes were significantly reduced when assessed after convergence.
  • Examiner encouragement significantly impacted convergence measurements.
  • Near fusional amplitude measurements were consistently higher than distance measurements.
  • A significant negative correlation was observed between subject age and convergence break point.

Conclusions:

  • Variations in testing protocols (order, encouragement, distance) significantly affect fusional amplitude measurements.
  • Standardized testing procedures are crucial for consistent and reliable clinical assessment of fusional amplitudes.
  • Age is a factor influencing convergence break point in individuals with normal binocular vision.