Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

$Influence of Earth's Curvature and Atmospheric Refraction on Leveling$ 01:26

Influence of Earth's Curvature and Atmospheric Refraction on Leveling

During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.

Focusing of Light in the Eye

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

Adjusting a Traverse

Adjusting a Traverse

In the site survey of a four-sided traverse, internal angles are essential to ensure geometric accuracy. The survey revealed that the sum of the measured internal angles was 359 degrees and 48 minutes, which is 12 minutes less than the expected 360 degrees. This discrepancy signals an error likely arising from measurement inaccuracies during the fieldwork.To rectify this error, the adjustment process involved distributing the 12-minute shortfall equally across the four internal angles. By...

Equation of the Elastic Curve

Equation of the Elastic Curve

The concept of curvature in plane curves, crucial in structural engineering, defines how sharply a beam bends under load. This curvature is determined using the curve's first and second derivatives.
Consider a cantilever beam with a point load at its free end (for instance, a diving board). When analyzing beam deflection with small slopes, the shape of the beam's elastic curve becomes key. The governing equation for this analysis involves the bending moment and the beam's flexural...

Bending of Curved Members - Strain Analysis

Bending of Curved Members - Strain Analysis

The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member...

Beams with Unsymmetric Loadings

Beams with Unsymmetric Loadings

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...

You might also read

Related Articles

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

Sort by

Same author

Critical slowing down of semiarid vegetation resilience is amplified by intensifying heatwaves.

Nature communications·2026

Same author

Ultra flash cold events under global warming.

Nature communications·2026

Same author

Application and Evaluation of a NOAA GFS-Driven Air Quality Model Using CMAQv5.4 and High-Resolution Emissions: FIREX-AQ 2019.

Journal of geophysical research. Atmospheres : JGR·2026

Same author

In tune with AI: Singing as a social surrogate to ease loneliness and foster social connection.

Applied psychology. Health and well-being·2026

Same author

Experimental Determination of Isothermal Sections in the Ni-Al-Cr-Ru Quaternary System: Implications for Ni-Based Superalloys and High-Entropy Alloys.

Materials (Basel, Switzerland)·2026

Same author

Dust storms: Hidden drivers of extreme rainfall and global precipitation shifts.

Science advances·2026

Search research articles

Related Experiment Video

Updated: Jun 26, 2025

Cell-based Assay Protocol for the Prognostic Prediction of Idiopathic Scoliosis Using Cellular Dielectric Spectroscopy

Cell-based Assay Protocol for the Prognostic Prediction of Idiopathic Scoliosis Using Cellular Dielectric Spectroscopy

Published on: October 16, 2013

Is refractive error a factor affecting scoliosis?

Jianru Cai¹, Yue Zhou¹, Xiaojuan Chen¹

¹Department of Ophthalmology, Second Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China.

|May 13, 2024

Summary

This summary is machine-generated.

Refractive errors like myopia do not influence scoliosis development in children. However, lower body mass index, rural living, and older age are associated with increased scoliosis risk.

More Related Videos

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device

Published on: November 8, 2024

$Subjective Refraction Test Using a Smartphone for Vision Screening$

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

Related Experiment Videos

Last Updated: Jun 26, 2025

Cell-based Assay Protocol for the Prognostic Prediction of Idiopathic Scoliosis Using Cellular Dielectric Spectroscopy

Cell-based Assay Protocol for the Prognostic Prediction of Idiopathic Scoliosis Using Cellular Dielectric Spectroscopy

Published on: October 16, 2013

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device

Minimally Invasive Treatment for Thoracolumbar Burst Fracture Using Sagittal Alignment Screws and A Trauma Reduction Device

Published on: November 8, 2024

$Subjective Refraction Test Using a Smartphone for Vision Screening$

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

Area of Science:

Pediatric Orthopedics
Ophthalmology
Epidemiology

Background:

Scoliosis is a common pediatric spinal disorder requiring surgical intervention.
Refractive errors are prevalent globally, impacting vision.
The relationship between refractive errors and scoliosis development is not well-established.

Purpose of the Study:

To investigate the correlation between various refractive errors and the development of scoliosis in school-aged children.
To identify other potential risk factors associated with scoliosis in this population.

Main Methods:

A cross-sectional study was conducted in Nantong City, China, in 2023.
Stratified cluster sampling included school-aged students.
Univariate and multivariate logistic regression analyses examined correlations between scoliosis and parameters including refractive errors, body mass index (BMI), living area, and age.

Main Results:

The prevalence of scoliosis was 2.2% among students.
Myopia, hyperopia, astigmatism, and anisometropia showed no significant correlation with scoliosis development (p≥0.05).
Lower BMI (aOR=0.92), rural residence (aOR=1.40), and older age (aOR=1.32) were significantly associated with higher scoliosis risk.

Conclusions:

Refractive errors are not correlated with the development of pediatric scoliosis.
Lower BMI, residing in rural areas, and older age are identified as significant risk factors for scoliosis.