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

You might also read

Related Articles

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

Sort by
Same author

Unveiling the Structural Modifications of Cyanines to Target G‑Quadruplex DNA through Biophysical, Computational, and Transcriptome Analyses.

ACS omega·2026
Same author

Halogenation of nucleic acid structures: from chemical biology to supramolecular chemistry.

RSC chemical biology·2025
Same author

Smart Type I Squaraine Nano-Photosensitizer Combined with MnO<sub>2</sub> for Tumor-Targeted and Ferroptosis-Induced Immunogenic Photodynamic Therapy.

ACS applied materials & interfaces·2025
Same author

Deciphering the Interplay Between G-Quadruplexes and Natural/Synthetic Polyamines.

Chembiochem : a European journal of chemical biology·2024
Same author

How reliable is the evaluation of DNA binding constants? Insights and best practices based on an inter-laboratory fluorescence titration study.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy·2024
Same author

Acidic Lysosome-Anchoring Croconium-Based Nanoplatform for Enhanced Triple-Mode Bioimaging and Fe<sup>3+</sup>-Triggered Tumor Synergistic Therapy.

ACS applied materials & interfaces·2024

Related Experiment Video

Updated: Dec 25, 2025

Measuring the Behavioral Effects of Intraocular Scatter
05:10

Measuring the Behavioral Effects of Intraocular Scatter

Published on: February 18, 2021

3.8K

Lensometer with autocollimation and a square Ronchi grid.

Alberto Cordero-Dávila, Santiago Cruz-Ponce, Jorge González-García

    Applied Optics
    |April 1, 2020
    PubMed
    Summary
    This summary is machine-generated.

    A new lensometer using an autocollimation system and a square Ronchi grid precisely measures refractive powers for various lenses. This compact and affordable device offers comparable accuracy to commercial lensometers.

    More Related Videos

    Author Spotlight: Advancing Knowledge in Far-From-Equilibrium Materials Through Light-Sheet Microscopy
    08:32

    Author Spotlight: Advancing Knowledge in Far-From-Equilibrium Materials Through Light-Sheet Microscopy

    Published on: January 26, 2024

    3.0K
    Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes
    08:27

    Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes

    Published on: March 3, 2023

    1.3K

    Related Experiment Videos

    Last Updated: Dec 25, 2025

    Measuring the Behavioral Effects of Intraocular Scatter
    05:10

    Measuring the Behavioral Effects of Intraocular Scatter

    Published on: February 18, 2021

    3.8K
    Author Spotlight: Advancing Knowledge in Far-From-Equilibrium Materials Through Light-Sheet Microscopy
    08:32

    Author Spotlight: Advancing Knowledge in Far-From-Equilibrium Materials Through Light-Sheet Microscopy

    Published on: January 26, 2024

    3.0K
    Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes
    08:27

    Quantification of Oculomotor Responses and Accommodation Through Instrumentation and Analysis Toolboxes

    Published on: March 3, 2023

    1.3K

    Area of Science:

    • Optics and Photonics
    • Ophthalmology Instrumentation

    Background:

    • Accurate measurement of lens refractive power is crucial for vision correction.
    • Existing lensometers can be expensive or bulky, necessitating simpler alternatives.

    Purpose of the Study:

    • To design, construct, and validate a novel lensometer utilizing an autocollimation system and a square Ronchi grid.
    • To assess the performance of this new lensometer for various lens types, including monofocal, astigmatic, bifocal, and progressive lenses.

    Main Methods:

    • The lensometer employs an autocollimation system and a square Ronchi grid to identify the focal plane by observing spot patterns or fringe minima.
    • Refractive and cylindrical powers are determined by analyzing fringe transformations for astigmatic lenses.
    • Progressive lens analysis involves tracking a zero-spot circle's movement relative to the grid.

    Main Results:

    • The developed lensometer successfully measured the refractive powers of monofocal, astigmatic, bifocal, and progressive lenses.
    • Measurements demonstrated high precision, with errors comparable to those of a commercial lensometer.
    • The system proved effective in identifying focal planes and determining lens parameters.

    Conclusions:

    • The designed lensometer is a compact, cost-effective, and precise instrument for ophthalmic lens power measurement.
    • Its performance is on par with commercial lensometers, offering a viable alternative.
    • This technology has potential applications in optometry and optical manufacturing.