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

Accuracy analysis in laser keratopography.

Manuel Campos-García1, Rufino Díaz-Uribe

  • 1Laboratorio de Optica Aplicada, Centro de Instrumentos, Universidad Nacional Autonoma de Mexico, Mexico City Distrito Federal, Mexico. camposm@aleph.cinstrum.unam.mx

Applied Optics
|April 9, 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

Evaluation of concave seismic isolator surfaces using LCD null-screens.

Applied optics·2026
Same author

Evaluation of the aspherical surface of a plano-convex lens by refraction using an LCD.

The Review of scientific instruments·2024
Same author

Modeling, fabrication, and metrology of 3D printed Alvarez lenses prototypes.

Optics express·2024
Same author

Fabrication of biconvex spherical and aspherical lenses using 3D printing.

Applied optics·2023
Same author

Smartphone-based corneal topography with null-screens.

Applied optics·2022
Same author

Null screens to evaluate the shape of freeform surfaces: progressive addition lenses.

Optics express·2021

Laser keratography accurately maps corneal topography on non-smooth surfaces with minimal noise. Reliable accuracy is achieved when surface deformation ratios are below 0.02 and positional detection errors are under 0.5 mm.

Area of Science:

  • Ophthalmology
  • Optical Engineering
  • Biomedical Imaging

Background:

  • Corneal topography is crucial for diagnosing and managing various eye conditions.
  • Assessing non-smooth corneal surfaces presents challenges for traditional topographic devices.
  • Laser keratography offers a potential method for detailed corneal surface evaluation.

Purpose of the Study:

  • To evaluate the accuracy of laser keratography for non-smooth corneal surfaces.
  • To investigate the impact of noise on measured corneal topography data.
  • To determine the acceptable limits for surface deformations and detection errors.

Main Methods:

  • Numerical simulations were employed to model theoretical corneal surfaces.
  • Cosinesoidal deformations of varying amplitudes and spatial periods were introduced.

Related Experiment Videos

  • Gaussian noise was simulated for positional coordinates to mimic detection errors.

    • Main Results:

    • Reliable corneal topography accuracy was achieved when the height-to-width ratio of surface deformations was less than 0.02.
    • Accuracy was maintained when positional detection errors at the sensor were below 0.5 mm.
    • The study quantifies the tolerance of laser keratography to surface irregularities and noise.

    Conclusions:

    • Laser keratography demonstrates robust accuracy in evaluating non-smooth corneal topography.
    • The findings provide critical parameters for the clinical application of laser keratography.
    • This technology shows promise for improved diagnosis and treatment planning in ophthalmology.