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

Testing the FOCOMETER--A new refractometer

I B Berger1, L A Spitzberg, J Nnadozie

  • 1College of Optometry, University of Houston, Texas.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|April 1, 1993
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

From gut to brain: effects of fecal microbiota transplants from humans to rats on hippocampal gene regulation - a study on anorexia nervosa.

Translational psychiatry·2026
Same author

Allergic Reaction to Alteplase Dwell in Chronic Automated Red Cell Exchange Patient.

Journal of clinical apheresis·2025
Same author

Parent-Reported Usability of a Patient Portal-Based Asthma Care Tool for Parents of Children With Asthma.

Pediatric pulmonology·2025
Same author

HLA-E and NKG2A Mediate Resistance to BCG Immunotherapy in Non-Muscle-Invasive Bladder Cancer.

bioRxiv : the preprint server for biology·2024
Same author

Impact of Frailty on Gait Speed Improvements in Home Health after Hospital Discharge: Secondary Analysis of Two Randomized Controlled Trials.

The Journal of frailty & aging·2024
Same author

Harnessing the Near-Peer Effect in Anatomy Education.

Medical science educator·2023
Same journal

Comparison of neutralization and disinfection kinetics in povidone iodine- and hydrogen peroxide-based soft contact lens care solutions.

Optometry and vision science : official publication of the American Academy of Optometry·2026
Same journal

Agreement between ganglion cell-inner plexiform layer metrics from widefield optical coherence tomography and Goldmann II, III, and V in glaucoma.

Optometry and vision science : official publication of the American Academy of Optometry·2026
Same journal

Repeatability of SpotChecks contrast sensitivity test in macular disease.

Optometry and vision science : official publication of the American Academy of Optometry·2026
Same journal

Reflections on emerging therapies for inherited retinal diseases following a community education event: A qualitative exploration.

Optometry and vision science : official publication of the American Academy of Optometry·2026
Same journal

Optical myopia control interventions: Evaluation of methods and success in a real-world population.

Optometry and vision science : official publication of the American Academy of Optometry·2026
Same journal

Influence of corneal endothelial cell density after penetrating keratoplasty on contact lens induced corneal swelling.

Optometry and vision science : official publication of the American Academy of Optometry·2026
See all related articles

The FOCOMETER offers a simple way to measure refractive errors for underserved populations. Its readings closely match standard methods, making it a viable tool for accessible vision care.

Area of Science:

  • Ophthalmology
  • Optometry
  • Medical Devices

Background:

  • Access to accurate refractive error measurement is limited in rural and low-income areas.
  • Existing optometry equipment is often expensive, requires electricity, and involves complex procedures.

Purpose of the Study:

  • To evaluate the accuracy of the FOCOMETER, a novel device for measuring spherical refractive errors.
  • To determine the FOCOMETER's suitability for providing spherical prescriptions in resource-limited settings.

Main Methods:

  • Compared FOCOMETER readings with autorefraction and subjective refraction in children.
  • Compared FOCOMETER readings with retinoscopy in adults.
  • Tested the device across a refractive error range of -4 to +5 Diopters.

Related Experiment Videos

Main Results:

  • FOCOMETER readings were within 0.5 Diopters of autorefraction and retinoscopy.
  • The difference between FOCOMETER and subjective refraction was approximately 0.1 Diopters.
  • The device demonstrated reasonable accuracy across the tested refractive error range.

Conclusions:

  • The FOCOMETER provides accurate spherical refractive error measurements.
  • It is a promising, low-cost, and electricity-independent tool for vision screening in underserved populations.
  • The FOCOMETER can facilitate accessible prescription of eyeglasses in remote areas.