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

Diurnal visual changes in radial keratotomy: implications for visual standards. Refractive Surgery Study Group

M A Bullimore1, J E Sheedy, D Owen

  • 1School of Optometry, University of California, Berkeley.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|August 1, 1994
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

Abstracts of presentations to the Annual Meetings of the Canadian Society of Colon and Rectal Surgeons Canadian Association of General Surgeons Canadian Association of Thoracic Surgeons: Canadian Surgery Forum, London, Ont., Sept. 19 to 22, 2002.

Canadian journal of surgery. Journal canadien de chirurgie·2023
Same author

NEW DEFINITIVE HOST RECORD FOR CHORDODES MORGANI (NEMATOMORPHA) IN NEBRASKA WITH NOTES ON ECOLOGY.

The Journal of parasitology·2021
Same author

Response to Kibe Y et al. "Methodological concerns for investigating the effects of midtreatment break of stereotactic body radiotherapy (SBRT) for hepatocellular carcinoma (HCC)".

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology·2020
Same author

A mid-treatment break and reassessment maintains tumor control and reduces toxicity in patients with hepatocellular carcinoma treated with stereotactic body radiation therapy.

Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology·2019
Same author

Protocol for a randomized, double blind, placebo controlled, crossover trial of Melatonin for treatment of Nocturia in adults with Multiple Sclerosis (MeNiMS).

BMC neurology·2017
Same author

Decreased hippocampal translocator protein (18 kDa) expression in alcohol dependence: a [<sup>11</sup>C]PBR28 PET study.

Translational psychiatry·2017

Radial keratotomy (RK) patients experience diurnal vision shifts, potentially causing them to fail professional vision tests. Testing vision in both morning and afternoon is recommended for RK patients seeking employment.

Area of Science:

  • Ophthalmology
  • Vision Science
  • Refractive Surgery

Background:

  • Diurnal variations in vision are documented in patients who have undergone radial keratotomy (RK).
  • This visual fluctuation can impact the ability of individuals to meet professional vision standards at different times of the day.

Purpose of the Study:

  • To investigate diurnal changes in visual acuity and contrast sensitivity in patients with a history of radial keratotomy.
  • To determine if these changes affect the ability to meet occupational vision standards.

Main Methods:

  • Compared 10 radial keratotomy (RK) patients and 9 controls over multiple morning and afternoon visits.
  • Measured visual acuity, refraction, keratometry, and contrast sensitivity under various conditions (natural/dilated pupils, glare).

Related Experiment Videos

Main Results:

  • RK patients exhibited a significant myopic shift and corneal steepening from morning to afternoon.
  • Three RK subjects failed the firefighter visual acuity standard during afternoon testing.
  • RK patients showed reduced contrast sensitivity with dilated pupils, especially with glare.

Conclusions:

  • Existing visual standards for professions should incorporate testing in both morning and afternoon for RK patients.
  • Clinicians and employers should recognize that contrast sensitivity can decrease in low light conditions for RK patients.