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

Management of keratoconus: comparative visual assessments.

L G Carney1, R G Lembach

  • 1College of Optometry, Department of Ophthalmology, Ohio State University, Columbus 43210.

The CLAO Journal : Official Publication of the Contact Lens Association of Ophthalmologists, Inc
|January 1, 1991
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

The effects of fenestrating soft contact lenses on corneal swelling: a re-examination.

Clinical & experimental optometry·2013
Same author

Flexure of thin rigid contact lenses.

Contact lens & anterior eye : the journal of the British Contact Lens Association·2005
Same author

Hyperopia is predominantly axial in nature.

Current eye research·1998
Same author

Corneal topography and myopia. A cross-sectional study.

Investigative ophthalmology & visual science·1997
Same author

Rigid lens dynamics: lid effects.

The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, Inc·1997
Same author

The influence of center of gravity and lens mass on rigid lens dynamics.

The CLAO journal : official publication of the Contact Lens Association of Ophthalmologists, Inc·1996

This study compared visual performance in keratoconus patients using RGP lenses, penetrating keratoplasty, or epikeratoplasty. Epikeratoplasty yielded the poorest results, while penetrating keratoplasty was most affected by glare.

Area of Science:

  • Ophthalmology
  • Vision Science
  • Corneal Surgery

Background:

  • Keratoconus is a progressive corneal disease affecting visual acuity.
  • Various methods, including rigid gas permeable (RGP) lenses, penetrating keratoplasty (PK), and epikeratoplasty (EPI), are used to correct vision in keratoconus patients.
  • Objective comparison of visual performance across these correction methods is crucial for patient management.

Purpose of the Study:

  • To compare the visual performance of keratoconus patients corrected with RGP lenses, penetrating keratoplasty, or epikeratoplasty.
  • To evaluate the impact of glare on visual performance in these patient groups.
  • To establish a hierarchy of visual quality provided by different keratoconus management strategies.

Main Methods:

  • Visual performance was assessed using contrast thresholds for sinusoidal gratings.

Related Experiment Videos

  • Contrast thresholds were measured under both standard and glare conditions.
  • Statistical analysis (ANOVA) was employed to compare outcomes across the three correction groups (RGP, PK, EPI).

    • Main Results:

    • Significant differences in visual performance were observed among the RGP, PK, and EPI groups (P = 0.0059).
    • Epikeratoplasty resulted in the poorest visual performance compared to RGP lenses and penetrating keratoplasty.
    • Penetrating keratoplasty eyes showed the greatest decline in visual performance under glare conditions (P = 0.0014), particularly at medium spatial frequencies.

    Conclusions:

    • The choice of visual correction significantly impacts visual performance in keratoconus patients.
    • Epikeratoplasty is associated with inferior visual outcomes.
    • Penetrating keratoplasty, while effective, renders patients more susceptible to visual disturbances caused by glare.