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

Improving vision: neural compensation for optical defocus

M Mon-Williams1, J R Tresilian, N C Strang

  • 1Department of Human Movement Studies, University of Queensland, St Lucia, Australia. markmw@hms.uq.edu.au

Proceedings. Biological Sciences
|February 21, 1998
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

A national survey on the availability of prefilled medication syringes and medication errors in maternity units across the United Kingdom.

International journal of obstetric anesthesia·2022
Same author

microRNA signatures associated with fetal growth restriction: a systematic review.

European journal of clinical nutrition·2021
Same author

Placental expression of miR-21-5p, miR-210-3p and miR-141-3p: relation to human fetoplacental growth.

European journal of clinical nutrition·2021
Same author

Placental expression of RNU44, RNU48 and miR-16-5p: stability and relations with fetoplacental growth.

European journal of clinical nutrition·2021
Same author

Placental expression of leptin: fetal sex-independent relation with human placental growth.

European journal of clinical nutrition·2020
Same author

Intrapartum spontaneous pneumomediastinum with subcutaneous emphysema - Management and recommendations to prevent recurrence in future pregnancies.

International journal of obstetric anesthesia·2019
Same journal

Chronic limb loading results in remarkable load carriage economy in growing fowl.

Proceedings. Biological sciences·2026
Same journal

Motion-from-structure in face perception: expectations of natural face motion depend on face shape.

Proceedings. Biological sciences·2026
Same journal

Unification and generalization of models of zygote survival.

Proceedings. Biological sciences·2026
Same journal

Phenological type- and diameter-dependent effects of individual light availability and interannual climate variation on tree growth.

Proceedings. Biological sciences·2026
Same journal

Interaction range of common goods shapes Black Queen dynamics beyond the cheater-cooperator narrative.

Proceedings. Biological sciences·2026
Same journal

Stingray spine diversity reflects performance trade-offs linked to puncture and breakability.

Proceedings. Biological sciences·2026
See all related articles

Vision can improve without glasses due to neural compensation for blur. Prolonged optical defocus enhances letter detection and recognition, suggesting the brain adapts to improve sight.

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Visual Perception

Background:

  • Anecdotal evidence suggests vision improvement in myopia after periods without corrective lenses.
  • The underlying mechanism remains unclear, with possibilities including increased blur tolerance or genuine visual enhancement.

Purpose of the Study:

  • To investigate whether vision improvement after uncorrected myopia is due to enhanced blur tolerance or actual visual acuity changes.
  • To explore the neural mechanisms behind visual adaptation to optical defocus.

Main Methods:

  • Experiments involved prolonged exposure to optical defocus without refractive correction.
  • Letter detection and recognition abilities were measured.
  • Contrast sensitivity was assessed at various spatial frequencies (cycles per degree).

Related Experiment Videos

  • Inter-ocular transfer was examined to localize adaptation sites.

    • Main Results:

    • A significant improvement in letter detection and recognition was observed after optical defocus exposure.
    • No ophthalmic changes occurred, indicating neural compensation.
    • Contrast sensitivity decreased in mid-range spatial frequencies (5-25 cycles/degree).
    • Evidence of inter-ocular transfer suggests cortical adaptation.

    Conclusions:

    • Prolonged optical defocus leads to neural compensation, improving visual performance.
    • A two-stage process involving channel output maintenance and pooling explains the observed effects.
    • Adaptation to optical defocus likely occurs at binocular sites within the cortex.