Impact of Visual Field Restriction on Visual Exploration

Brief Title

Impact of Visual Field Restriction on Visual Exploration

Official Title

Impact de la Restriction du Champ Visuel Sur l'Exploration Visuelle

Brief Summary

      To communicate with the observer and guide his gaze on the canvas, painters have developed
      different stylistic processes that artists, in the manner of scientists, have acquired on the
      functioning of human visual perception. This direct communication between the artist and the
      observer is strongly impacted for people with visual impairments.

      In order to improve the accessibility and autonomy of visually impaired people in museums and
      to allow each observer to feel the visual and emotional experience closest to the original
      work of the artist, it is essential to identify the modifications. perceptive generated by
      the constriction of vision
    

Detailed Description

      In this experiment, the investigators study the adaptive strategies developed by people with
      retinitis pigmentosa in the perception of figurative works of art. Peripheral vision is
      crucial for detecting objects and directing attention to the relevant areas of the
      environment, while central vision, of high spatial resolution, is especially essential for
      identifying the nature of objects. The integration of perceived information in peripheral
      vision and central vision makes it possible to quickly and effortlessly develop a spatial
      representation of the environment, to activate categorical knowledge on the observed scene
      and to relate the various objects perceived. However, with the progressive constriction of
      the visual field, the visual exploration of the subject RP can not be carried out with the
      strategies used by the healthy subjects, in which the targets of the saccades are in
      particular determined according to the information perceived in peripheral vision.

      Through the recording of eye movements, the investigators compare the differences in visual
      explorations of people with retinitis pigmentosa and healthy people with or without a
      simulated deficit.
    


Study Type

Observational


Primary Outcome

Eye movements


Condition

Pigmentary Retinopathy

Intervention

Eye tracker

Study Arms / Comparison Groups

 Healthy volunteers
Description:  Healthy volunteers

Publications

* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.

Recruitment Information


Recruitment Status

Other

Estimated Enrollment

45

Start Date

November 4, 2019

Completion Date

October 17, 2021

Primary Completion Date

September 11, 2020

Eligibility Criteria

        Groupe 1

        Inclusion Criteria:

          -  no visual pathology

          -  Age ≥ 18 and <65 years

          -  Binocular visual acuity ≥8 / 10th or ≤ +0.10 logMAR

          -  Comprehension of the written and spoken French language

          -  Signed consent to participate in the study

          -  Health insurance affiliation

          -  Visit to an ophthalmologist less than a year old

        Exclusion Criteria:

          -  Pregnant or lactating woman

          -  Ocular pathology that may interfere with planned assessments

          -  Treatment that may interfere with planned assessments

          -  Participation in another study that may interfere with this study.

          -  Severe pathology unbalanced or interfering with planned assessments.

          -  Neurological deficit including history of epileptic pathology, photosensitive
             epilepsy, sensory-motor coordination disorders, vestibular or cerebellar pathology

          -  Inability to give consent personally.

          -  Adults protected by law.

        Groupe 2

        Inclusion Criteria:

          -  Retinopathy pigmentary dystrophy rods-cones.

          -  Binocular visual acuity ≥4 / 10 (≤0.4 logMAR).

          -  Horizontal diameter of the residual Goldmann field of view ≤ 25 ° of binocular
             diameter at III4.

          -  Comprehension of the French language, written or oral.

          -  Signed consent

          -  Visual assessment less than 6 months old

        Exclusion Criteria:

          -  Pregnant or nursing woman.

          -  Ocular pathology that may interfere with planned assessments.

          -  Treatment that may interfere with planned assessments.

          -  Severe pathology unbalanced or interfering with planned assessments.

          -  Participation in another study that may interfere with this study.

          -  Neurological deficit including antecedent of epileptic pathology, photosensitive
             epilepsies, non-visual sensory disturbances, motor disorders, or sensorimotor
             coordination disorders, vestibular or cerebellar pathology.

          -  Inability to give consent personally.

          -  Adults protected by law.
      

Gender

All

Ages

18 Years - 65 Years

Accepts Healthy Volunteers

Accepts Healthy Volunteers

Contacts

Avinoam Safran, +33 140021126, [email protected]

Location Countries

France

Location Countries

France

Administrative Informations


NCT ID

NCT04360291

Organization ID

P19-05

Secondary IDs

2019-A01198-49

Responsible Party

Sponsor

Study Sponsor

Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts


Study Sponsor

Avinoam Safran, Principal Investigator, Institut de la vision


Verification Date

April 2020