MedTrace Logo

Comparison of Different Refraction Measurements in Adults

NCT04434521 · Status: COMPLETED · Type: OBSERVATIONAL · Enrollment: 17

Last updated 2022-09-13

No results posted yet for this study

Summary

The combatant is likely to carry out missions any time, any place, day or night. The very strong degradation of natural vision performance in these conditions justifies the use of visual replacement means, based on optronic sensors whose sensitivity is more adapted to these luminous environments than that of the human eye.

The duration and repetition of missions carried out with night vision sensors lead to visual complaints from users.

The literature on night vision binoculars adjustment states that a binocular adjustment of the equipment provides more convex settings. The latter would then limit the strain on the accommodative component, which is one of the possible sources of operator visual fatigue. In order to allow a more appropriate adjustment, it is proposed to rely on a measurement of the refraction (optical defect of the eye) of each operator. Like binocular adjustments, binocular refractive methods would limit accommodative stimulation and thus visual fatigue. However, these methods are little used in favour of conventional methods. It is therefore necessary to evaluate the interest of binocular refraction for the adjustment of night vision binoculars.

The purpose of this study is to compare refraction measurements by procedure in adult subjects free of ophthalmological disorders.

Conditions

  • Vision Loss Night

Interventions

BEHAVIORAL

Questionnaire

Questionnaire about habits in terms of near vision activities

OTHER

Eye examination

The eye examination involves the following measurements: * Distant vision phoria with Thorington method * Close vision with Thorington method * Objective eye-to-eye refraction with self-refractometer * Binocular objective refraction with autorefractometer * Monocular/biocular/binocular refraction with Nidek TS610 * SiView automatic refraction * Humphriss binocular refraction * MOU Binocular refraction

Sponsors & Collaborators

  • Direction Centrale du Service de Santé des Armées

    lead OTHER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2021-03-05
Primary Completion
2021-05-03
Completion
2021-05-03

Countries

  • France

Study Locations

More Related Trials

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT04434521 on ClinicalTrials.gov