An observational study in Vision Loss Night, sponsored by Direction Centrale du Service de Santé des Armées. Completed at 1 site in France. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2022-09-13.
Sponsored by Direction Centrale du Service de Santé des Armées · Observational
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.
67 studies on the registry are indexed under Vitamin A Deficiency; 7 are open to participants now.
This study's enrollment of 17 is below the median of 258 across 17 observational studies indexed under Vitamin A Deficiency.
Browse Vitamin A Deficiency studies →Direction Centrale du Service de Santé des Armées is the lead sponsor of 95 studies on the registry; 33 are open to participants now.
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Healthy adults
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Exclusion Criteria:
Questionnaire about habits in terms of near vision activities
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
Maximum convex equivalent sphere values
Maximum convex equivalent sphere values obtained by the different refraction procedures under study.
Time frame: At visit 1 (day 1)
High contrast monocular acuity values
High contrast monocular acuity values obtained by the different refraction procedures.
Time frame: At visit 1 (day 1)
Low contrast monocular acuity values
Low contrast monocular acuity values obtained by the different refraction procedures.
Time frame: At visit 1 (day 1)
High contrast binocular acuity values
High contrast binocular acuity values obtained by the different refraction procedures.
Time frame: At visit 1 (day 1)
Low contrast binocular acuity values
Low contrast binocular acuity values obtained by the different refraction procedures.
Time frame: At visit 1 (day 1)
Difference between binocular perceptual assessment scores before and after subjective adjustment
Difference between binocular perceptual assessment scores obtained by the different refractive procedures before and after subjective adjustment. Binocular perceptual assessment score will be obtained using visual analogue faces. The score will range from "excellent comfort" to "unbearable".
Time frame: Difference between visit 1 (day 1) and visit 2
Plan to share: Undecided
No publications or documents are linked to this record.
Ran from Mar 2021 to primary completion in May 2021, 1 month.
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This study is completed, as verified in Sep 2022. You cannot join it, but the record below documents what was studied.
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Direction Centrale du Service de Santé des Armées