Random Changes of Accommodation Stimuli: An Automated Extension of the Flippers Accommodative Facility Test

To study the accommodative dynamics for predictable and unpredictable stimuli using manual and automated accommodative facility tests Materials and Methods: Seventeen young healthy subjects were tested monocularly in two consecutive sessions, using five different conditions. Two conditions replicate...

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Bibliographic Details
Published in:Current eye research 2018-06, Vol.43 (6), p.788-795
Main Authors: Otero, Carles, Aldaba, Mikel, López, Silvia, Díaz-Doutón, Fernando, Vera-Díaz, Fuensanta A, Pujol, Jaume
Format: Article
Language:English
Subjects:
Accommodation and refraction
Accommodation, Ocular - physiology
Acomodació i refracció
Adolescent
Adult
Asthenopia - diagnosis
Asthenopia - physiopathology
Ciències de la visió
Eye
Eyestrain
Fatiga ocular
Female
Humans
Lens, Crystalline - physiopathology
Male
Myopia - diagnosis
Myopia - physiopathology
Optometria
Photic Stimulation
Presbyopia - diagnosis
Presbyopia - physiopathology
Ulls
Vision Tests
Vision, Binocular - physiology
Young Adult
Àrees temàtiques de la UPC
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Summary:To study the accommodative dynamics for predictable and unpredictable stimuli using manual and automated accommodative facility tests Materials and Methods: Seventeen young healthy subjects were tested monocularly in two consecutive sessions, using five different conditions. Two conditions replicated the conventional monocular accommodative facility tests for far and near distances, performed with manually held flippers. The other three conditions were automated and conducted using an electro-optical system and open-field autorefractor. Two of the three automated conditions replicated the predictable manual accommodative facility tests. The last automated condition was a hybrid approach using a novel method whereby far and near-accommodative-facility tests were randomly integrated into a single test of four unpredictable accommodative demands. The within-subject standard deviations for far- and near-distance-accommodative reversals were (±1,±1) cycles per minute (cpm) for the manual flipper accommodative facility conditions and (±3, ±4) cpm for the automated conditions. The 95% limits of agreement between the manual and the automated conditions for far and near distances were poor: (-18, 12) and (-15, 3). During the hybrid unpredictable condition, the response time and accommodative response parameters were significantly (p 
ISSN:0271-3683
1460-2202
DOI:10.1080/02713683.2018.1444181