Measuring the accommodative response with a double-pass system: Comparison with the Hartmann-Shack technique

► Accommodative response was measured with double-pass and Hartmann-Shack systems. ► No significant differences were found among metrics. ► No significant differences were found in the results obtained with both techniques. ► Slightly higher accommodative responses than those previously published we...

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Bibliographic Details
Published in:Vision research (Oxford) 2012-06, Vol.62, p.26-34
Main Authors: Aldaba, M., Vilaseca, M., Díaz-Doutón, F., Arjona, M., Pujol, J.
Format: Article
Language:English
Subjects:
Accommodation
Accommodation and refraction
Accommodation, Ocular - physiology
Accommodative error
Accommodative response
Acomodació i refracció
Adult
Ciències de la visió
Crystalline lens
Diagnostic Techniques, Ophthalmological
Double-pass technique
Eye
Female
Hartmann-Shack technique
Humans
Male
Myopia - physiopathology
Optometria
Prospective Studies
Refraction, Ocular - physiology
Retina
Retinal image quality
Ulls
Young Adult
Àrees temàtiques de la UPC
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Summary:► Accommodative response was measured with double-pass and Hartmann-Shack systems. ► No significant differences were found among metrics. ► No significant differences were found in the results obtained with both techniques. ► Slightly higher accommodative responses than those previously published were found in this study. ► Double-pass might be a helpful tool for accommodative response measurement based on retinal image quality. The current study aims at analysing the suitability of the double-pass technique in measuring the accommodative response. A custom-built setup which allowed simultaneous double-pass and Hartmann-Shack measurements was used. Several metrics to assess the accommodative response were tested and compared. In order to validate double-pass based measurements, the accommodative response was measured in 10 young adults under monocular viewing conditions with an open field fixation test. Accommodation was stimulated with the push up method in the 0–5diopters (D) range with a 1-D step. We found no significant differences among accommodative response measurements obtained with the several metrics compared in the double-pass and the Hartmann-Shack technique. In addition, differences between the double-pass and Hartmann-Shack techniques were not statistically significant. However, we obtained slightly higher values in the measured accommodative response with the double-pass system than those usually reported by other authors. The double-pass technique takes into account all factors influencing retinal image quality. Consequently, we consider this technique as a potential powerful candidate for the analysis of accommodation.
ISSN:0042-6989
1878-5646
DOI:10.1016/j.visres.2012.03.021