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Comparative Study
. 2014 Jun;62(6):683-7.
doi: 10.4103/0301-4738.126990.

Comparing measurement techniques of accommodative amplitudes

Hamed Momeni-Moghaddam  1 , James Kundart, Farshad Askarizadeh
Affiliations
Comparative Study

Comparing measurement techniques of accommodative amplitudes

Hamed Momeni-Moghaddam et al. Indian J Ophthalmol. 2014 Jun.

Abstract

Aim and background: This study was designed to compare four standard procedures, for determining the monocular accommodative amplitudes.

Materials and methods: Fifty-two students participated in this analytical-descriptive study. Accommodative amplitudes were measured using four common clinical techniques, namely: Push-up, push-down, minus lens, and modified push-up.

Results: The highest amplitude was obtained using the push-up method (11.21 ± 1.85 D), while the minus lens technique gave the lowest finding (9.31 ± 1.61 D). A repeated-measures Analysis of Variance (ANOVA) showed a significant difference between these methods (P < 0.05), further analysis showed that this difference was only between the minus lens and other the three methods (the push-up (P < 0.001), the push-down (P < 0.001) and the modified push-up (P < 0.001)). The highest and the lowest mean difference was related to the push-up with the minus lens, and the push-down with the modified push-up, while the highest and the lowest 95% limits of agreement were related to the push-up with the modified push-up and the push-up with the push-down methods. There was almost a perfect agreement between the push-up and the push-down method, whereas, a poor agreement was present between the modified push-up and the minus lens technique, and a fair agreement existed between the other pairs.

Conclusions: The quick and easy assessment of the amplitude using the push-up and the push-down methods compared to other methods, and the obtained perfect agreement between these two methods can further emphasize their use as a routine procedure in the clinic, especially if a combination of the two techniques is used to offset their slight over- and underestimation.

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Conflict of interest statement

Conflict of Interest: None declared

Figures

Figure 1
Figure 1
Agreement rate of the push-up method with the push-down (a), the minus lens (b), the modified push-up (c) techniques in determination of the accommodative amplitude associated with 95% CI for difference
Figure 2
Figure 2
Agreement rate of the push-down method with the the modified push-up (a), the minus lens (b) techniques in determination of the accommodative amplitude associated with 95% CI for difference
Figure 3
Figure 3
Agreement rate of the modified push-up method with the minus lens technique in determination of the accommodative amplitude associated with 95% CI for difference
See this image and copyright information in PMC

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