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WR Raymond, CS Otto, JR Minarcik, SC Schallhorn, VC Parmley, RK George, RA Mazzoli, AJ Apodaca; The Measurement of Accommodation Using Wavefront Technology . Invest. Ophthalmol. Vis. Sci. 2002;43(13):200.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To compare accommodation measured by manual addition of spheres and wavefront technology. Methods: Accommodation in both eyes of ten healthy subjects with an overall spherical equivalent of -0.43 diopters (D), an average age of 28.6 years, and near equal sex distribution was measured using both manual addition of spheres and the Wavefront Sciences® wavefront device supplied by Asclepion®. Measurements of accommodation by manual and wavefront methods were compared, along with analysis of changes in pupil size and overall refraction during wavefront measurements. Results: The correlation coefficient between manual versus wavefront methods was 0.80. The slope of the linear regression was 0.34. Comparison of baseline and maximum accommodation measurements showed an overall change in pupil size and spherical equivalent of 2.09 mm and 3.42 D, respectively. Conclusion: Measurements of accommodation with wavefront technology showed good correlation with manual measurements, but consistently underestimated accommodation compared with manual technique. This discrepancy may be secondary to the inability of the wavefront fixation target to stimulate full accommodative effort. Modifications to wavefront device targets may be necessary to allow for more accurate and reproducible measurements of accommodation. A decrease in pupil size is correlated with accommodation but is not a good indicator of maximum accommodative effort.
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