Accommodation in phakic and pseudophakic eyes measured with subjective and objective methods

Nemeth, Gabor and Lipecz, Agnes and Szalai, Eszter and Berta, Andras and Modis, Laszlo (2013) Accommodation in phakic and pseudophakic eyes measured with subjective and objective methods. Journal of Cataract and Refractive Surgery, 39 (10). pp. 1534-42. ISSN 0886-3350, ESSN: 1873-4502

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Abstract

PURPOSE To measure accommodation subjectively and objectively and assess anterior segment changes during accommodation in phakic eyes and pseudophakic eyes. SETTING Department of Ophthalmology, Medical Health and Science Centre, University of Debrecen, Debrecen, Hungary. DESIGN Case series. METHODS Subjective and objective accommodation measurements and pupillometry were performed in phakic and pseudophakic patients. Refraction and pupil diameter were recorded with different accommodation stimuli. Corneal higher-order aberrations (HOAs) and anterior chamber depths (ACDs) were detected with a rotating Scheimpflug camera. RESULTS The mean age of the 44 patients in the phakic group was 36.34 years ± 16.6 (SD) and of the 27 patients in the pseudophakic group, 69.3 ± 9.98 years. The mean subjective accommodation was 4.49 ± 3.48 diopters (D) in phakic eyes and showed significant correlation with age, spherical aberration, changes in pupil diameter, and ACD. The mean subjective accommodation was 0.50 ± 0.28 D in pseudophakic eyes. In phakic eyes, the mean objective accommodation was 0.46 ± 1.02 D, 1.06 ± 1.33 D, and 2.2 ± 1.9 D with 2.0 D, 3.0 D, and 5.0 D, respectively, of stimulus. In pseudophakic eyes, measurable objective accommodation was recorded. In phakic eyes, the correlations were significant between these values and age, changes in ACD, pupil size, and corneal spherical aberration. In pseudophakic eyes, the only correlation was with the spherical equivalent value. CONCLUSIONS The magnitude of accommodation was greater with subjective measures than objective measures. In pseudophakic eyes, senile miosis and HOAs can be regarded as underlying factors in subjective accommodation; however, objective accommodation is not clinically significant. FINANCIAL DISCLOSURE No author has a financial or proprietary interest in any material or method mentioned.

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