Comparison of objective accommodation in phakic and pseudophakic eyes between age groups
Graefe's Archive for Clinical and Experimental Ophthalmology Mar 15, 2019
Chung B, et al. - Among 83 participants aged ≥ 40 years with a visual acuity of 20/25 or better, and refractive error < spherical − 1.0 diopters (D) and cylindrical 1.0 D, researchers compared objective accommodation of phakic and pseudophakic eyes between two age groups ie, < 60 years and ≥ 60 years. Four groups were examined: group 1 (pseudophakic, age < 60 years), 2 (pseudophakic, ≥ 60 years), 3 (phakic, < 60 years), and 4 (phakic, ≥ 60 years). Using a binocular open-field autorefractor, they measured objective accommodation and pupil diameter to 2.0- and 3.0-D stimuli. In groups 1, 2, 3, and 4, the respective mean objective accommodation was 0.29 ± 0.47 D, 0.01 ± 0.21 D, 1.00 ± 0.88 D, and 0.01 ± 0.13 to a 2.0-D stimulus, and 0.26 ± 0.51 D, − 0.06 ± 0.21 D, 1.42 ± 1.21 D, and − 0.06 ± 0.21 to a 3.0-D stimulus. In groups 1, 2, 3, and 4, the respective mean pupillary diameter was − 0.5 ± 0.8 mm, − 0.3 ± 0.8 mm, − 0.6 ± 0.5 mm, and − 0.6 ± 0.9 mm to a 2.0-D stimulus, and − 0.6 ± 0.8 mm, − 0.6 ± 0.8 mm, − 0.9 ± 0.5 mm, and − 1.0 ± 1.1 mm to a 3.0-D stimulus. Overall, among relatively young pseudophakic patients, a role of age in objective accommodation was suggested.
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