The aim of this study was to investigate the distribution of higher-order aberrations (HOAs) of the anterior cornea of eyes with cataract in a senior Chinese population and their correlations with age.
Four hundred ten Chinese patients (male/female: 196/214; age: 67.9 ± 10.0 years) with cataract were categorized into 5 groups according to their age. The HOAs in the central 6-mm zone of the cornea were measured with an iTrace wavefront analyzer. The correlations between age and total HOA, coma aberration, trefoil aberration, and spherical aberration were assessed using Spearman analysis. The differences in total HOA, coma aberration, trefoil aberration, spherical aberration among various age groups were analyzed using the Kruskal–Wallis H test.
The corneal HOA exhibited a nonnormal distribution. A weak correlation was found between age and total HOA, coma aberration (Z 3 ±1), trefoil aberration (Z3 ±3) (P < 0.001 for all). No correlation was found between age and spherical aberration (Z4 0). Differences in the root mean square of the total HOA, Z3 ±1, and Z3 ±3 were found among various age groups (P < 0.05). No difference was found in the root mean square of Z4 0, spherical diopter, corneal curvature, corneal astigmatism, corneal effective refractive power, corneal asphericity Q value and corneal central power across the groups.
The distribution of anterior corneal HOAs of eyes with cataract in a senior Chinese population is of the nonnormal type. The total HOA, Z3 ±1, and Z3 ±3 are correlated to age, unlike Z4 0 of the anterior cornea.
*Department of Cataract at Clinical College of Ophthalmology, Tianjin Medical University, Tianjin, China;
†Department of Cataract at Tianjin Eye Hospital, Tianjin, China;
‡Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin, China;
§Department of Ophthalmology at Tianjin Nankai Hospital, Tanjin, China; and
¶Tianjin Eye Institute, Tianjin, China.
Reprints: Xin Tang, Department of Cataract at Clinical College of Ophthalmology, Tianjin Medical University, No. 4 Gansu Rd, Heping District, Tianjin 300020, China (e-mail: email@example.com).
The authors have no funding or conflicts of interest to disclose.
Received October 13, 2013
Accepted January 22, 2014