Quantitative Evaluation of Changes In Aberrations And Anterior Segment Biometry By Phacoemulsification And Intraocular Lens Implantation Using Newly Developed Pentacam HR

1. Ying Lin
2. Yizhi Liu
3. Xialin Liu
4. Yao Ni
5. Lixia Luo
6. Jing Yang

Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China

Purpose: This study set out to evaluate the influences of uneventful phacoemulsification with intraocular lens implantation (IOL) on the anterior segment parameters obtained with the newly developed high-resolution (HR) Pentacam Scheimpflug camera in a healthy population.

Material and Methods: In a prospective study, we evaluated 34 eyes of 34 healthy patients having cataract phacoemulsification and intraocular lens implantaion. We performed Pentacam HR measurements preoperatively and at 1 week after surgery. A paired t-test was used to compare preoperative and 1 week postoperative measurements of analysed area (AA), cornea curvature (CC), anterior chamber depth (ACD), anterior chamber volume (ACV), anterior chamber angle (ACA) width, corneal thickness (CT), corneal volume (CV) and total aberrations (Cornea). We compared the postoperative values against the respective preoperative values with SPSS 13.0.

Results: The differences between CC, CT, ACD, ACV, ACA and CV values taken preoperatively and those taken postoperatively at 1 week were statistically significant (p < 0.05). The differences in AA, RPI Min and RPI Max measurements were not statistically significant (p > 0.05). The differences between pre- and postoperative aberrations measurements were statistically significant in RMS (root mean square, CB), RMS HOA (higher-order aberrations, CB), RMS HOA (Cornea), Z 0 0 (CB), Z 0 0 (Cornea), Z 1 -1 (CB), Z 2 -2 (CB), Z 2 0 (CB), et al.

Conclusions: Uneventful phacoemulsification increased CT, CV, ACD,ACV and some above mentioned aberration values, and widened the ACA. However, alterations in AA and some other aberrations remained stable after the first week of surgery.