Materials and Methods: The study included 30 patients who presented to our clinic with senile mature or hypermature cataracts and scheduled for phacoemulsification surgery. Preoperative and in the postoperative 6. weeks, In all patients, anterior segment parameters including anterior chamber depth (ACD), iridocorneal angle (ICA), anterior chamber volume (ACV), central corneal thickness (CCT), corneal volume (CV) and keratometric values (K1, K2, Kmax, anterior and posterior corneal astigmatism) were evaluated at baseline and on week 6 after surgery using Scheimpflug camera system (Sirius Topography, CSO, Italy

Results: When baseline and postoperative ACD, ACV and ICA values were assessed, it was observed that ACD, ACV and ICA were significantly increased (p <0.001 for all values). However, no significant difference was observed in CCT and CV (p = 0.128, p = 0.277, respectively). The mean intraocular pressure (IOP) was 21.47±3.30 mmHg at baseline and 17.77±1.68 mmHg after surgery. A significant reduction was observed in IOP after surgery (p <0.001). When the keratometric values were assessed, it was observed that there was no significant change in K1 and K2 values (p = 0.095, p = 0.895, respectively) but a significant decrease in K max value (p = 0.013). Regarding anterior and posterior corneal astigmatism values, it was found that there was no significant difference in posterior corneal astigmatism (p = 0.161); however, the anterior corneal astigmatism was decreased (p = 0.010).

Conclusion: Mature and hypermature cataract affects the anterior segment structures due to excessive swelling of the crystalline lens, resulting in compression on anterior segment parameters. The compression can be reversed by successful phacoemulsification surgery. The Scheimpflug camera system can document the changes in quantitative manner. Keywords : Anterior segment structures, Corneal topography, Mature cataract, Phacoemulsification, Scheimpflug camera