Abstract
Purpose: To evaluate the effect of toric intraocular lens implantation in cataract patients with irregular corneal steep and flat meridian. Methods: Data of 112 eyes of 78 patients who underwent toric intraocular lens implantation were analyzed retrospectively. Steep meridian deviations (not 180 degrees) and steep and flat meridian deviations (not 90 degrees) were classified as 0, 1~9, 10~19, 20~29, 30~39, and over 30 degrees. Meridian deviation was measured with Sagittal map of rotating Scheimpflug camera (Pentacam®: Oculus, Wetzlar, Germany) using PicPickTools (NGWIN, Seoul, Korea). Results: Residual astigmatism (D) of the 0 (0.48±0.12, 0.53±0.12) and the 1~9 (0.59±0.15, 0.63±0.17) were significantly lower than those of 10~19 (0.85±0.21, 0.85±0.26), 20~29 (0.96±0.31, 0.99±0.34), and over 30 degrees groups (1.06±0.36, 1.02±0.38) both in steep meridian deviations and horizontal and vertical meridian deviations at 2 months (P< 0.05). Postoperative mean UCVA (logMAR) of 0 (0.08±0.03, 0.08±0.03) (logMAR) and 1~9 (0.09 ± 0.04, 0.08 ± 0.04) were significantly improved compared to those of 10~19 (0.13±0.04, 0.15±0.05), 20~29 (0.16±0.05, 0.17±0.05), and over 30 degrees groups (0.19±0.07, 0.18±0.06) both in steep meridian deviations and horizontal and vertical meridian deviations (P< 0.05).Conclusions: Correction of astigmatism with toric intraocular lens implantation is not accurate in cornea with steep meridian deviations and steep and flat meridian deviations of more than 10 degrees. Therefore, care should be taken when we perform toric intraocular lens implantation in patients with irregular corneal meridian.