Analysis of clinical efficacy of Toric intraocular lens guided by corneal topography

AIM:To investigate the function of Pentacam in accurately selecting the model and axial position of Toric artificial lens. METHODS: Totally 53 eyes of 46 cataract patients who were scheduled to receive phacoemulsification from January 2018 to December 2018 were selected in our hospital. Before the operation, corneal astigmatism was greater than 1.0D according to the examination results by AL-Scan and automatic corneal curvature instrument, and Pentacam was used to evaluate the corneal astigmatism to guide the accurate selection of Toric IOL model and the axial position to be implanted. Surgery was done by the same doctor. After operation, the patients were traced and visited for 3mo to collect the uncorrected visual acuity(UCVA), the best corrected visual acuity(BCVA), the whole-eye astigmatism, the corneal curvature and target induced astigmatism(TIA)before and after the operation as well as the postoperative astigmatism, the rate not relying on the glasses, visual quality assessment and so on. RESULTS: There was no obvious change on patients' corneal astigmatism before and after the operation. The whole-eye astigmatism was reduced and UCVA and BCVA were obviously improved. The difference was statistically meaningful(P0.05). The rate of distant vision defecation and visual quality were significantly improved. CONCLUSION: Pentacam can evaluate the corneal astigmatism more comprehensively and accurately, which is helpful to guide the accurate selection of Toric artificial lens model, and to improve the postoperative expected effect.