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A standard low toric IOL for eyes with no or low astigmatism

Poster Details

First Author: O.Reitblat ISRAEL

Co Author(s):    A. Levy   G. Kleinmann   E. Assia              

Abstract Details


To evaluate the theoretical visual outcomes following a simulated implantation of a standard 0.75 diopters (D) toric intraocular lens (IOL) in eyes with low or no astigmatism, which would usually not be implanted with a toric lens.


Ein Tal Eye Center, Tel Aviv, Israel.


Consecutive cases of eyes, that had undergone cataract surgery with an implantation of one model of hydrophilic multifocal IOL by a single surgeon, were enrolled. Based on the postoperative residual astigmatism, a low toric correction of 0.75 D was applied in all cases using the meridional analysis method. An algorithm for an automated selection of the optimal axis of implantation for the cylinder correction of 0.75 D was developed. Simulated residual refraction was calculated for the theoretical toric IOL for each eye. The results were compared with actual residual astigmatism measured at the subjective refraction examination.


Data from 100 eyes were evaluated. Implantation of the 0.75 D toric IOLs led to a lower median absolute residual astigmatism and a lower mean centroid residual astigmatism compared with the non-toric IOLs (0.24 D vs. 0.50 D, P < .001 and 0.05 D @ 4° vs. 0.30 D @ 13°, P < .001 [x-axis], P < .001 [y-axis], respectively). The percentage of eyes with a clinically significant residual astigmatism (> 0.75 D) was reduced from 19% to 3% with the application of the 0.75 D toric IOL (P = .006).


Our simulation suggests that implantation of a standard 0.75 D toric IOL may yield reductions in the residual cylinder achieved with the non-toric IOL. The low power toric lens may reduce the overall low pre-existing astigmatism and the surgically induced astigmatism. Adopting this lens as a routine practice may further contribute to modern cataract surgery results.

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