Effect Of 1.8Mm Temporal Clear Corneal Incision On Posterior Cornea Surgically Induced Astigmatism.

Published 2022 - 40th Congress of the ESCRS

Reference: FPS04.06 | Type: Free paper | DOI: 10.82333/kp0f-9014

Authors: Jack Kane* ¹ , Michael Goggin ¹ , Ben LaHood ¹

¹Ophthalmology,The Queen Elizabeth Hospital,Adelaide,Australia

Purpose

To assess the effect of cataract surgery on the posterior corneal astigmatism measured by the IOLMaster 700 using a 1.8 mm temporal clear corneal incision.

Setting

The Queen Elizabeth Hospital, Adelaide.

Methods

Biometry measurements were taken preoperatively and 6 weeks post-operatively for consecutive patients using the IOLMaster 700. Using vector analysis, the SIA of the posterior cornea was calculated.

Results

426 eyes of 342 patients were included in the analysis. The mean pre-operative posterior corneal astigmatism was 0.21 D ± 0.16 D. The centroid of the preoperative PCA was 0.09 D@102 ± 0.25 D.

The mean postoperative corneal astigmatism was 0.21 D ± 0.15 D. The centroid of the postoperative PCA was 0.07 D@104 ± 0.24 D.

The mean posterior corneal SIA was 0.13 D ± 0.08 D. The centroid of the posterior corneal SIA was 0.01 D@3 ± 0.15 D. 93% of patients had a magnitude of posterior corneal SIA of <=0.25 D and 99.5% had a magnitude of posterior corneal SIA of <=0.50 D.

Conclusions

There was no significant change in the centroid of the posterior corneal SIA when using a 1.8mm temporal CCI.