ESCRS - PP20.07 - Toric Iol Calculation Based On Total Corneal Power Of Central 4.5Mm As Measured By Scheimpflug Tomography(St) And The Hoffer-Q(Hq) For Under 25Mm Axial Length And Holliday I (H1)For Over 25Mm Formulas

Toric Iol Calculation Based On Total Corneal Power Of Central 4.5Mm As Measured By Scheimpflug Tomography(St) And The Hoffer-Q(Hq) For Under 25Mm Axial Length And Holliday I (H1)For Over 25Mm Formulas

Published 2023 - 41st Congress of the ESCRS

Reference: PP20.07 | Type: Free paper | DOI: 10.82333/f6wv-yh10

Authors: Dimitrios Machairas 1 , Anastasios J. Kanellopoulos 2 , Eleni Konstantinidou 3 , Despoina Karadimou* 3 , Athanasios Zisimopoulos 4 , Alexandros John Kanellopoulos 3 , Niki Tsirimpari 5 , Vasiliki Moustou 5

1Ophthalmology,LaserVision Ambulatory Eye Surgery Unit,Athens ,Greece, 2Ophthalmology,LaserVision Ambulatory Eye Surgery Unit,Athens,Greece;Ophthalmology,NYU Med School,New York,United States, 3Ophthalmology,LaserVision Ambulatory Eye Surgery Unit,Athens,Greece, 4LaserVision Ambulatory Eye Surgery Unit,Athens,Greece, 5LaserVision Ambulatory Eye Surgery Unit,Athens ,Greece

Purpose

Consecutive case series evaluating toric IOL calculation based of ST data and aiming for 0.5D with-the-rule (WTR) postop astigmatism

Setting

The Laservision Clinical and Research Institute, Athens, Greece

Methods

505 consecutive cataract cases were calculated for toric IOL implantation. Toric IOL calculation based on total corneal power of central 4.5mm as measured by Scheimpflug tomography(ST) and the Hoffer-Q(Hq) for under 25mm axial length and Holliday I (H1)for over 25mm formulas

Results

165 cases with the H1 and and 340 with the Hq formulas.  Toric IOLs were used in 445 cases. Postoperative mean values; UDVA 20/18, spherical refractive error -0.35 (+/- 0.22), refractive astigmatism: -0.45 (+/- 0.3

Conclusions

When targeting a slight with-the-rule postoperative astigmatic outcome in clear cornea cataract surgery and when keratometric values used derive from total corneal central 4.5mm measurements with Scheimpflug tomography, the majority of naïve eyes undergoing clear corneal cataract surgery can benefit from the use of an even low power toric IOL. These data are very different of the peer-reviewed published practices internationally, that are usually based on astigmatic measurements from manifest refraction and/or central up to 3mm anterior keratometry pre-operative data.