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. 2023 Aug;43(8):2737-2747.
doi: 10.1007/s10792-023-02673-7. Epub 2023 Mar 10.

Rotational stability and refractive outcomes of the DFT/DATx15 toric, extended depth of focus intraocular lens

Kevin M Barber  1 , Sara O'Connor  2 , Philip Mackinder  2 , Andreea Chih  2 , Brian Jones  2
Affiliations

Rotational stability and refractive outcomes of the DFT/DATx15 toric, extended depth of focus intraocular lens

Kevin M Barber et al. Int Ophthalmol. 2023 Aug.

Erratum in

Abstract

Purpose: To quantitatively assess postoperative rotational stability and visual acuity with the DFT/DATx15 extended depth of focus (EDOF) toric intraocular lens (IOL).

Methods: In this prospective case series, thirty-five patients with a calculated IOL power between + 15.0 D and + 25.0 D, corneal astigmatism between 0.75 D and 2.25 D, and no significant ocular pathology underwent cataract surgery. Primary outcome was rotational stability of the IOL at 1 month post-operatively. Secondary outcomes included residual refractive astigmatism, absolute residual astigmatism prediction error, and monocular distance and intermediate visual acuities.

Results: Mean absolute postoperative IOL rotation was 1.1 ± 0.2 degrees, with no rotation of more than 3 degrees at the final visit. Monocular mean best spectacle-corrected distance visual acuity (BSCDVA) improved from logMAR 0.27 ± 0.030 to 0.078 ± 0.017 (P < .001). Monocular uncorrected distance visual acuity (UCDVA) improved from 0.93 ± 0.096 to 0.18 ± 0.022 (P < .001). Best spectacle-corrected intermediate visual acuity (DSCIVA) was 0.17 ± 0.025, and uncorrected intermediate visual acuity (UCIVA) was 0.27 ± 0.040. Residual regular astigmatic refractive error was 0.21 ± 0.047 D.

Conclusions: The toric DFT/DATx15 EDOF lens showed excellent rotational stability and effective and predictable correction of astigmatism. Its refractive outcomes and safety profile were similar to those identified in prior studies of the non-toric DFT/DAT015 EDOF IOL. A small difference in monocular BSCDVA, of uncertain clinical significance, was found when comparing these outcomes with prior DFT/DAT015 data. The trial was retrospectively registered on November 5, 2021 (TRN ​​NCT05119127).

Keywords: Corneal astigmatism correction; Extended depth of vision; Intermediate visual acuity; Vivity.

Plain language summary

In cataract surgery, the natural lens of the eye is replaced with an artificial lens implant. In many cases, the patient’s glasses prescription in the operated eye can be reduced or eliminated through careful choice of a lens implant. There are many types of lens implants available. Toric lens implants are used to reduce one component of the glasses prescription, called regular astigmatism (or often just “astigmatism”). To maintain the full astigmatism-reducing effect of the toric lens, the lens implant must not rotate significantly within the eye after the surgery. The DFT/DATx15 (Vivity™) is a relatively new type of lens implant designed to offer patients good spectacle-free vision at far distances and improved glasses-free vision at arm’s length (“intermediate”) compared to a more traditional lens implant that is designed to maximize spectacle-free distance vision only. This study reports one surgeon’s experience with measuring the amount of rotation of DFT/DATx15 lenses after surgery. This study also assessed the ability of the DFT/DATx15 to reduce regular astigmatism and improve glasses-free vision at far and intermediate distances. The results show that this lens did not rotate significantly within the eye and was effective at reducing the regular astigmatism as intended.

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Conflict of interest statement

This study was supported by an investigator-initiated trial by Alcon.

Figures

Fig. 1
Fig. 1
Preoperative and postoperative refractive regular astigmatism. The cylindrical component of preoperative and postoperative (month 1) manifest refractions were plotted [30] on a single-angle plot in positive cylinder notation
See this image and copyright information in PMC

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