The monofocal toric intraocular lens (IOL) (enVista Toric Model MX60T, Bausch + Lomb) provides better refractive and visual outcomes to cataract patients with mild-to-moderate astigmatism compared with the IOL’s counterpart without a toric component.
This one-piece hydrophobic acrylic toric model, which was approved on June 8, 2018, is available with seven cylinder powers with lowest being 1.25 D (under 1 D at the corneal plane). Most patients who have undergone a cataract surgery had some preoperative corneal astigmatism that required management to ensure achievement of the optimal postoperative outcomes.
If not addressed, uncorrected astigmatism that is as minor as 0.75 D can cause symptoms such as visual blur, ghosting, and halos, according to clinical investigator Chad L. Betts, MD.
In light of this, Dr. Betts and colleagues compared the clinical outcomes obtained with the monofocal toric IOL to those achieved with the non-toric IOL in patients with mild-to-moderate corneal astigmatism.
Single-site data from a prospective, multicenter, partially randomized, double-masked study included 33 patients (20 men, 13 women; mean age, 72.6 years) with preoperative cylindrical values ranging from 0.9 to 1.5 D.
The patients were randomly selected for implantation of either a 1.25-D toric IOL or a non-toric control IOL and followed for six months postoperatively. The mean uncorrected distance visual acuity (UCDVA) best-corrected distance visual acuity (BCDVA), reductions in the refractive cylinder, manifest refraction spherical equivalent (MRSE), and safety were measured at the final examinations.
CHAD L. BETTS, MD
E: [email protected]
This article is based on Dr. Betts’ presentation at the American Society of Cataract and Refractive Surgery annual meeting. Dr. Betts is a clinical investigator for Bausch + Lomb.