Clinical Outcomes After Implantation Of A Transitional Conic Toric Intraocular Lens In Patients With Asymmetric And Irregular Corneas

To evaluate the visual and refractive outcomes, as well as the safety of a toric intraocular lens (IOL) with
a Transition Conic Toric design in a series of cataract patients with stable asymmetric or irregular corneal
astigmatism.

Longitudinal, prospective, interventional, un-masked, cross-sectional and non-comparative
clinical study in a single center.

In this longitudinal, prospective, interventional, un-masked,cross-sectional and non-comparative clinical
study, 20 eyes of adult cataract patients are being included.Eyes included present clinical and
topographic findings of stable non progressive asymmetric or irregular corneal astigmatism caused by
conditions as traumatic or postsurgical leucomas and scars, decentered previous Lasik surgery,mild
stable keratoconus, or post keratoplastic surgery.The main outcome parameters are postoperative
corrected/uncorrected distance visual acuity monocular and binocularly. Manifest refraction, contrast
sensitivity and corneal endothelial cell count are being measured as a secondary outcome parameter.
The follow-up visits are at 1 and 4 months after surgery.

Preliminary results at 1 month after surgery will be presented, including manifest spherical and
cylindrical refraction, mean monocular uncorrected distance visual acuity (UDVA) and mean monocular
corrected distance visual acuity (CDVA) pre and postoperatively in LogMAR scale. Contrast sensitivity
outcomes in photopic and mesopic conditions at spatial frequencies of 1.5, 3, 6, 12 & 18 cycles per
degree will also be presented. Safety outcomes will include the percentage of endothelial cell loss at one
month.

The Precizon Toric IOL (Ophtec BV, The Netherlands) has a transitional conic design that
suggests being a safe option for cataract patients with stable asymmetric or irregular corneal
astigmatism providing them with good visual and refractive outcomes.