Visual Outcomes Of Implantation Of A Novel Spiral Full Range Of Focus Optics Intraocular Lens At 1 And 3 Months After Cataract Surgery.

The study aims to assess the clinical performance of the novel intraocular lens (IOL) regarding the range of functional vision and to determine the eventual presence and severity of undesirable optical phenomena.

Department of Ophthalmology, Faculty of Health Sciences of the J.E.Purkyne University and the Masaryk Hospital, Usti nad Labem, Czech Republic

Department of Ophthalmology for Children and Adults, Second Medical Faculty of the Charles University and Motol University Hospital, Prague, Czech Republic

In 44 eyes of 25 patients with no other ocular pathology, uncomplicated cataract surgery with implantation of a novel IOL with a spiral full range of focus optics was performed. The target refraction was emmetropia and the IOL power with first plus value was selected to not exceed 0.35 diopters (D) post-op. Corneal astigmatism was corrected with toric implants, the IOL cylinder power was selected to achieve a post-op cylinder value of less than 0.5 D. The decimal visual acuities (VAs) at distance, intermediate distance (66 cm) and near (33 cm), and monocular randomized defocus curves were measured at 1 month (1M) and 3 months (3M) post-op. Questions about the presence and severity of optical phenomena were actively asked during follow-ups.

The mean achieved subjective spherical equivalent was -0.04 (SD 0.21) in 1M and 0.00 in 3M. The mean achieved subjective cylinder was -0.05 (SD 0.15) in 1M and 0.00 in 3M. In the 1M, the mean uncorrected VA was 1.11 (SD 0.19) at distance, 0.92 (SD 0.18) at intermediate, and 0.63 (SD 0.12) at near, the mean distance corrected VAs were similar with 1.12, 0.93 and 0.61 respectively. In the 3M, the mean uncorrected VAs and the distance corrected VAs were identical: 1.14 (SD 0.17) at distance, 0.93 (SD 0.18) at intermediate, and 0.61 (SD 0.12) at near. The monocular defocus curves showed a smooth plateau between +0.25 and -2.5 D with a mean VA better or equal to 0.9 decimal. The presence of minor optical phenomena was mentioned by 1 patient.

According to our experience, the novel spiral full range of focus optics IOL shows very promising results in terms of a smooth plateau in the defocus curve analysis indicating a whole functional range of vision with minimal presence of optical phenomena. We also consider the offer of implants with a cylindrical power of 0.75 D on IOL plane to be very useful, as this implant was used in 50% of eyes in our group.