Comparison Of Visual Outcomes Between Three Different Trifocal Intraocular Lenses

To compare the visual performance and defocus curve of three trifocal intraocular lenses: Liberty (Medicontur), FineVision (PhysIOL) and AT Lisa Tri (Zeiss).

Subjects with cataract with increasing visual demands and more demanding. The number of intraocular lenses available that attempt to correct not only cataract and distance vision, but also presbyopia, have increased. Today patients not only require a full range of high-quality vision at all distances, also we, as professionals, should demand more from the intraocular lens designs to obtain more reliable results and a fewer number of post-surgical surprises.

150 eyes of 75 patients were included in this prospective and observational study of which 25 patients were implanted bilaterally with the Liberty intraocular lens, 25 patients with FineVision and 25 patients with AT Lisa.

Defocus curve (+3.00 to -5.00D) were obtained monoculary under photopic conditions at three months after surgery. The optotype used was ETDRS. Furthermore, postoperative refraction and visual acuity at distance, intermediate and near distances were measured both a month and three months. Paired t-test were used to assess differences in visual acuity.

Three months after surgery, the Liberty group showed a mean corrected distance visual acuity (CDVA) of -0.03±0.08, corrected intermediate visual acuity (CIVA) of 0.25±0.17 and corrected near visual acuity (CNVA) of 0.09±0.19; the FineVision group showed a mean CDVA of 0.04±0.04, CIVA of and 0.12±0.05, CNVA of 0.09±0.05 and the AT Lisa group showed a mean CDVA of 0.05±0.05, CIVA of and 0.19±0.03 and CNVA of 0.13±0.15.

The visual acuity at defocus curve for Liberty group showed -0.03±0.08 in far vision, 0.14±0.14 in intermediate and 0.04±0.11D in near vision. For FineVision group a visual acuity of 0.01±0.03D, 0.31±0.08D and 0.20±0.02D was obtained respectively and for AT Lisa group 0.04±0.05D, 0.14±0.04D and 0.15±0.04D respectively.

Regarding refraction, the three groups of lenses showed good refractive results. The best visual acuity in distance and near vision was obtained by the Liberty group while for intermediate vision the best result was obtained by the Liberty and AT Lisa group. The defocus curve, for the entire range from near vision to far vision, showed that the best visual performance is from the Liberty lens. Although all three lenses show good visual performance results, the Liberty lens is slightly superior to the Finevision and AT Lisa lenses.