Clinical Outcomes of New Toric Trifocal Diffractive Intraocular Lens in Patients with Cataract and Stable Keratoconus: 30 Months Follow-up

Purpose: To evaluate the clinical results of toric trifocal diffractive Intraocular lens in eyes with cataract and mild keratoconus. Methods: Five keratoconus patients (10 eyes) that had bilateral AT LISA 939 implantation of were selected and had followed in three-time horizons of 1 and 3months, and 2 years. Patients were 46 to 65 years old age, corneal astigmatism of (2.00 D at 6.75) and cataract that all of them needed cataract surgery. The distance, intermediate and near visual acuities, defocus curve, ocular aberrations, contrast sensitivity, were measured as effectiveness criteria. Results: Average of binocular uncorrected distance visual acuity (UDVA) improved from 0.72 logMAR ±0.11 (SD) to 0.04 ±0.04 (p˂0.05) log MAR, average of uncorrected binocular intermediate visual acuity (UIVA) (80 cm) improved from 0.52 ± 0.07 log MAR to 0.14 ±0.04 (p˂0.05) log MAR and average of binocular uncorrected near visual acuity (UNVA) improved from 0.48 ±0.09 log MAR to 0.02 ±0.07 (p ˂0.05) LogMAR at 30 months, respectively. Contrast sensitivity testing showed acceptable results ,the binocular defocus curve corroborate were in appropriate good visual acuity even at the intermediate distances, by a gentle slope less than Log MAR 0.2 at - 1.5 D, with regard to the best distance visual acuity at the 0 D defocus Conclusion: Trifocal AT LISA 939MP IOLs provided appropriate distances, near and intermediate of the visual results. Prediction of the refractive results and optical performances were good