ABSTRACT
PURPOSE: To evaluate clinical outcomes with a premium diffractive-refractive trifocal toric intraocular lens (IOL) over a 12-month period. METHODS: Multicentre prospective clinical trial including 227 eyes of 114 patients undergoing cataract surgery with bilateral implantation of the AT LISA tri toric 939MP IOL (Carl Zeiss Meditec, Jena, Germany). One patient was implanted unilaterally. Outcome measures were: visual acuity, manifest refraction, reading performance, contrast sensitivity, defocus curve, patient satisfaction and subjective quality of vision. Alpins vector analysis was used to evaluate astigmatic changes. RESULTS: 12-month follow up results of binocular uncorrected distance, intermediate and near visual acuity were ≤0.3 logMAR in 99.0%, 98.10% and 91.40% of eyes, respectively. 79.7% of eyes had a cylinder value of ±0.50 D at 12 months post-surgery. Contrast sensitivity was in the normal range at 6 months post-surgery. The defocus curve exhibited a smooth transition between far and near foci. Vector analysis showed a mean magnitude of error of -0.16 ± 0.48 D. Mean binocular distance-corrected reading visual acuity was 0.15 ± 0.13 logRAD at 6 months postoperatively. 93.3%, 89.4% and 84.6% of patients expressed satisfaction (good or very good) with distance, intermediate and near vision, respectively, 12 months after surgery. Most (≥95%) patients felt that visual disturbances, including halos, glare, focusing difficulties and depth perception, caused little or no disturbance. CONCLUSIONS: The diffractive-refractive trifocal toric IOL, AT LISA tri toric 939MP, provides effective distance, intermediate and near visual acuity in eyes with corneal astigmatism. Patient satisfaction was high and 98.1% of patients expressed satisfaction with the IOL implanted.
Subject(s)
Lenses, Intraocular , Pseudophakia/therapy , Refraction, Ocular/physiology , Vision, Binocular/physiology , Visual Acuity/physiology , Female , Follow-Up Studies , Humans , Male , Middle Aged , Patient Satisfaction , Phacoemulsification , Prospective Studies , Prosthesis Design , Pseudophakia/physiopathology , Surveys and Questionnaires , Time Factors , Treatment OutcomeABSTRACT
We report a study of astigmatism and postoperative complications in 170 eyes following phacoemulsification and implantation of a flexible silicone intraocular lens (SI-18NB) in the capsular bag. No significant difference existed between the preoperative mean astigmatism and the postoperative mean astigmatism after 7 days and after 1 month. Complications were infrequent and compared with those associated with PMMA intraocular lenses.
Subject(s)
Cataract Extraction/methods , Lenses, Intraocular , Humans , Silicone Elastomers , Visual AcuityABSTRACT
Congenital ptosis of the upper lid is classified as a developmental anomaly of the levator muscle. We report the histochemical findings in 38 specimens of levator muscle removed in patients with congenital ptosis and operated on by a resection of the levator muscle. Results demonstrated a close relationship between the presence or the absence of muscular fibres in the specimen and the degree of ptosis and the levator function. We suggest that congenital ptosis may result from a failure of differentiation and/or fusion of the anterior portion of the superior orbital mesoderm complex.
