Comparison of visual symptoms in mesopic conditions of two different models of a non rational symmetric EDOF IOL: Lentis Comfort and Femtis Comfort

Session Details

Session Title: Refractive
Session Date/Time: Friday 21/02/2020 | 08:15-10:10
Paper Time: 08:27
Venue: Fes 1.

First Author: D.Holland GERMANY
Co Author(s): T. Herbst  I. Matthaie  F. Rüfer           

Abstract Details

Purpose:

Comparison of results regarding patient satisfaction, visual symptoms and visual outcome in two prospective clinical trials. The similar optic of both models is designed to achieve the best uncorrected distance and intermediate visual acuity, minimizing visual disturbances like glare, halos or starbusts and to enable good night driving ability. The difference of the two models is the haptic, which is in the Lentis Comfort a standard plate haptic and in the Femtis Comfort designed to achieve an enclavation in the capsulotomy with four additional haptics.  The influence of this difference on the clinical outcome shell be investigated.

Setting:

nordBLICK Augenklinik Bellevue, Kiel, Germany

Methods:

66 cataractous eyes of 33 consecutive patients (12m, 21f) with a mean age of 69±8 years were included into the Lentis Comfort study. In the still ongoing prospective study with the Femtis Comfort 28 eyes of 14 cataract patients were included so far. All different types of dysphotopsia where explained by pictures to the patients. The occurrence of visual symptoms and patient satisfaction was evaluated with a semi-quantitative questionnaire. In one study standard cataract was performed. In the second study a femto Laser assisted cataract surgery was performed. and the Femtis Comfort was enclaved in the pupil centered capsulotomy.

Results:

Under mesopic conditions, the subjective  score (0=no symptoms, 100=severe symptoms) in the Comfort group was 23.4 for glare, 20.8 for halos, and 18.6 for starbursts. For blurred distance resp. intermediate vision, it was 11.6 resp. 21.6, for doubling effects 8.8. Under mesopic conditions, the subjective score was in the Femtis Comfort group 16,0 for glare, 9,00 for halos, and 11,09 for starbursts. For blurred distance resp. intermediate vision, it was 6,09 resp. 17,00, for doubling effects 2,27. Both groups showed comparable results regarding corrected and uncorrected visual acuity. No compllications occoured in both groups.

Conclusions:

Both groups showed good results regarding subjective grading of dysphotopic symptoms. In comparison the Femtis Comfort group shows better results in all types of dysphotopsia. The cause of this difference may be the better centration, the missing overlap of the capsulotomy over the optic and the more anterior position of Femtis Comfort. The additional haptics which are enclaved in the capsulotomy does not seem to have a negative impact on the visual quality especially under mesopic conditions. A larger number of patients will be compared at the end of the ongoing study for further examination.

Financial Disclosure:

... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented