Psychophysical Evaluation Of Positive Dysphotopsia In Multifocal Intraocular Lenses
Published 2023 - 41st Congress of the ESCRS
Reference: FP12.10 | Type: Free paper | DOI: 10.82333/s62g-v593
Authors: Jorge Henriques* 1 , Tatiana Queirós 2 , Vera Afreixo 3 , Conceição Lobo 4 , Joaquim Murta 5
1Ophthalmology,CHUC,Coimbra,Portugal;Clinical Academic Center of Coimbra (CAAC),Coimbra,Portugal;Faculty of Medicine, University of Coimbra (FMUC),Coimbra,Portugal, 2Ophthalmology,CHUC,Coimbra,Portugal, 3University of Aveiro,Aveiro,Portugal, 4Ophthalmology,CHUC,Coimbra,Portugal;Clinical Academic Center of Coimbra (CAAC),Coimbra,Portugal;Faculty of Medicine, University of Coimbra (FMUC),Coimbra,Portugal;Associação para a Investigação Biomédica e Inovação em Luz e Imagem,Coimbra,Portugal, 5Ophthalmology,CHUC,Coimbra,Portugal;Ophthalmology,Clinical Academic Center of Coimbra (CAAC),Coimbra,Portugal;Ophthalmology,Faculty of Medicine, University of Coimbra (FMUC),Coimbra,Portugal
Purpose
To evaluate the usefulness of Light Disturbance Analyzer (LDA) in quantifying the size and shape of the light distortion caused by a high-intensity light source at the retina plane in patients with bilateral multifocal or enhanced depth of focus (EDOF) intraocular lenses (IOLs) at the late postoperative period.
This study aims also to provide a more objective and quantitative assessment of positive dysphotopsia.
Setting
This study was held at Ophthalmology Department of Centro Hospitalar e Universitário de Coimbra, Portugal.
Methods
A cross-sectional observational study was designed in patients undergoing cataract surgery with implantation of diffractive multifocal [TFNT00/TFNT(20-60), Alcon Fort Worth, Tx, USA] or EDOF [DFT015/DFTx15, Alcon Fort Worth, Tx, USA] IOLs.
All the patients underwent LDA assessment of the area around a source of glare within which other light cannot be seen by the patient (area of disturbance). Light disturbance index (LDI) and Best-fit circle irregularity standard deviation (BFCIrregSD) were collected.
All the patients performed aberrometry with iTrace (Tracey Technologies) in the late postoperative period of cataract surgery.
Patients were also invited to answer Quality of Vision (QoV) and CatQuest 9SF questionnaires.
Results
A total of 104 eyes from 52 patients (n=52) were included.
The mean age was 60.2 (+/- 9,3) years; 22 patients received the trifocal IOL and 30 the EDOF IOL.
The average LDI was 22.5% (SD +/- 7.2) for trifocal and 19.5% (SD +/- 6.9) for EDOF IOLs.
The most prevalent symptoms in the QoV questionnaire were glare, halos, and starbursts for trifocal and glare and halos for EDOF IOLs.
A statistical difference was found between trifocal and EDOF in the QoV questionnaire, with lower scores for EDOF IOLs.
There was no statistically significant correlation between aberrometry parameters and LDI.
QoV scores showed a statistically significant correlation with disturbance area and LDI values obtained from the LDA.
Conclusions
The LDA appears to be a useful tool to psychophysically assess objectively positive dysphotopsia and visual performance under a glare source in patients with multifocal and EDOF IOLs.