Toric intraocular lenses in the real world: rotational performance and visual outcome – does the astigmatism axis matter?

Session Details

Session Title: Presented Poster Session: Toric IOLs

Venue: Poster Village: Pod 1

First Author: : M.Quiroz Quiroga SPAIN

Co Author(s): :    A. Matheu Fabra   M. Saint-Gerons Trecu   P. Burgos Fernandez   J. Armentia Perez de Mendiola   C. Pueyo Asensio   A. Herranz Cabarcos        

Abstract Details

Purpose:

To evaluate the rotational stability, its influencing factors and the visual outcome of an aspheric one-piece hydrophobic acrylic toric intraocular lens (IOL) in a public hospital with high astigmatism pacients.

Setting:

Department of Ophthalmology Hospital de l'Esperança - Parc de Salut Mar, Barcelona, Spain.

Methods:

Retrospective study performed in a tertiary care center in Spain. Thirty eyes with visually significant cataract and regular corneal astigmatism greater than 2 diopters (D) were included. They underwent standard phacoemulsification and were implanted with a toric IOL. Patients were called for follow up on day 1, 1 week, 1 month, and 3 months, postoperatively. The axis of the toric IOL, was measured by slit lamp. The analysis was performed in three separated groups by the astigmatism axis (Group A: 180º+/-20º), (Group B: 90º+/-20º) and (Group C: between 20º and 70º; and between 110º and 160º).

Results:

The mean preoperative refractive astigmatism was 3,39 (2,39) D and the mean postoperative at three months was 0,65 (0,49) D (p<0,05). The preoperative visual acuity was 0,46 (0,25) logMAR and postoperative 0,24 (0,18) logMAR (p<0,001). At day 1 misalignment was 3,39º (5,14º) (p=0.003); between day 1 and 1 week 1,03º (4,57º), between 1 week and 1 month  0,5º (1,9º) and between 1 and 3 months 0,3º(1,1º) The mean rotational misalignment at three months was for Group A 3,29 (5,53) , Group B 7,92 (7,9) and Group C 2,78 (4,24) (p=0,14).

Conclusions:

The visual acuity and the refractive astigmatism were significantly corrected in all groups. The 57% of toric IOL tended to rotate postoperatively and 13% more than 10 degrees which required surgical rotation.The rotation was significantly increased within the first day operation  compared with later time points (p=0,003). Although it seems affected by the astigmatism axis, there was not statistically significant difference.  Further prospective studies are needed in order to elucidate this results. No author has financial interest in any material or method mentioned.

Financial Disclosure:

None