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Monovision with extended depth of focus intraocular lens

Session Details

Session Title: New evaluation tools in refractive surgery

Session Date/Time: Sunday 06/10/2013 | 08:00-09:30

Paper Time: 08:33

Venue: Forum (Ground Floor)

First Author: : Y.Ton ISRAEL

Co Author(s): :    D. Spokes   G. Barrett           

Abstract Details

Purpose:

To compare visual performance in monovision and emmetropic patients implanted with positive spherical aberrations (SA) intra-ocular lens (IOL). The lens was designed to enhance depth of focus in eyes aimed for near, as positive SA and myopia work constructively to improve image quality.

Setting:

Sir charles Gairdner Hospital, Nedlands, Western Australia

Methods:

Cataract patients were implanted with a positive SA IOL in one or both eyes and were aimed for emmetropia or modest monovision (-1.25D). Binocular unaided visual acuity for distance, intermediate and near, stereo-acuity and a modified VQ-25 questionnaire were evaluated 3 months following surgery.

Results:

LogMAR unaided binocular visual acuities for distance, intermediate and near were -0.02, 0.06 and 0.3 in the emmetropic group (N=24) and -0.04, -0.04 and 0.2 in the monovision group (N=21), (p= 0.12, 0.001 and 0.02, respectively). Patients in the emmetropic group have stated that they need their glasses for near tasks at an average of 56% of the time compared with 33.5% in the monovision group (p=0.04). Unaided stereo-acuity was found to be 68.7±57 seconds of arc with emmetropia and 72.6±64.8 with monovision (p=0.91).

Conclusions:

Monovision patients performed better than emmetropic patients, although satisfaction was high in both groups. Stereo-acuity is not compromised with a modest amount of monocular myopic defocus.

Financial Interest:

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