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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
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.
Sir charles Gairdner Hospital, Nedlands, Western Australia
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.
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).
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.
... research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented
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