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Aspheric treatment for the light adjustable lens
Session Title: New IOLs
Session Date/Time: Tuesday 08/10/2013 | 16:30-18:15
Paper Time: 17:40
Venue: Elicium 1 (First Floor)
First Author: : F.Hengerer GERMANY
Co Author(s): : H. Dick I. Conrad-Hengerer
To present the visual results achieved using an aspheric treatment for the light adjustable lens.
Ruhr University Eye Hospital, Bochum, Germany
The light adjustable lens (LAL) was implanted in the non-dominant eye or the emmetropic dominant eye with an uncorrected distance visual acuity (UDVA) of 20/20 or better. The primary adjustment targeted a spherical refraction of 0.25-0.50 D and a cylindrical refraction of <0.75 D. The secondary adjustment aimed at inducing an asphericity of -0.20 (Z12, 4.0 mm pupil). Adjustment treatments were followed by 2 lock-in treatments. Visual outcomes included uncorrected distance, intermediate, and near visual acuity (UDVA, UIVA, and UNVA, respectively).
At 6 months post-adjustment, the mean UNVA improved from J5 pre-adjustment to J3 post-adjustment, mean UIVA improved from J4 pre-adjustment to J1 post-adjustment, and mean UDVA improved from J3 pre-adjustment to J2 post-adjustment. There was a shift in measured asphericity at 1 month following the aspheric adjustment. One patient with binocular aspheric treatment achieved UNVA, UIVA, and UDVA of J2, J1, and 20/32 OD, respectively and J2, J2-, and 20/25 OS, respectively. Two patients reported worsened UDVA after application of asphericity that was corrected by additional myopic adjustment.
Postoperative adjustment can improve UDVA. An aspheric treatment following the first adjustment can improve UNVA and UIVA but does not affect UDVA. Therefore, the dominant eye can be adjusted to emmetropia while an ashperic treatment applied to the non-dominant eye can improve near and intermediate visual acuity. Further investigations will be necessary to individualize the amount of induced asphericity based on the patients needs.