Abstract

SO.06.06

Clinical results of the aspheric intraocular lens FY-60AD (Hoya) with particular regard to decentration and tilt

Hakan Kaymak, Steffen Heinen, Ulrich Mester
Augenklinik, Bundesknappschaft Sulzbach/Saar, Sulzbach

Objective
Aspheric intraocular lenses aim to improve visual function and particularly contrast vision by neutralizing spherical aberration. One drawback of such IOLs is the enhanced sensitivity against decentration and tilt, which can deteriorate image quality.
Methods
Thirty patients who received bilateral phacoemulsification with in the bag implantation of the aspheric lens FY-60AD (Hoya) were included in a prospective study. In 25 patients (50 eyes) the following=0 D parameters could be assessed 3 months after surgery: Visual acuity, refraction, contrast sensitivity, pupil size, wavefront errors, and decentration and tilt using a newly developed device.
Results
The functional results were very satisfying and comparable to results gained with other aspheric IOLs. Wavefront measurements revealed a good compensation of the corneal spherical aberration. But vertical and horizontal coma also showed opposite values of cornea and IOL. The assessment of the lens position using the purkinjemeter demonstrated uncritical amounts of decentration and tilt.
Conclusions
In a normal dioptric power range, the aspheric IOL FY-60AD compensates the corneal spherical aberration very well with only minimal decentration. The slight tilt is symmetrical in both eyes and mimics the position of the crystalline lens in young eyes. That may contribute to our findings of compensated corneal coma.

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