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Piggyback foldable intraocular lens implantation in patients with microphthalmos
1Department of Ophthalmology, University of Tokyo School of Medicine, Tokyo, Japan. oshika-tky@umin.ac.jp
Purpose:
To evaluate the clinical results of phacoemulsification and implantation of 2 foldable acrylic intraocular lenses (IOLs) in microphthalmic eyes.
Setting:
University of Tokyo School of Medicine, Tokyo, Eguchi Eye Hospital, Hakodate, and Osaka Rosai Hospital, Osaka, Japan.
Methods:
This study comprised 5 eyes of 3 patients whose manifest spherical equivalent was +10.5 to +18.0 diopters (D) and axial length was 15.79 to 16.82 mm. After phacoemulsification, 2 foldable acrylic IOLs with a mean power of +43.0 D +/- 9.5 (SD) (range +32.0 to +55.0 D) were implanted in the capsular bag.
Results:
There were no significant intraoperative complications, and there was significant improvement in uncorrected and best corrected visual acuities after surgery. The spherical equivalent decreased significantly; however, the postoperative refraction was considerably more hyperopic than predicted in all eyes. Except for posterior synechias in 2 eyes and slight interlenticular opacification in 2 eyes, no major postoperative complications occurred during the mean follow-up of 14.8 months.
Conclusions:
Implanting 2 piggyback IOLs was beneficial in eyes with an extremely short axial length. However, the current system of lens power calculation markedly underestimates the required lens power, resulting in a hyperopic refractive error after surgery. The benefits of in-the-bag placement of 2 foldable lenses are questionable.
