Meta-Analytic Review of Add-On or Piggyback IOL
Narrative Responses:
Purpose
The "add-on" IOL, designed for and placed within the ciliary silcus over the primary IOL, may be useful for the correction of several post-cataract surgery refractive issues.
Methods
87 cases from numerous peer reviewed and non-peer reviwed sources concerning piggyback implantation were reviewed, including 4 cases which display the consequences of using an incorrect lens.
Results
A review of the literature reveals that conventional piggyback IOL can cause complications including pigmentary dispersion syndrome, elevated intraocular pressure, interlenticular opacification, and IOL decentration or tilt. The add-on IOL improves on conventional piggyback IOLs through materials, design, and optics. These acrylate or silicone IOLs, which has do not apply severe force to the tissue. The haptic design keeps the lens oriented, improving ecentration. Pigment dispersion, ILO, and iris chaffing are less frequent. The larger dimensions than IOLs designed for in the bag use decreases lens rotation and increases rotational stability.
Conclusion
The results from our meta-analysis and our findings from a current FDA compassionate use device exemption conducted at our study site suggest that the add on IOL is a safe and cost effective alternative to current procedures used to correct post-cataract surgery refractive problems.