Topic summary
Implantable collamer lens
Extracted from the Wikipedia article Phakic intraocular lens.
Disadvantages
Another concern is progressive shallowing of the anterior chamber which normally occurs with advancing age due to the growth of the eye's natural lens. Multiple studies have shown a 12–17 μm/year decrease in the anterior chamber depth with aging. If a phakic IOL patient is assumed to have a 50-year lifespan, the overall decline in ACD may add up to 0.6–0.85 millimetres (0.024–0.033 in); long-term data about this effect are not available. This concern is more important in implantable collamer lens because it is implanted in the narrowest part of the anterior segment.