Abstract
BackgroundTo compare visual performance between the iris-fixated phakic intraocular len (pIOL) and implantable collamer len (ICL) to correct high myopia.MethodsTwenty-four eyes underwent iris-fixated pIOL implantation and 24 eyes underwent ICL implantation. At the 6-month follow-up, the best-corrected visual acuity (BCVA) and uncorrected distance visual acuity (UDVA) were compared between the iris-fixated pIOL and ICL groups. The objective scatter index (OSI), modulation transfer function (MTF) cutoff, and ocular aberrations were performed to evaluate postoperative visual quality between the two groups.ResultsNo significant difference was found in UDVA, BCVA, and spherical equivalent between the iris-fixated pIOL and ICL groups (P > 0.05). Six months after surgery, the following values were significantly higher in the ICL group than in the iris-fixated pIOL group: MTF cutoff, strehl ratio and optical quality analysis system values at contrasts of 9 %, 20 %, and 100 % (P < 0.01). The OSI in the iris-fixated pIOL group was higher than in the ICL group 6 months after surgery (P < 0.01). All high-order aberrations were slightly more severe in the iris-fixated pIOL group than in the ICL group 6 months after surgery, although only trefoil (P = 0.023) differed significantly in this regard.ConclusionsBoth iris-fixated lenses and ICLs can provide good visual acuity. ICLs confer better visual performance in MTF-associated parameters and induce less intraocular light scattering than iris-fixated pIOLs.
Highlights
To compare visual performance between the iris-fixated phakic intraocular len and implantable collamer len (ICL) to correct high myopia
Previous studies have reported that implantation of irisfixated phakic intraocular len (pIOL) and implantable collamer lenses (ICLs) is safe, efficient, predictable, and stable [9, 10]
In ICLs, the diameter of the optical zone changes from 4.5 to 5.8 mm. This limited size may lead to glare and halo, so subjective and objective vision quality must be further compared between iris-fixated pIOLs and ICLs with a central hole in the correction of high myopia
Summary
To compare visual performance between the iris-fixated phakic intraocular len (pIOL) and implantable collamer len (ICL) to correct high myopia. While the latest generation of posterior chamber ICL has an additional 360 μm central hole that can eliminate the need for peripheral iridectomy. They increase aqueous humor circulation, nourishing the lens [11]. In ICLs, the diameter of the optical zone changes from 4.5 to 5.8 mm This limited size may lead to glare and halo, so subjective and objective vision quality must be further compared between iris-fixated pIOLs and ICLs with a central hole in the correction of high myopia
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