Abstract
BackgroundIntrascleral fixation of an intraocular lens (IOL) is used in eyes that lack capsular support. The aim of the study is to determine whether a larger optical diameter IOL will decrease the higher-order aberrations (HOAs) when the haptics are extended for intrascleral fixation than a smaller diameter IOL.MethodsThree-piece acrylic IOLs with 6.0 mm optics (X-60, VA-60BBR) and 7.0 mm optics (X-70, VA-70 AD) were fixed at lengths of 13, 14, 15, 16, or 17 mm. A wavefront analyzer was used to measure the HOAs within the central 3.0 and 5.2 mm optic diameter.ResultsThe astigmatic aberration within the central 5.2 mm was greater than that within the central 3.0 mm for all IOLs. The HOAs increased significantly with an extension of the IOLs with both optical diameters (P < 0.001). The coma aberration within the central 5.2 mm was greater than that within the central 3.0 mm but it did not increase with an extension of the haptics. The astigmatic aberration of the X-60 IOL was significantly greater than that of the X-70 only at an extension of 17 mm. The astigmatic aberration of the VA-70 AD was not significantly different from that of the VA-60BBR. The cylindrical power changed from 0.047 D in the X-60 to 0.118 D in the VA-70 AD when the IOLs were extended from 13 to 17 mm.ConclusionWhen three-piece IOLs are highly extended for intrascleral fixation, the astigmatic aberration increases significantly. However, IOLs with 7 mm optics do not have less astigmatic and coma aberrations than IOLs with 6 mm optics.
Highlights
Intrascleral fixation of an intraocular lens (IOL) is used in eyes that lack capsular support
The haptics of the IOL are fixed within the inner sclera near the ciliary sulcus, and the haptics can be extended more by transscleral suturing because the diameter of the commercial available IOLs is between 12 and 13 mm
We have reported that the higher-order aberrations (HOAs) near the haptics-optics junction were higher, and the astigmatic aberration increased when the haptics of the IOL were extended in a simulated intrascleral fixation model [20]
Summary
Intrascleral fixation of an intraocular lens (IOL) is used in eyes that lack capsular support. An anterior chamber intraocular lens (IOL), or an iris-fixed IOL, or a transsclerally fixed IOL is used in eyes that lack or have insufficient capsular support. In transsclerally fixed IOLs, the transscleral suturing is usually performed to the ciliary sulcus or to the pars plana [1,2,3,4]. A scleral flap technique with sutures or fibrin glue on the scleral flap to fix the haptics loop of the IOLs has been reported [6, 7]. The haptics of the IOL are fixed within the inner sclera near the ciliary sulcus, and the haptics can be extended more by transscleral suturing because the diameter of the commercial available IOLs is between 12 and 13 mm
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
