Rotational stability and posterior capsule opacification of a plate-haptic and an open-loop-haptic intraocular lens

Abstract

The 2 IOL models had comparable, excellent rotational stability and low PCO intensity 1 year postoperatively. Thus, the plate-haptic IOL may be a good platform for a toric model.

Evaluation of Rotation and Visual Outcomes After Implantation of Monofocal and Multifocal Toric Intraocular Lenses

“…These results were in agreement with others demonstrating that rotation occurred 1 hour after surgery. 12 The fact that the rotation takes place so quickly suggests that it might be a consequence of poor friction between the haptic and the capsular bag due to an incomplete ophthalmic viscoelastic device clearance, as previously suggested. Alternatively, it could be due to the size difference between the capsular bag and IOL diameter.…”

“…Neverthe- less, it is important to indicate that these results were in disagreement with those described by Patel et al 23 because they described plate-haptic lenses as more stable in terms of rotation than open-loop haptic lenses. Interestingly, Prinz et al 12 found a similar rotational behavior between both lens designs. Surprisingly, the multifocal design of the AcrySof IQ toric IOL showed 2° more rotation than the monofocal design.…”

“…1,2,[11][12][13] Both misalignment (differences between preoperatively calculated IOL position and real IOL position just after surgery) and rotation (differences between real IOL position just after surgery and IOL position at postoperative follow-up visits) are critical to a successful surgery in terms of visual quality. If the IOL rotates 15° off axis after surgery, there will only be half correction of the power and the resultant cylinder will be shifted to a new axis.…”

“…There are several studies on toric IOL rotation, 1,2,[11][12][13] but to the best of our knowledge this is the first study to compare rotational stability between monofocal and multifocal toric IOLs and between different designs. Moreover, in this study, monofocal toric IOLs were compared with the surgery protocol performed by the same surgeon.…”

“…Toric IOL rotation after implantation was due to various mechanisms. Factors that may induce toric IOL rotation include postoperative intraocular pressure fluctuations, 18 reduced friction between the haptics and the capsular bags produced by an incomplete ophthalmic viscoelastic device removal, 19 or capsule size, 20 IOL design and materials, 12 and compression of the IOL from capsule shrinkage. 21 The current results indicated that rotation occurs in all of the lenses during the first hour after surgery and remains stable during the first month.…”