Ultrasound Biomicroscopy Comparison of<i>Ab Interno</i>and<i>Ab Externo</i>Intraocular Lens Scleral Fixation

Horiguchi, Lie; Garcia, Patricia Novita; Malavazzi, Gustavo Ricci; Allemann, Norma; Gomes, Rachel

doi:10.1155/2016/9375091

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…Similar studies in the literature have compared other techniques of IOL fixation. In 2016, Horiguchi et al [16] compared the ab interno and ab externo IOL scleral fixation techniques, which are both variants of the sutured transscleral fixation, and concluded that both techniques achieved similar results in haptic placement, but the ab externo technique was associated with greater vertical tilt. In 2018, Chantarasorn et al [17] compared reinforced scleral fixation using double sutures and intrascleral IOL fixation.…”

Section: Discussionmentioning

confidence: 99%

Observational study of intraocular lens tilt in sutureless intrascleral fixation versus standard transscleral suture fixation determined by ultrasound biomicroscopy

Marianelli

Mendes²,

Manzano³

et al. 2019

Int J Retin Vitr

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Background The position of the intraocular lens (IOL) is a major factor that affects the final visual acuity after cataract surgery. However, no prospective study has compared the IOL positions associated with the sutureless intrascleral technique and the standard transscleral suturing technique. The current study compared the IOL positions in the two techniques using ultrasound biomicroscopy (UBM) in vivo. Methods Twenty-one eyes of 21 patients were included in this observational study conducted between February and May 2015. Eleven patients underwent the sutureless intrascleral technique, and 10 patients underwent transscleral fixation with suturing. Ophthalmologic examination and UBM were performed in all patients. Optic tilt was measured in relation to the iris plane. The haptic location was defined. Mann–Whitney test and multiple linear regression were used to analyze the vertical and horizontal gradients. Significant differences were considered when p ≤ 0.05. Results The most common indication for scleral fixation was a complication during phacoemulsification (81.81% in the sutureless group and 60% in the suture group). The mean vertical and horizontal tilts were, respectively, 0.24 ± 0.21 and 0.25 ± 0.19 mm in the sutureless group and 0.14 ± 0.17 and 0.23 ± 0.16 mm in the suture group. No significant differences were seen in the vertical tilt and horizontal tilt (p = 0.888 and p = 0.148, respectively) between the groups. Gender (p = 0.835), age (p = 0.888), follow-up time (p = 0.915), and surgical duration (p = 0.094) were not associated with optic tilt. Of the 22 haptics in the sutureless group, 21 (95.45%) were in the intrascleral tunnel; of the 20 haptics in the suture group, 13 (65%) were posterior to the ciliary body, four (20%) anterior to the ciliary body, and three (15%) in the ciliary sulcus. Conclusion This study showed that there are no significant differences in the IOL positions between the two techniques.

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Section: Discussionmentioning

confidence: 99%

Observational study of intraocular lens tilt in sutureless intrascleral fixation versus standard transscleral suture fixation determined by ultrasound biomicroscopy

Marianelli

Mendes²,

Manzano³

et al. 2019

Int J Retin Vitr

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“…They reported that a severe tilting of the IOL caused a significant amount of ocular coma-like aberrations, and that there was a significant positive correlation between the IOL tilt and the coma-like aberration. Horiguchi and associates [ 14 ] also reported a tilting of the IOLs after ab interno and ab externo transscleral fixation by ultrasound biomicroscopy. In our study, the tilt aberrations of the VA-60BBR and VA-70 AD IOLs increased significantly with the extensions but the tilt aberration of the X-60 and X-70 IOLs did not increase.…”

Section: Discussionmentioning

confidence: 99%

Effects of optical diameter of intraocular lenses with intrascleral fixation on higher-order aberrations

et al. 2017

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Background: Intrascleral 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. Methods: Three-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. Results: The 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. Conclusion: When 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.

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“…[ 43 ] UBM has been used in IOLs patient assessment (nonsutured and sutured fixation of IOL) measuring anterior chamber depth, sulcus-to-sulcus diameter, capsular bag thickness, capsular bag diameter, ciliary ring diameter, ciliary process-capsular bag distance, ciliary apex-capsular bag plane, IOL tilting, haptic location, iris-IOL contact, vitreous incarceration, and conducting a scleral fixation assessment. [ 44 45 ]…”

Section: Ultrasound Biomicroscopymentioning

confidence: 99%

Cornea and anterior eye assessment with slit lamp biomicroscopy, specular microscopy, confocal microscopy, and ultrasound biomicroscopy

Martín

2018

Indian J Ophthalmol

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Ultrasound Biomicroscopy Comparison ofAb InternoandAb ExternoIntraocular Lens Scleral Fixation

Cited by 3 publications

References 19 publications

Observational study of intraocular lens tilt in sutureless intrascleral fixation versus standard transscleral suture fixation determined by ultrasound biomicroscopy

Observational study of intraocular lens tilt in sutureless intrascleral fixation versus standard transscleral suture fixation determined by ultrasound biomicroscopy

Effects of optical diameter of intraocular lenses with intrascleral fixation on higher-order aberrations

Cornea and anterior eye assessment with slit lamp biomicroscopy, specular microscopy, confocal microscopy, and ultrasound biomicroscopy

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