MODIFIED CARLEVALE IOL FIXATION TECHNIQUE

Purpose. To compare short-term clinical outcomes between two different intraocular lens (IOL) types in the flanged IOL fixation technique. Methods. This study was a retrospective case series and included the patients who underwent flanged IOL fixation between June 2017 and July 2018 at the Hiroshima University Hospital. Two different 3-piece IOLs (NX-70 and PN6A) were used. Recipients of NX-70 and PN6A IOLs were classed into groups 1 (15 eyes) and 2 (25 eyes), respectively. Patient characteristics, surgical results, and postoperative complications were analyzed. We excluded patients with a postoperative follow-up of <1 month. Results. The mean follow-up period was 13.3 ± 11.7 weeks. The postoperative best corrected visual acuity, in logarithm of the minimum angle of resolution (logMAR), was 0.10 ± 0.33 in group 1 and 0.26 ± 0.42 in group 2. The mean operation times for groups 1 and 2 were 11.2 ± 4.54 minutes and 7.00 ± 2.20 minutes, respectively (p=0.0024). Detachment of the IOL haptic from the optic during surgery occurred in four eyes in group 2 (16%), but did not occur in group 1. Iris capture of the optic was observed in 3 of the 13 eyes (23%) without a peripheral iridotomy in group 2. No peripheral iridotomies were performed on group-1 eyes, but iris capture did not occur in that group. Conclusions. There was a trend to fewer intraoperative and postoperative complications when using NX-70 IOLs. On the other hand, PN6A IOLs was easy to maneuver within the anterior chamber, and the operation time was shorter when using PN6A IOLs. Selection of optimal IOLs for flanged IOL fixation necessitates an understanding of their characteristics in terms of intraoperative and postoperative complications.

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Via pars plana anterior iris enclavation IOL fixation

International Journal of Ophthalmology ◽

10.18240/ijo.2021.05.20 ◽

2021 ◽

Vol 14 (5) ◽

pp. 774-776

Author(s):

Tomaso Caporossi ◽

◽

Giancarlo Albani ◽

Francesco Barca ◽

Fabrizio Giansanti ◽

...

Keyword(s):

Pars Plana Vitrectomy ◽

Spherical Equivalent ◽

Choroidal Detachment ◽

Fixation Technique ◽

Corrected Visual Acuity ◽

Pars Plana ◽

The Mean ◽

A Prospective Study ◽

Iol Fixation ◽

Best Corrected Visual Acuity

AIM: To describe a via pars plana anterior iris enclavation intraocular lens (IOL) fixation technique METHODS: A total of 35 consecutive aphakic vitrectomised patients (average age 71.12±10.12y) underwent pars plana vitrectomy (PPV) and via pars plana anterior iris enclavation IOL fixation. RESULTS: The mean preoperative best corrected visual acuity (BCVA) was 0.11±0.14 logMAR, the mean postoperative BCVA was 0.07±0.11 logMAR. The preoperative mean spherical equivalent was 7.22±4.21 D. The final mean spherical equivalent was -0.25±0.15 D. No eyes had hypotony, retinal or choroidal detachment or endophthalmitis. CONCLUSION: This technique may be a safe and useful in the case of aphakia, and a prospective study would be useful to confirm this findings.

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A modified intrascleral intraocular lens fixation technique with fewer anterior segment manipulations: 27-gauge needle-guided procedure with built-in 8-0 absorbable sutures

10.21203/rs.2.11405/v3 ◽

2019 ◽

Author(s):

Yuan Yang ◽

Tengteng Yao ◽

Yali Zhou ◽

Yixiao Wang ◽

Zhaoyang Wang

Keyword(s):

Visual Acuity ◽

Intraocular Lens ◽

Anterior Segment ◽

Vitreous Hemorrhage ◽

Fixation Technique ◽

Absorbable Sutures ◽

Corneal Endothelial Cell Density ◽

Support Methods ◽

Iol Fixation

Abstract Background: To report a modified surgical technique for intrascleral intraocular lens (IOL) fixation with fewer anterior segment manipulations in eyes lacking sufficient capsular support. Methods: Eyes from 14 patients who underwent 27-gauge needle-guided intrascleral IOL fixation with built-in 8-0 absorbable sutures were studied. The 8-0 absorbable sutures were inserted into 27-gauge round needles and used to create sclerotomies at the 4 o’clock and 10 o’clock positions under the scleral flap. The sutures were used to tie knots at the end of each haptic and guide haptic externalization through the sclerotomy. After externalization, a sufficient flange was created at the end of each haptic and fixed under the scleral flaps. The best corrected visual acuity (BCVA), corneal endothelial cell density (ECD), IOL tilt and decentration, previous surgery history, and complications were determined. Results: Fourteen cases were analyzed. The majority of eyes exhibited an improvement in the BCVA after surgery. When comparing the last follow-up to preoperative visual acuity, the mean change in BCVA was + 26.32 letters (p=0.011). Postoperative complications included postoperative hypotony in 3 eyes, ocular hypertension in 2 eyes. No cases of postoperative cystoid macular edema (CME), vitreous hemorrhage (VH), IOL dislocation, or endophthalmitis were observed. Conclusions: The 27-gauge needle-guided intrascleral IOL fixation technique with built-in 8-0 absorbable sutures is easy to perform with fewer anterior chamber manipulations and achieves both anatomical and optical stability.

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A modified intrascleral intraocular lens fixation technique with fewer anterior segment manipulations: 27-gauge needle-guided procedure with built-in 8-0 absorbable sutures

10.21203/rs.2.11405/v1 ◽

2019 ◽

Author(s):

Yuan Yang ◽

Tengteng Yao ◽

Yali Zhou ◽

Yixiao Wang ◽

Zhaoyang Wang

Keyword(s):

Visual Acuity ◽

Intraocular Lens ◽

Anterior Segment ◽

Vitreous Hemorrhage ◽

Fixation Technique ◽

Absorbable Sutures ◽

Support Methods ◽

Iol Fixation ◽

Iol Dislocation

Abstract Background To report a modified surgical technique for intrascleral intraocular lens (IOL) fixation with fewer anterior segment manipulations in eyes lacking sufficient capsule support. Methods Eyes from 14 patients who underwent 27-gauge needle-guided intrascleral IOL fixation with built-in 8-0 absorbable sutures were studied. The 8-0 absorbable sutures were inserted into 27-gauge round needles and used to create angled sclerotomies at the 4 o’clock and 10 o’clock positions under the scleral flap. The sutures were used to tie knots at the ends of the haptics and guide haptic externalization through sclerotomy. After externalization, a sufficient flange was created at the end of the haptics and fixed under the scleral flaps. The best corrected visual acuity (BCVA), previous surgery history, and complications were determined. Results Fourteen cases were analyzed. The majority of eyes exhibited an improvement in BCVA after surgery. When comparing the last follow-up to preoperative visual acuity, the mean change in BCVA was + 26.32 letters (p=0.011). Postoperative complications included postoperative hypotony in 3 eyes, ocular hypertension in 2 eyes. No postoperative cystoid macular edema, vitreous hemorrhage, IOL dislocation, or endophthalmitis was observed. Conclusions The 27-gauge needle-guided intrascleral IOL fixation technique with built-in 8-0 absorbable sutures is easy to manipulate with fewer anterior chamber manipulations and achieves both anatomical and optical stability.

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A modified intrascleral intraocular lens fixation technique with fewer anterior segment manipulations: 27-gauge needle-guided procedure with built-in 8-0 absorbable sutures

10.21203/rs.2.11405/v4 ◽

2019 ◽

Author(s):

Yuan Yang ◽

Tengteng Yao ◽

Yali Zhou ◽

Yixiao Wang ◽

Zhaoyang Wang

Keyword(s):

Visual Acuity ◽

Intraocular Lens ◽

Anterior Segment ◽

Vitreous Hemorrhage ◽

Fixation Technique ◽

Absorbable Sutures ◽

Corneal Endothelial Cell Density ◽

Support Methods ◽

Iol Fixation

Abstract Background: To report a modified surgical technique for intrascleral intraocular lens (IOL) fixation with fewer anterior segment manipulations in eyes lacking sufficient capsular support. Methods: Eyes from 14 patients who underwent 27-gauge needle-guided intrascleral IOL fixation with built-in 8-0 absorbable sutures were studied. The 8-0 absorbable sutures were inserted into 27-gauge round needles and used to create sclerotomies at the 4 o’clock and 10 o’clock positions under the scleral flap. The sutures were used to tie knots at the end of each haptic and guide haptic externalization through the sclerotomy. After externalization, a sufficient flange was created at the end of each haptic and fixed under the scleral flaps. The best corrected visual acuity (BCVA), corneal endothelial cell density (ECD), IOL tilt and decentration, previous surgery history, and complications were determined. Results: Fourteen cases were analyzed. The majority of eyes exhibited an improvement in the BCVA after surgery. When comparing the last follow-up to preoperative visual acuity, the mean change in BCVA was + 26.32 letters (p=0.011). Postoperative complications included postoperative hypotony in 3 eyes, ocular hypertension in 2 eyes. No cases of postoperative cystoid macular edema (CME), vitreous hemorrhage (VH), IOL dislocation, or endophthalmitis were observed. Conclusions: The 27-gauge needle-guided intrascleral IOL fixation technique with built-in 8-0 absorbable sutures is easy to perform with fewer anterior chamber manipulations and achieves both anatomical and optical stability.

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A modified intrascleral intraocular lens fixation technique with fewer anterior segment manipulations: 27-gauge needle-guided procedure with built-in 8–0 absorbable sutures

BMC Ophthalmology ◽

10.1186/s12886-019-1239-2 ◽

2019 ◽

Vol 19 (1) ◽

Author(s):

Yuan Yang ◽

Teng-teng Yao ◽

Ya-li Zhou ◽

Yi-xiao Wang ◽

Zhao-yang Wang

Keyword(s):

Visual Acuity ◽

Intraocular Lens ◽

Anterior Segment ◽

Vitreous Hemorrhage ◽

Fixation Technique ◽

Absorbable Sutures ◽

Corneal Endothelial Cell Density ◽

Iol Fixation ◽

Iol Dislocation

Abstract Background To report a modified surgical technique for intrascleral intraocular lens (IOL) fixation with fewer anterior segment manipulations in eyes lacking sufficient capsular support. Methods Eyes from 14 patients who underwent 27-gauge needle-guided intrascleral IOL fixation with built-in 8–0 absorbable sutures were studied. The 8–0 absorbable sutures were inserted into 27-gauge round needles and used to create sclerotomies at the 4 o’clock and 10 o’clock positions under the scleral flap. The sutures were used to tie knots at the end of each haptic and guide haptic externalization through the sclerotomy. After externalization, a sufficient flange was created at the end of each haptic and fixed under the scleral flaps. The best corrected visual acuity (BCVA), corneal endothelial cell density (ECD), IOL tilt and decentration, previous surgery history, and complications were determined. Results Fourteen cases were analyzed. The majority of eyes exhibited an improvement in the BCVA after surgery. When comparing the last follow-up to preoperative visual acuity, the mean change in BCVA was + 26.32 letters (p = 0.011). Postoperative complications included postoperative hypotony in 3 eyes, ocular hypertension in 2 eyes. No cases of postoperative cystoid macular edema (CME), vitreous hemorrhage (VH), IOL dislocation, or endophthalmitis were observed. Conclusions The 27-gauge needle-guided intrascleral IOL fixation technique with built-in 8–0 absorbable sutures is easy to perform with fewer anterior chamber manipulations and achieves both anatomical and optical stability.

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A modified intrascleral intraocular lens fixation technique with fewer anterior segment manipulations: 27-gauge needle-guided procedure with built-in 8-0 absorbable sutures

10.21203/rs.2.11405/v2 ◽

2019 ◽

Author(s):

Yuan Yang ◽

Tengteng Yao ◽

Yali Zhou ◽

Yixiao Wang ◽

Zhaoyang Wang

Keyword(s):

Visual Acuity ◽

Intraocular Lens ◽

Anterior Segment ◽

Vitreous Hemorrhage ◽

Fixation Technique ◽

Absorbable Sutures ◽

Corneal Endothelial Cell Density ◽

Support Methods ◽

Iol Fixation

Abstract Abstract Background : To report a modified surgical technique for intrascleral intraocular lens (IOL) fixation with fewer anterior segment manipulations in eyes lacking sufficient capsular support. Methods : Eyes from 14 patients who underwent 27-gauge needle-guided intrascleral IOL fixation with built-in 8-0 absorbable sutures were studied. The 8-0 absorbable sutures were inserted into 27-gauge round needles and used to create sclerotomies at the 4 o’clock and 10 o’clock positions under the scleral flap. The sutures were used to tie knots at the end of each haptic and guide haptic externalization through the sclerotomy. After externalization, a sufficient flange was created at the end of each haptic and fixed under the scleral flaps. The best corrected visual acuity (BCVA), corneal endothelial cell density (ECD), IOL tilt and decentration, previous surgery history, and complications were determined. Results: Fourteen cases were analyzed. The majority of eyes exhibited an improvement in the BCVA after surgery. When comparing the last follow-up to preoperative visual acuity, the mean change in BCVA was + 26.32 letters (p=0.011). Postoperative complications included postoperative hypotony in 3 eyes, ocular hypertension in 2 eyes. No cases of postoperative cystoid macular edema (CME), vitreous hemorrhage (VH), IOL dislocation, or endophthalmitis were observed. Conclusions : The 27-gauge needle-guided intrascleral IOL fixation technique with built-in 8-0 absorbable sutures is easy to perform with fewer anterior chamber manipulations and achieves both anatomical and optical stability.

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Decentration of Posterior Chamber Iol: Effects of Loop Material and Fixation Technique

European Journal of Ophthalmology ◽

10.1177/112067219400400206 ◽

1994 ◽

Vol 4 (2) ◽

pp. 111-114 ◽

Cited By ~ 5

Author(s):

S. Fruscella ◽

P. Ducoli ◽

G.L. Manni

Keyword(s):

Prospective Study ◽

Cataract Extraction ◽

Posterior Chamber ◽

Extracapsular Cataract Extraction ◽

Fixation Technique ◽

Iol Implantation ◽

The Difference ◽

A Prospective Study ◽

Posterior Chamber Iol ◽

Iol Fixation

A prospective study was conducted on 90 eyes undergoing extracapsular cataract extraction and posterior chamber IOL implantation. Postoperative IOL decentration was evaluated with respect to the loop material, either polypropylene (prolene) or polymethylmethacrylate (PMMA), and the IOL fixation technique, either in the capsular sac (in-the-bag) after capsulorhexis, or in the ciliary sulcus after “can-opener” capsulotomy. More decentration was observed with IOL having polypropylene loops than with those having PMMA loops (0.80 ± 0.735 mm versus 0.373 ± 0.299 mm). IOL implanted in the bag showed greater decentration than those implanted in the sulcus, but the difference was not significant. Our findings confirm the recommendation to use an IOL with PMMA loops when placing the implant in the capsular sac.

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A Modified Intrascleral Intraocular Lens Fixation Technique Using 27-Gauge Blunted Needles with Fewer Intraocular Manipulations

Journal of Ophthalmology ◽

10.1155/2021/6791977 ◽

2021 ◽

Vol 2021 ◽

pp. 1-6

Author(s):

Kazuya Morino ◽

Yuto Iida ◽

Masayuki Akimoto

Keyword(s):

Retrospective Study ◽

Intraocular Lens ◽

New Method ◽

Fixation Technique ◽

Scleral Flap ◽

Operation Room ◽

Scleral Tunnel ◽

Iol Fixation ◽

Sclerotomy Site

A new method for intraocular lens (IOL) fixation in the scleral tunnel using two common 27G blunted needles and an ultrathin 30G needle with fewer intraocular manipulations was developed. Half-depth scleral flaps were prepared, and vertically angled sclerotomies were performed under each scleral flap, 2 mm from the limbs with a 20G microblade or a 26G needle. Two bent 27G blunted needles connected the sclerotomy and corneoscleral incisions. One haptic was inserted into this bent 27G blunted needle extraocularly and extruded through the sclerotomy site. Each haptic was inserted into the lumen of the preplaced ultrathin 30G needle and buried into the scleral tunnel. In this retrospective study, we reviewed the outcomes of this new technique in patients with at least 3 months’ follow-up data. Iris capture of the IOL was not observed in any case, and IOL repositioning was not performed either. Astigmatism induced by intraocular aberration was almost as same as that with other methods. Our technique can be performed in any operation room without any extra instruments. This trial is registered with UMIN000044350.

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Triple Fixation For Electron Microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100100196 ◽

1968 ◽

Vol 26 ◽

pp. 90-91 ◽

Cited By ~ 1

Author(s):

M. A. Hayat

Keyword(s):

Electron Microscopy ◽

Endoplasmic Reticulum ◽

Electron Beam ◽

Plasma Membrane ◽

Myelin Sheath ◽

Good Deal ◽

Granular Structure ◽

Oxidizing Agent ◽

Fixation Technique ◽

Large Clusters

Potassium permanganate has been successfully employed to study membranous structures such as endoplasmic reticulum, Golgi, plastids, plasma membrane and myelin sheath. Since KMnO4 is a strong oxidizing agent, deposition of manganese or its oxides account for some of the observed contrast in the lipoprotein membranes, but a good deal of it is due to the removal of background proteins either by dehydration agents or by volatalization under the electron beam. Tissues fixed with KMnO4 exhibit somewhat granular structure because of the deposition of large clusters of stain molecules. The gross arrangement of membranes can also be modified. Since the aim of a good fixation technique is to preserve satisfactorily the cell as a whole and not the best preservation of only a small part of it, a combination of a mixture of glutaraldehyde and acrolein to obtain general preservation and KMnO4 to enhance contrast was employed to fix plant embryos, green algae and fungi.

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