Internal Limiting Membrane Peeling Research Articles

Prospective Evaluation of Results of Surgical Treatment of Patients with Idiopathic Macular Hole by Phacovitrectomy and Combined Cataract and Vitrectomy Surgery

Purpose of the study:The purpose of the study was to compare the morphological and functional results of the studied patients with idiopathic macular hole treated with a one-stage method (phacovitrectomy) and combined cataract and vitrectomy surgery.Material and methods:The study included 33 patients (33 eyes) with idiopathic macular hole treated at the Department of Retina and Vitreous Surgery in Lublin. Twenty-one eyes were surgically treated with phacovitrectomy (Group 1 MH). Twelve patients underwent two-stage, combined treatment with removal of the lens in the first stage and vitrectomy in the second (Group 2 MH). The assignment of patients to groups was random. All patients underwent 23-gauge sutureless vitrectomy with removal of the internal limiting membrane (internal limiting membrane peeling). SF6 gas was used as an intraocular tamponade at an isovolumetric concentration of 20% and face down position recommendation for 7 days. Cataract surgery was performed using the phacoemulsification method with an incision in the transparent part of the cornea with intracapsular, posterior chamber implantation of a monofocal lens. A 12-month observation period was established, measured from the date of vitrectomy performance, and in the case of a combined procedure, this period was extended by the time between each stage of treatment. At subsequent check-ups, the subjects underwent a complete ophthalmological examination, which included: best corrected distance visual acuity and best corrected near visual acuity, assessment of the anterior and posterior segments, in a slit lamp, measurement of retinal sensitivity in the macula using microperimetry, the Amsler test and optical coherence tomography examination of the macula.Results:In patients of the total studied group, an improvement in the best-corrected visual distance and near acuity was obtained, and in 88% retinal sensitivity in the macula was also achieved. In the group of patients subjected to phacovitrectomy (Group 1 macular hole) with an average minimum hole diameter of 487.48 µm before the procedure, after a one-year follow-up the mean best corrected distance visual acuity was 0.57 and best corrected near visual acuity 0.51, with macular retinal sensitivity of 26.65 dB. However, in the group of patients subjected to combined cataract and vitrectomy, an average minimum hole diameter of 521.58 µm 12 months after trans pars plana vitrectomy was performed as well as an average best corrected distance visual acuity of 0.64, best corrected near visual acuity of 0.5, and retinal sensitivity in the macula of 25.98 dB. There were no statistically significant differences between phacovitrectomy and the combined procedures in terms of the improvement in the values of distance and near visual acuity and macular retinal sensitivity 12 months after trans pars plana vitrectomy. A statistically significant improvement in retinal sensitivity in the macula was observed in Group 1 macular hole during the 12-month follow-up, while in the combined procedure group the improvement was not statistically significant.Conclusions:Vitrectomy is an effective method of treating maculopathy in the form of macular hole. Morphological and functional improvement was noted in all patients, regardless of the treatment method used. There were no statistically significant differences between phacovitrectomy and the combined procedure in terms of the improvement achieved in the values of distance visual acuity parameters, near vision and retinal sensitivity in the macula 12 months after trans pars plana vitrectomy. A common feature of patients with worse results on individual variables was a longer duration of the disease and a larger size of the hole prior vitrectomy.

Pedicle transposition flap, inverted flap, free flap, and standard peel for large full thickness macular holes: a comparative study.

Purpose: To compare anatomical and functional outcomes of four different techniques for the treatment of large idiopathic full-thickness macular holes (FTMH). Methods: Single-centre retrospective study including 129 eyes of 126 patients with large (>500μm) FTMH between January 2018-October 2022. All patients underwent 23/25G vitrectomy and gas with standard internal limiting membrane (ILM) peel, pedicle transposition, inverted, or free flap technique. Postoperative OCT images were assessed by 2 independent masked graders. Results: Mean age was 73.2 years (SD 8.4) with median F/U of 5 months (IQR 8). Overall anatomical success rate was 81%; significantly lower (59%) for the standard ILM peel (p<0.0001). The pedicle transposition flap showed superior visual recovery compared to the free flap (+27 vs +12 ETDRS letters, p=0.02). At 3 months, restoration of the ELM was significantly better for the pedicle transposition flap compared to free flap and standard ILM peel (p=0.008 and p=0.03), and superior to all the other techniques at 6 months (p=0.02, p=0.04 and p=0.006). Conclusions: Standard ILM peel alone offers inferior outcomes for the management of large FTMH. Of the alternative ILM techniques, despite similar closure rates, foveal microstructural recovery is most complete following the pedicle transposition flap, and least complete following the free flap.

Abnormal Vitreoretinal Interface Leading to Macular Hole–Associated Retinal Detachment in Straatsma Syndrome

Introduction: To report a case of macular hole (MH)–associated retinal detachment (RD) with Straatsma syndrome. Methods: A clinical case was retrospectively reviewed. Results: A 39-year-old woman with Straatsma syndrome was treated for an MH-associated RD. The MH was closed with vitrectomy and internal limiting membrane peeling, during which an unusually strong vitreoretinal adhesion was encountered in the area of myelinated nerve fibers. One day postoperatively, the patient developed serous choroidal effusions and a serous RD, which resolved by postoperative week 1. The patient’s vision ultimately returned to baseline. Conclusions: The presence of an unusually strong vitreoretinal adhesion in the area of myelinated nerve fibers and the development of postoperative serous RD suggest that myelination may contribute to vitreoretinal adhesion and the development of MHs in Straatsma syndrome.

Randomized Trial Comparing Micro-Serrated versus Conventional Internal Limiting Membrane Forceps for Internal Limiting Membrane Peeling

Purpose: To evaluate macular findings and surgeon evaluation regarding the use of micro-serrated (SharkskinTM, Alcon, Forth Worth, TX) internal limiting membrane (ILM) forceps compared to conventional (Grieshaber® (Alcon)) ILM forceps for peeling of the ILM. Methods: Patients were prospectively assigned in a 1:1 randomized fashion to undergo ILM peeling using the micro-serrated forceps or conventional forceps. Rates of retinal hemorrhages, deep retinal grasps, ILM regrasping, time to ILM removal, and surgeon questionnaire comparing the use of micro-serrated and conventional ILM forceps. Results: A total of 90 eyes of 90 patients were included in the study. The mean number of deep retinal grasps was higher in the conventional forceps group (1.51 ± 1.70 versus 0.33 ± 0.56, respectively [p < 0.0001]). The mean number of failed ILM grasps was higher with conventional forceps (6.62 ± 3.51 versus 5.18 ± 2.06 [p = 0.019]). Micro-serrated forceps provided more comfortability (lower number) in initiating the ILM flap (2.16 ± 0.85 versus 1.56 ± 0.76, [p < 0.001]), comfortability in regrasping the ILM flap was (2.51 ± 1.01 versus 1.98 ± 0.89, p = 0.01), and comfortability in completing the ILM flap (2.42 ± 1.03 versus 1.84 ± 1.02, p = 0.01). Conclusion: Surgeons utilizing the micro-serrated forceps experienced fewer deep retina grasps and fewer failed ILM grasps using compared to conventional ILM forceps. The micro-serrated forceps was also a more favorable experience subjectively amongst the surgeons.

A NOVEL SURGICAL TECHNIQUE FOR GIANT AND REFRACTORY MACULAR HOLES: AUTOLOGOUS TENON CAPSULE PLUG

Purpose: To evaluate the safety and efficiency of the autologous Tenon capsule plug (ATCP) technique for the treatment of large (1000 um<) and refractory macular holes (MHs). Methods: This retrospective, interventional, case series included 3 patients who underwent 23-gauge vitrectomy and ATCP technique for giant or refractory MH. All patients underwent a complete ophthalmic examination including optical coherence tomography (OCT), OCT angiography (OCTA), and microperimetry (MP). The changes in retinal structure and function were evaluated. Results: The minimum follow-up was 6 months. The preoperative minimum hole diameters were 728 um, 422 um, and 1154 um for case 1, case 2, and case 3 respectively. Case 1 and case 2 had an idiopathic MH that failed to close after vitrectomy with (internal limiting membrane) ILM peeling, whereas case 3, who had a giant, irregular MH underwent the ATCP technique as the primary intervention. Complete hole closure was achieved in all patients at the last follow-up. However, case 1 required a second ATCP surgery due to dislodgement of the plug in the early postoperative period. The BCVA increased in all patients. The final MP analysis revealed that the percentage of fixation points at circles 4o for case 1, case 2 and case 3 were 93.5%, 99.9% and 95.6% respectively. Conclusions: We suggest that the ATCP technique can provide a simple, cheap, repeatable, and readily available surgical solution for the treatment of giant and refractory macular holes. Further prospective studies with a larger sample size are needed to confirm our preliminary results.

Short-term results of surgical treatment in large idiopathic macular hole cases.

To evaluate results of the surgical treatment for large stage (Stage 3 and 4) idiopathic macular hole cases with and without ILM flap technique. Sixty eyes of 60patients diagnosed with idiopathic macular hole (MH) were included in the study. Complete ophthalmologic examination and SD-OCT examination were performed in all eyes. MH stages, MH base diameter, height and closest distance were measured quantitatively. Postoperative and 3months visits were evaluated. The mean age of the cases was 65.0 ± 8.0 (range 30-84) years, there were 31 (51.7%) female and 29 (48.3%) male patients with a mean follow-up period of 18.1 ± 16.7 (range 3-63)months. The mean best corrected visual acuity recorded at preoperative and third month control visits were 0.89 ± 0.40(preoperative) logMAR, 0.82 ± 0.60(3month) logMAR (p < 0.05). The mean MH index was 0.48 ± 0.16, the closest hole distance was 517.86 ± 210.89µm and mean basal diameter of holes was 947.78 ± 361.90µm and the average height was 448.93 ± 79.80 microns. There was no statistically significant difference between anatomic results of macular hole surgery with (n = 22) and without (n = 38) flap in terms of hole closure (86.4% vs. 92.1% p > 0.05). In 90% (54 cases) of the cases, closure was observed after the first surgery. Two eyes that failed macular hole surgery were reoperated. In one of these eyes, anatomical success was obtained with macular hole massage and mechanical cytumulation. However, anatomical success could not be achieved in the other eye. CONCLUSıON: In the treatment of large macular holes, pars plana vitrectomy, internal limiting membrane peeling with/without flap and gas tamponade demonstrated high anatomical and functional success.

THE EFFECT OF INTERNAL LIMITING MEMBRANE PEELING ON THE INNER RETINAL LAYERS IN PATIENTS WITHOUT MACULAR PATHOLOGIC CONDITION.

To examine the effect of internal limiting membrane peeling on the inner retinal layers in patients without macular pathological condition. A prospective nonrandomized trial of patients undergoing pars plana vitrectomy with internal limiting membrane peeling for pathologic condition outside the macula was performed. Optical coherence tomography including macular ganglion cell layer, inner plexiform layer, and peripapillary retinal nerve fiber layer imaging was performed before surgery, 1, 3, and 6 months postoperatively, and at the end of follow-up (ranges between 4 and 17 months). Patients with any macular pathological condition on optical coherence tomography before surgery were excluded. The main outcome measure was change in thickness of the ganglion cell layer and inner plexiform layer. Ten patients who underwent pars plana vitrectomy with internal limiting membrane peeling for macula-on retinal detachment were included in the analysis. The mean age was 55 years, and the mean follow up was 10.8 months. All patients completed at least two postoperative follow-up visits that included an optical coherence tomography as per the protocol (range 2-6 months). There was an immediate reduction in the global (G), inferotemporal, superotemporal, and superior (S) ganglion cell layer thickness at the first follow up as compared with the preoperative state ( P = 0.028, P = 0.027, P = 0.026, and P = 0.027 respectively). From the first follow-up visit onward until the final follow-up, the thinning persisted, although there was no further statistically significant thinning. Peeling of the internal limiting membrane causes significant ganglion cell layer thinning in maculae without pathologic condition before surgery. At up to 17 months of follow-up, this effect seems to be immediate and nonprogressive.

Macular hole surgery follow-up with spectral domain-optical coherence tomography-guided facedown posturing.

The main treatment for macular hole (MH) is pars plana vitrectomy, with or without internal limiting membrane (ILM) peeling, followed by gas tamponade and face-down positioning (FDP). This study aims to present the anatomical and visual outcomes following MH repair with optical coherence tomography (OCT)-guided FDP. Thirty-two patients who underwent surgery for idiopathic MH were enrolled. The requirement for the prone position was lifted for those with MH closure observed under gas on postoperative day one OCT. Patients with unclosed MHs were instructed to maintain FDP until the 3rd day. Best-corrected visual acuity at preoperative, postoperative 1st month, and the last visit, closure time post-surgery, duration of prone position, and surgical success rate were recorded. Among the patients, 21 underwent phacovitrectomy + ILM peeling + gas tamponade, while 11 had vitrectomy + ILM peeling + gas tamponade. On postoperative day one, 28 out of 32 MHs closed, with 3 closures on day 3 and one on day 5. There were 18 stage two (56.3%), 13 stage three (40.6%) and 1 stage four (3.1%) MHs. The mean minimum MH diameter was 381.75 ± 68.07 (min 260-max 517) microns. All patients with MH closure time over postoperative day one had non-combined vitrectomy instead of phacovitrectomy. No late complications were observed. OCT-guided FDP approach yields excellent closure rates with no late complications and ensures good patient comfort.

Selective internal limiting membrane peeling for prevention of secondary epiretinal membrane after vitrectomy for rhegmatogenous retinal detachment.

We introduce selective internal limiting membrane (ILM) peeling, a guideline procedure to determine whether to remove the ILM during vitrectomy for rhegmatogenous retinal detachment (RRD). Retrospective case series METHODS: Patients who underwent pars plana vitrectomy for RRD and were followed up for 12 months or longer were included. When vitreous cortex remnants (VCRs) were detected with triamcinolone acetonide, the ILM was removed; otherwise, the ILM was preserved ("selective ILM peeling"). The factors associated with the presence of VCRs and incidence of secondary epiretinal membrane (ERM) were analyzed. VCRs were detected in 87 of 133 eyes (65.4%) in which the ILM was removed. Younger age, better preoperative visual acuity, and vitreous hemorrhage were negatively correlated with the presence of VCRs.No ERM occurred in the eyes after ILM peeling. Among the eyes with ILM preservation, subclinical ERM was noticed in 4 eyes (8.7%), and 1 eye (2.1%) required additional surgery owing to ERM. ERM occurred more commonly in eyes with the ILM preserved (P = .004). However, no differences in the rate of additional surgeries were found between the 2 groups. Selective ILM peeling offers an alternative option to reduce the burden of ILM peeling or additional surgery.

Outcomes of 25-Gauge Pars Plana Vitrectomy in the Treatment of Idiopathic Macular Hole

Aim: The main aim of this study is to evaluate the anatomical and functional results of pars plana vitrectomy (PPV) with peeling of the internal limiting membrane (ILM), membrane blue staining and subsequent expansile gas tamponade (perfluoropropane) in the treatment of idiopathic macular hole (IMH). Material and methods: The retrospective analysis consisted of 100 eyes of a total of 100 patients (61 women and 39 men) with IMH, operated on at the Department of Ophthalmology of the Slovak Medical University and University Hospital Bratislava from 1 January 2021 to 1 January 2024, using 25-gauge PPV with ILM peeling and perfluoropropane tamponade (C3F8) of 15% concentration. After surgery, the patients were required to remain in a face-down position for at least one week. Best corrected visual acuity (BCVA), minimal linear diameter (MLD) on optic coherence tomography, macular hole closure type and occurrence of complications were evaluated. The obtained results were expressed with the use of arithmetic averages and displayed in graphs. Results: Primary closure of macular hole was achieved in 93 patients (93%). The most frequently occurring type of closure was 1A. After surgery, the BCVA of all patients improved, from an average value of 0.101 preoperatively to 0.300 one year after surgery. In all groups of patients (regardless of the size of the macular hole before surgery), during the one-year follow-up period there was a gradual increase in BCVA with its stabilization by 6 months. The main factors that influenced postoperative BCVA were the preoperative values of MLD and BCVA. Conclusion: PPV with ILM peeling and perfluoropropane tamponade is an effective treatment for idiopathic macular holes with a success rate of more than 90%. This surgical procedure, associated with a relatively low number of complications, brings patients a definite improvement of BCVA.

Outcomes of different surgical procedures for optic disc pit: a meta-analysis

Objective To assess the surgical outcomes of pars plana vitrectomy (PPV) in conjunction with various adjuvant procedures for optic disc pit maculopathy (ODPM). Methods We conducted a literature search to identify clinical studies and case series of surgically treated OPM patients. (1) greater than two patients, (2) surgical treatment and (3) reporting of pre and postoperative visual acuity data were inclusion criteria. We excluded review articles and studies unavailable in the English language. One-way analysis of variance, Pearson’s chi-squared test and straightforward linear regression were used to analyze the results. Results A total of 838 studies were initially identified as potentially relevant studies. After removing duplicates and screening titles and abstracts, the eligibility of 86 full-text articles was evaluated. There were 50 studies included in the meta-analysis. We identified the following commonly reported techniques: juxtapapillary laser alone, PPV alone or with juxtapapillary laser (PPV/JPL), internal limiting membrane peeling (PPV/ILMP), both ILMP and JPL (PPV/ILMP/JPL), inner retinal fenestration (PPV/IRF), autologous platelet concentrate (PPV/APC), macular buckling alone or with PPV, PPV with ocriplasmin (PPV/OCR) and PPV with autologous scleral flap. All groups showed an improvement in best-corrected visual acuity compared with baseline, with no significant differences between groups. The average OPM resolution rate for all groups was 70% (range: 56–100%), and the average resolution duration was 9.1 months. Central macular thickness was diminished in the PPV, PPV/JPL, and PPV/ILMP groups, but there were no significant differences between groups. There was no effect on the outcomes. Analyses of linear regression revealed significant correlations between preoperative best-corrected visual acuity and the aforementioned outcome measures. The rate of complete anatomic success and visual improvement following PPV is ∼85%. Anatomic and visual success rates for PPV alone are 89% and 100%, respectively, according to subgroup analysis. Gas tamponade, laser and ILMP during vitrectomy are less promising, whereas PPV with ILM flap stuffing may yield better results than cases without it. Conclusion We did not find a significant difference in functional outcomes between the various surgical procedures used to treat OPM. Based on the available evidence, PPV is effective for ODPM, while gas tamponade, laser and ILMP should be used with caution. This study is limited by its reliance on retrospective studies and publication bias towards positive outcomes.

Internal limiting membrane peeling in vitreoretinal surgery for rhegmatogenous retinal detachment: clinical results, surgical options, and future prospects

Rhegmatogenous retinal detachment (RRD) is one of the leading causes of primary vision disability, while the majority of RRD patients with RRD are people of active working age. Over the past 50 years, retinal detachment surgery has been progressing rapidly, the rate of success increasing up to 90% or higher. However, the reduction of reoperation risks of reoperations, improvement of functional outcomes and increase of postoperative visual acuity remain topical issues. The main reason for repeated surgical interventions is the proliferative vitreoretinopathy progression, which can lead to epiretinal fibrosis, macular oedema, or retinal detachment recurrence. The review is focused on current literature studies that report the results of internal limiting membrane peeling in cases of RRD surgeries and other optional techniques aimed at reducing the risk of the above mentioned postoperative complications.

Comparison of the use of internal limiting membrane flaps versus conventional ILM peeling on post-operative anatomical and visual outcomes in large macular holes.

Idiopathic full-thickness macular hole (iFTMH) closure rates following conventional vitrectomy, gas tamponade and internal limiting membrane (ILM) peeling decrease when the minimum linear diameter (MLD) ≥ 500 microns. ILM flap creation has been proposed to improve closure in larger holes. This study evaluated the anatomical and functional impact of ILM flap introduction to routine practice in iFTMH ≥500 microns. Retrospective, interventional analysis of prospectively collected data of 191 eyes from consecutive surgeries for primary iFTMH ≥500 microns performed by two surgeons between June 2018 and June 2022, during which both surgeons replaced ILM peeling with ILM flap creation. Post-operative best-corrected visual acuity (BCVA) and anatomical closure were compared between Group 1 (ILM peel) and Group 2 (ILM flap) in an intention-to-treat analysis. Rates of iFTMH closure were greater in the ILM flap group (77/80; 96.3%) than the ILM peel group (94/110; 85.5%) (OR = 4.37, 95% CI = 1.23-15.55, p = 0.023). A non-significant increase in post-operative BCVA improvement was observed in the ILM flap group (p = 0.084). There was no statistically significant difference in final BCVA (p = 0.83). Multivariate logistic regression found only MLD (OR = 0.993, 95% CI = 0.989-0.997, p = 0.001) and ILM flap group (OR = 5.795, 95% CI = 1.313-25.570, p = 0.020) predicted primary closure. ILM flap creation improves closure rates in larger holes and should be considered routinely in iFTMH ≥500 microns. Whether ILM flaps affect post-operative visual function remains uncertain.

Internal limiting membrane peeling in rhegmatogenous retinal detachment: A meta-analysis.

To determine whether pars plana vitrectomy (PPV) with internal limiting membrane (ILM) peeling for rhegmatogenous retinal detachment (RRD) could get better functional and anatomical outcomes. A comprehensive literature search was performed to find relevant studies. A meta-analysis was conducted by comparing the weighted mean differences (WMD) in the mean change of best corrected visual acuity (BCVA) from baseline and calculating the odd ratios (OR) for rates of epiretinal membrane (ERM) formation and recurrence of retinal detachment (RD). Fourteen studies were selected, including 2259 eyes (825 eyes in the ILM peeling group and 1434 eyes in the non-ILM peeling group). There was no significant difference in terms of mean change in BCVA from baseline and the rate of RD recurrence (WMD = 0.02, 95% CI, -0.20 to 0.24, P = 0.86, and OR = 0.55, 95% CI, 0.24 to 1.26, P = 0.16), but ILM peeling was associated with a significantly lower frequency of postoperative ERM formation (OR = 0.13, 95% CI, 0.06 to 0.26, P<0.00001). Similar results were obtained in a sub-analysis based on macula-off RRD. ILM peeling results in similar BCVA, with same rate of RD recurrence, but lower rate of postoperative ERM development. ILM peeling could be considered in selected cases with risk factors that are likely to develop an ERM.

Analysis of the therapeutic efficacy of pars plana vitrectomy without intraocular tamponade in the treatment of high myopic eyes with myopic foveoschisis and central foveal detachment

Objective: To investigate the efficacy of pars plana vitrectomy (PPV) without intraocular tamponade in the treatment of high myopic eyes with myopic foveoschisis (MF) accompanied by foveal detachment (FD). Methods: A retrospective case series study was conducted. The medical records of patients diagnosed with unilateral MF accompanied by FD at the Eye & ENT Hospital of Fudan University between May 2018 and December 2021 were collected. All patients underwent 23-gauge PPV with posterior vitreous cortex clearance, and no intraocular tamponade was applied. The cases were divided into groups based on whether the internal limiting membrane was peeled during surgery or retained. Follow-up was conducted for at least 12 months. The main outcome measures included postoperative best-corrected visual acuity (BCVA, converted to logarithm of the minimum angle of resolution), central foveal thickness (CFT), MF resolution, and complications. Statistical analyses were performed using t-tests, chi-square tests, Fisher's exact tests, and univariate and multivariate linear regression. Results: A total of 40 patients (40 eyes) with MF and FD were included in the study, with 30.0% being male and 70.0% female. The mean age was (56.9±11.7) years, and the axial length of the eyes was (29.1±1.9) mm. At 12 months postoperatively, BCVA improved from baseline 1.15±0.58 to 0.73±0.39 (t=6.11, P<0.001), and CFT decreased from baseline (610.1±207.2) μm to (155.9±104.1) μm (t=13.47, P<0.001). Complete resolution of MF with foveal reattachment was observed in 80.0% of eyes, with a median time of 6 (5, 8) months. There was no significant difference in BCVA and CFT between the internal limiting membrane peeled group and retained group [0.68±0.39 vs. 0.79±0.40, t=0.85, P=0.403; (148.3±63.8)vs.(164.3±137.2)um,t=0.48, P=0.634]. One eye experienced macular hole and another eye developed retinal detachment postoperatively. Correlation analysis showed a positive correlation between BCVA at 12 months postoperatively and baseline BCVA (β=0.433, P<0.001). Conclusions: Pars plana vitrectomy without intraocular tamponade is effective in treating MF accompanied by FD. The choice between internal limiting membrane peeling and retention does not significantly affect visual prognosis.

Reflections on the inner limiting membrane peeling and its derivatives in macular hole surgery

Internal limiting membrane (ILM) peeling is a critical step in the process of macular hole surgery, giving rise to various modified techniques such as ILM flip-over coverage, ILM and other tissue tamponade procedures, and foveal-sparing ILM peeling. All these approaches aim to improve the postoperative closure rate of macular holes. The goal of macular hole surgery is to better preserve the integrity of the foveal center structure, with the aim of achieving functional recovery on the basis of anatomical restoration. However, in clinical practice, there is a tendency to excessively choose certain surgical methods solely to pursue the closure rate of the hole, which may not be beneficial for the visual function recovery of the patients. This article discusses how to correctly select the internal limiting membrane and its derivative procedures in macular hole surgery, combining clinical practice and relevant domestic and international research literature. It aims to provide insights for colleagues performing macular hole surgery as a reference regarding this clinical focus issue.

Clinical observation of the intraocular distribution characteristics of indocyanine green after epiretinal membrane peeling using a fluorescence detection system developed in Python

Objective: To utilize a Python-based fluorescence area detection system to observe and quantitatively analyze the intraocular distribution characteristics and metabolic patterns of Indocyanine Green (ICG) following epiretinal membrane peeling. Methods: A prospective case series study was conducted on patients with idiopathic epiretinal membrane undergoing vitrectomy at West China Hospital of Sichuan University from March 2019 to March 2021. ICG staining was applied during surgery for peeling the epiretinal membrane and internal limiting membrane. Patients were followed up at 1 week, 1 month, 3 months, 6 months, and 12 months postoperatively, with assessments including best-corrected visual acuity, intraocular pressure, fundus photography, near-infrared fundus fluorescence imaging (NIR-FF), and optical coherence tomography (OCT). A Python-based ICG intraocular metabolism detection system was developed to measure the residual area of ICG fluorescence on NIR-FF, predict the ICG metabolic pattern equation, and correlate it with postoperative visual acuity and peripapillary retinal nerve fiber layer thickness. Results: A total of 64 patients (64 eyes) were included, with an average age of 64.6±8.4 years, including 25 males (39.1%) and 39 females (60.9%). Preoperative NIR-FF images showed no ICG strong fluorescence. At 1 week postoperatively, diffuse ICG strong fluorescence appeared in the posterior pole, and the internal limiting membrane removal area exhibited a ring-like weak fluorescence. Over time, ICG strong fluorescence was observed along the vascular arch and nerve fiber trajectory, gradually diminishing toward the optic disc, with residual ICG fluorescence still visible at the optic disc at 1 year. The Python-based ICG fluorescence area detection system effectively measured intraocular residual ICG area. A predictive equation for the 12-month residual ICG area was constructed through linear regression analysis (Residual ICG area=0.22 × Residual ICG area at 6 months, R2=16%, P=0.002). Except for a negative correlation between the ICG residual area at 1 month and postoperative visual acuity (P=0.017, r=-0.195), no correlation was found between intraocular ICG fluorescence residual area and postoperative visual acuity or peripapillary retinal nerve fiber layer thickness at other follow-up times (all P>0.05). Conclusions: In patients with idiopathic epiretinal membrane undergoing ICG staining for internal limiting membrane peeling, ICG exhibits characteristic metabolic processes in the eye, with strong fluorescence along the vascular arch and nerve fiber trajectory, gradually converging toward the optic disc over time. The Python-based ICG fluorescence area detection system provides a clear display of the intraocular distribution characteristics of ICG after epiretinal membrane peeling and serves as a tool for predicting the metabolic patterns of ICG in the eye.

Novel surgical approaches for treating myopic traction maculopathy: a meta-analysis

BackgroundMyopic traction maculopathy (MTM) is a complication of pathological myopia and encompasses various pathological conditions caused by tractional changes in the eye. These changes include retinoschisis, foveal retinal detachment, and lamellar or full-thickness macular holes (FTMHs). This meta-analysis evaluated the safety and efficacy of novel surgical for treating MTM.MethodsTo compare the outcomes of different surgical approaches for MTM, multiple databases, including Web of Science, PubMed, Scopus, ClinicalTrials.gov, the Cochrane Central Register of Controlled Trials, Ovid MEDLINE, Embase, and the Meta-Register of Controlled Trials, were comprehensively searched. The meta-analysis was performed using RevMan 5.1.ResultsNine comparative studies involving 350 eyes were included in this meta-analysis. There were significant differences between fovea-sparing internal limiting membrane peeling (FSIP) and standard internal limiting membrane peeling (ILMP). Preoperative best-corrected visual acuity BCVA (standard mean difference (SMD): -0.10, 95% CI: -0.32 to 0.12) and central foveal thickness CFT (SMD: 0.05, 95% CI: -0.22 to 0.33) were not significantly different (p = 0.39 and p = 0.71, respectively). However, the postoperative BCVA improved significantly (SMD = − 0.47, 95% CI: − 0.80, − 0.14, p = 0.006) in the FSIP group compared to the standard ILMP group. Postoperative CFT did not differ significantly between the two groups (p = 0.62). The FSIP group had a greater anatomical success rate than the other groups, although the difference was not statistically significant (p = 0.26). The incidence of postoperative macular hole formation was significantly lower (OR = 0.19, 95% CI = 0.07–0.54; p = 0.05) in the FSIP group than in the standard ILMP group. The unique characteristics of highly myopic eyes, such as increased axial length and structural changes, may have contributed to the greater incidence of FTMH in the ILMP group.ConclusionBased on the findings of this meta-analysis, FSIP is the initial surgical approach for early-stage MTM and has shown promising outcomes. However, to establish the safest and most efficient surgical technique for treating different MTM stages, further comparative studies, specifically those focusing on ILMP and FSIP, are necessary.Trial registrationRetrospectively registered.

Comparison of cognitive workload and surgical outcomes between a three-dimensional and conventional microscope macular hole surgery

BackgroundPerforming a surgical task subjects the surgeon to multitudinal stressors, especially with the newer 3D technology. The quantum of cognitive workload using this modern surgical system in comparison to the Conventional microscope system remains unexplored. We evaluate the surgeon’s cognitive workload and the surgical outcomes of macular hole(MH) surgery performed on a 3D versus a Conventional microscope operating system.Methods50 eyes of 50 patients with MH undergoing surgery using the 3D or Conventional microscope visualization system. Cognitive workload assessment was done by real-time tools(Surgeons’ heart rate [HR] and oxygen saturation[SPO2]) and self-report tool(Surgery Task Load Index[SURG-TLX] questionnaire) of three Vitreoretinal surgeons. Based on the SURG-TLX questionnaire, an assessment of the workload was performed.ResultsOf the 50 eyes, 30 eyes and 20 eyes underwent surgery with the Conventional microscope and the 3D system, respectively. No difference was noted in the MH basal-diameter(p = 0.128), total surgical-duration(p = 0.299), internal-limiting membrane(ILM) peel time(p = 0.682), and the final visual acuity (VA; p = 0.515) between the two groups. Both groups showed significant improvement in VA(p < 0.001) with a 90% closure rate at one-month post-surgery. Cognitive workload comparison, the intraoperative HR(p = 0.024), total workload score(P = 0.005), and temporal-demand dimension(p = 0.004) were significantly more in Conventional microscope group as compared to 3D group. In both the groups, the HR increased significantly from the baseline while performing ILM peeling and at the end.ConclusionThe surgeon’s cognitive workload is markedly reduced while performing macular hole surgery with a 3D viewing system. Moreover, duration of surgery including ILM peel time, MH closure rates, and visual outcomes remains unaffected irrespective of the operating microscope system.

PARS PLANA VITRECTOMY WITH OR WITHOUT INTERNAL LIMITING MEMBRANE PEEL FOR MACULAR HOLE: A Systematic Review and Meta-Analysis.

To compare the efficacy and safety of pars plana vitrectomy with and without internal limiting membrane (ILM) peeling for macular hole (MH). A systematic literature search on Ovid MEDLINE, Embase, Cochrane Library, and Google Scholar was performed from January 2000 to 2023. The primary outcome was the final best-corrected visual acuity (BCVA). Secondary outcomes included MH closure rates and the need for repeat surgery. The authors performed a random-effects meta-analysis on Review Manager 5.4. Fourteen studies on 880 eyes were included. Pars plana vitrectomy with and without ILM peel achieved a similar final BCVA ( P = 0.66). However, pars plana vitrectomy without ILM peeling achieved a significantly better final BCVA in eyes with closed MHs (WMD = 0.05 logMAR, 95% CI, 0.01-0.10, P = 0.02). Pars plana vitrectomy with ILM peeling achieved a significantly higher primary MH closure rate (RR = 1.21, 95% CI, 1.04-1.42, P = 0.02) and lower incidence of MH reoperation (RR = 0.19, 95% CI, 0.11-0.33, P < 0.001). The final MH closure rate ( P = 0.12) and incidence of MH recurrence ( P = 0.25) were similar between groups. Pars plana vitrectomy with and without ILM peel achieved a similar final BCVA. However, pars plana vitrectomy without ILM peeling achieved a better final BCVA in eyes with closed MHs. ILM peeling achieved a greater primary MH closure rate and reduced need for reoperation.