Predictive value of pattern VEP, pattern ERG and hole size in macular hole surgery

Neuroenhancement and neuroprotection by oral solution citicoline in non-arteritic ischemic optic neuropathy as a model of neurodegeneration: A randomized pilot study

PURPOSE

To evaluate whether treatment with Citicoline in oral solution (OS-Citicoline) would increase visual function, retinal ganglion cells (RGCs) function, and neural conduction along visual pathways (neuroenhancement), and/or induce preservation of RGCs fibers' loss (neuroprotection) in non-arteritic ischemic optic neuropathy (NAION), a human model of neurodegeneration.

METHODS

Thirty-six patients with NAION and 20 age-matched controls were enrolled. Nineteen NAION patients received 500 mg/day of OS-Citicoline for a 6-month period followed by 3-month of wash-out (NC Group); 17 NAION patients were not treated (NN Group) from baseline to 9 months. In all subjects at baseline, and in NC and NN eyes at 6 and 9 months of follow-up, we assessed Visual Acuity (VA), Pattern Electroretinogram (PERG), Visual Evoked Potentials (VEP), retinal nerve fiber layer thickness (RNFL-T), and Humphrey 24-2 visual field mean deviation (HFA MD). Mean differences were statistically evaluated with ANOVA between Groups, and linear correlations were analysed with Pearson's test.

RESULTS

At 6 months, significant differences between groups for all parameters were observed (ANOVA, p<0.01). In NC eyes, VA increased, PERG responses increased, VEP recordings improved and were significantly correlated with increases in HFA MD (p<0.01), and RNFL-T was unmodified or improved. In contrast, in NN eyes, VA, PERG, VEP responses, RNFL-T, and HFA MD were further worsened. Significant differences were still present at 9-month follow-up in the NN Group and after 3 months of OS-Citicoline wash-out in NC eyes.

CONCLUSIONS

OS-Citicoline treatment induced neuroenhancement (improvement in RGCs function and neural conduction along visual pathways related to improvement of visual field defects) and neuroprotection (unmodified or improved RNFL morphological condition) in a human model of NAION involving fast RGCs degeneration.

TRIAL REGISTRATION

ClinicalTrials.gov NCT03758118.

Predicting visual outcome following surgery for idiopathic macular holes

Since Kelly and Wendel [Arch Ophthalmol 1991;109:654-659] first reported successfully treating macular holes (MHs) using pars plana vitrectomy in 1991, MH surgery has been constantly improved. For example, introducing the removal of the internal limiting membrane considerably increased the closure rate of MHs, and the advent of microincision vitrectomy surgery reduced surgical trauma and decreased patient discomfort after surgery. As modern MH surgery can achieve a higher anatomical success rate and alleviate patients' postoperative distress, postoperative visual outcomes have lately become the primary concern. Informing patients of the expected visual acuity and visual improvement before surgery is ideal, but predicting postoperative visual outcomes is difficult because a large number of factors are associated with them. In this paper, we review previous studies and provide accumulating evidence for the relationship between individual prognostic factors and visual outcomes after MH surgery.

Clinical applications of optical coherence tomography in the posterior pole: the 2011 José Manuel Espino Lecture - Part I

Optical coherence tomography (OCT) is now a standard of care in ophthalmology and is considered essential for the diagnosis and monitoring of many retinal diseases. One of the major advances obtained with OCT was the understanding of the pathophysiology of macular holes. Non-full-thickness macular holes have been revisited because high-resolution OCT images can detect a lamellar macular defect that is not always visible clinically, and surgery has been advocated by some authors. OCT can be valuable in determining the need for and/or timing of surgical intervention on epiretinal membranes or vitreomacular traction syndrome. In addition, we can use this technology as a predictive factor in the prognosis and follow-up of the most common posterior pole pathologies.

Is It Worth Reoperating on Macular Holes?

OBJECTIVE

To evaluate the visual outcome after a second surgical attempt to close idiopathic full-thickness macular holes (FTMH) in patients who underwent unsuccessful primary surgery and in patients with reopened FTMHs.

DESIGN

Retrospective single-center case series.

PARTICIPANTS

Five hundred thirty-two patients underwent surgery for FTMH in St. Paul's Eye Unit, Liverpool, United Kingdom, between March, 1995, and March, 2005. Fifty-one patients had unclosed FTMHs (unclosed group) and 21 patients had reopened FTMHs after initially successful surgery (reopened group).

METHODS

All patients underwent a second pars plana vitrectomy. Autologous platelet concentrate and perfluoropropane endotamponade were used. Internal limiting membrane peeling was carried out in selected cases. Patients were instructed to maintain a face-down position for 2 weeks after the surgery.

MAIN OUTCOME MEASURES

Anatomic and visual results.

RESULTS

All patients in the reopened group and 76% of patients in the unclosed group achieved successfully closure of the FTMH after the second surgery. Mean decimal Snellen visual acuity (VA; +/-standard deviation [SD]) before the second surgery was 0.14+/-0.10 (range, 0.01-0.33) in the reopened group and 0.10+/-0.07 (range, hand movements [HM]-0.33) in the unclosed group. The best VA was achieved after cataract surgery; the mean best VA (+/-SD) in the reopened group was 0.42+/-0.31 (range, 0.05-1) and in the unclosed group was 0.19+/-0.14 (range, HM-0.66).

CONCLUSIONS

Reoperating on reopened FTMH resulted in 100% anatomic closure and significant improvement in vision. In contrast, reoperating on patients with initially unsuccessful surgery resulted a lower anatomic closure rate and relatively poor final vision even if their macular holes were closed successfully. This information may help surgeons and patients decide whether to undertake a second operation.

Evaluation of successful macular hole surgery by optical coherence tomography and multifocal electroretinography

PURPOSE

To evaluate successful macular hole surgery using optical coherence tomography (OCT) and multifocal electroretinography (MFERG).

DESIGN

Interventional case series.

METHODS

In a prospective study, 20 eyes of 20 patients with successful surgery for stage II, III, or IV idiopathic macular hole were evaluated by best-corrected visual acuity (BCVA), ocular examination, OCT, and MFERG preoperatively and 1, 3, 6, and 12 months postoperatively. For statistical analysis, the paired t test and nonparametric methods were used, as well as the Spearman analysis.

RESULTS

Postoperatively, all 20 eyes of 20 patients had anatomic closure of the macular hole confirmed by OCT. The center of the fovea, measured by OCT from the retinal pigment epithelium to the inner retinal surface, had a mean +/- SD thickness of 116.5 +/- 30.9 microm (range, 68-175 microm) 1 year postoperatively. Best-corrected visual acuity significantly improved (preoperative mean +/- standard deviation [SD] value, 0.131 +/- 0.081 and 1 year postoperative mean +/- SD value, 0.407 +/- 0.193). Multifocal electroretinography values area 1 (0-2.8 degrees) and area 2 (2.8-9 degrees from the center of the fovea) significantly improved (preoperative mean +/- SD values 3.10 +/- 1.334 nV/deg(2) and 3.573 +/- 1.545 nV/deg(2), respectively, and 1 year postoperative +/- SD mean values, 5.53 +/- 1.208 nV/deg(2) and 4.748 +/- 1.404 nV/deg(2), respectively). The thickness of the fovea, measured by OCT, significantly correlated with the BCVA 1 year postoperatively. One year postoperative MFERG values areas 1 and 2 were not correlated with 12-month BCVA and OCT findings.

CONCLUSIONS

Twelve months postoperatively BCVA and MFERG values significantly improved in this series of eyes with successful macular hole surgery. Optical coherence tomography findings were correlated to BCVA, but MFERG values were not correlated to BCVA and OCT findings, 1 year postoperatively.