BACKGROUND: Macular hole (MH) can severely impair central vision. Although it can be treated with vitrectomy surgery, avoiding recurrence and improving visual acuity are still priorities to be addressed. This study aims to reveal the trends and hotspots about MH.
METHODS: The Web of Science Core Collection (WOSCC) was used to perform a bibliometric analysis investigating trends of MH research from 2002 to 2021. We evaluated the details of associated regions, institutions, authors, and journals. To construct and overlay network visualizations, VOSviewer software was used.
RESULTS: In total, 1518 publications were collected. Our analysis showed that MH research is becoming increasingly relevant, with Japan achieving the largest number of publications (291), largest number of citations (7745 in total), and highest h-index value (48). Retina published the most publications on this topic, totaling more than the next two journals combined. An analysis of keyword co-occurrence was evaluated, highlighting several novel keywords of interest, such as flap technique, transplantation, epiretinal proliferation (EP), foveal microstructure, and retinal sensitivity.
CONCLUSIONS: Details on MH research were uncovered by comprehensively analyzing the global trends and hotspots over the past two decades, presenting valuable information for future MH research. Japan, the USA, and China hold leading positions in research on this topic. Amendable surgical methods are a potential focus for improving prognosis.

UNASSIGNED: To analyze the clinical features of pediatric open globe injury (OGI) in left-behind children (LBC) and in non-left-behind children (non-LBC) prospectively.
UNASSIGNED: Patients diagnosed with OGI were included and divided into 2 groups: LBC and non-LBC. A complete ophthalmological examination was performed. Primary wound repair was completed within 8 hours from initial administration. Pars plana vitrectomy (PPV) was subsequently performed for retained intraocular foreign body (IOFB), endophthalmitis, retinal detachment, or non-clearing vitreous hemorrhage.
UNASSIGNED: A total of 96 patients (4 to 15 years old) were recruited, including 54 LBC and 42 non-LBC. Rupture of the eyeball (P<0.001), endophthalmitis (P<0.001), primary hospitalization time (PHT) over 24 hours (PHT >24 h) (P=0.016), traumatic cataract (P=0.013), vitreous hemorrhage (P=0.040), numbers of surgeries (P<0.001), and lower OTS scores and grades (P<0.001) predisposed patients to poorer final visual acuity (VA). Compared with non-LBC, LBC were significantly younger (P<0.001), had lower OTS scores (P=0.020), had longer PHT (P<0.001), and worse baseline (P=0.011) and final VA (P<0.001). The 3 most common injury sources were pencils (20 cases, 20.8%), knives (11 cases, 11.5%), and iron wire (7 cases, 7.3%). Pencils were the major injury source for IOFB (14 cases, 53.8%). LBC were significantly more likely to be injured by instruments which should be routinely kept away from children (P=0.009).
UNASSIGNED: The prognosis of pediatric OGI was worse in LBC than in non-LBC. It is necessary to improve the guardianship of LBC. Many tragedies may be avoided if adult instruments are properly stored and if children are educated to properly use writing devices.

OBJECTIVE: To compare structural and functional improvements in patients with vitreous haemorrhage (VH) with different IOPs re-established at the end of pars plana vitrectomy (PPV).
METHODS: It is a prospective, randomized, comparative, interventional study. Ninety-five patients with nonclearing VH were randomized to receive PPV with normalized IOPs of 15 mmHg (Group I: 32 eyes), 25 mmHg (Group II: 32 eyes) and 35 mmHg (Group III: 31 eyes) at the end of surgery. The grade of vitreous opacity and best-corrected visual acuity (BCVA) on postoperative day 1, week 1, month 1 and month 3 were compared with a mixed model for repeated measures analysis.
RESULTS: All 3 groups achieved significant improvement on postoperatively in BCVA (p < 0.01) and vitreous opacity (p < 0.01) compared with the baseline. The group difference was significant at the end of week 1 and showed a trend of higher IOP set at the end of PPV with better anatomical (p < 0.01) and visual recovery (p < 0.01). However, at postoperative month 1 and month 3, equivalent anatomical (month 1: p = 0.56; month 3: p = 0.36) and visual outcomes (month 1: p = 0.16; month 3: p = 0.88) were obtained in the 3 groups. The average effect of IOP on BCVA (group II versus group III: effect size (ES): 0.41, p < 0.01; group I versus group III: ES: 0.66, p < 0.01) and vitreous opacity (group II versus group III: ES: 0.70, p < 0.01; group I versus group III: ES:1.09, p < 0.01) over the course of the study period was statistically significant. The only postoperative complication was recurrent VH in two patients allocating in group I and II, respectively.
CONCLUSIONS: A relatively higher IOP set at the end of vitrectomy resulted in a more stable and rapid recovery with fewer complications in patients with non-complex VH.

BACKGROUND: While pars plana vitrectomy (PPV) has become the third most commonly performed surgery in the world, it can also induce multiple post complications easily. Among them, cataract progression is the most frequent one that can lead to blindness eventually.
METHODS: To understand the underlying mechanisms of post PPV cataract progression, we performed comprehensive metabolic characterization of aqueous humor (AH) samples from 20 cataract patients (10 post PPV complication and 10 none PPV cataract) by a non-targeted metabolomic analysis using gas chromatography combined with time-of-flight mass spectrometer (GC/TOF MS).
RESULTS: A total of 263 metabolites were identified and eight of them are determined to be significantly different (VIP ≥ 1 and p ≤ 0.05) between post PPV group and none PPV control group. The significantly changed metabolites included glutaric acid and pelargonic acid that play key roles in the regulation of oxidative stress and inflammatory responses. Furthermore, we constructed a metabolic regulatory network in each group based on metabolite-metabolite correlations, which reveals key metabolic pathways and regulatory elements including amino acids and lipids metabolisms that are related to cataract progression.
CONCLUSIONS: Altogether, this work discovered some potential metabolite biomarkers for post PPV cataract diagnostics, as well as casted some novel insights into the underlying mechanisms of cataract progression after PPV.