Clinical characteristics and prognostic factors for visual outcome in 669 patients with intraocular foreign bodies

Clinical Characteristics and Prognostic Factors of Patients with Intraocular Foreign Bodies from a Tertiary Eye Center in North China

Background

This study aims to describe the epidemiology and clinical features of patients with intraocular foreign bodies (IOFBs) and analyze the prognostic factors influencing final vision.

Methods

We retrospectively reviewed medical records of patients with IOFBs admitted to Qingdao Eye Hospital of Shandong First Medical University between January 1, 2014, and December 31, 2021. Inclusion criteria involved complete clinical data details of patients diagnosed with intraocular foreign bodies in our hospital who were treated with concurrent surgery and based on IOFB position and characteristics, different surgical methods were employed. The minimum follow-up duration was 6 months. Exclusion criteria were foreign bodies retained in the orbit, organ failure, surgical contraindications, coagulation abnormalities, autoimmune diseases, history of ocular surgery, and ocular space-occupying lesions. Based on IOFB position and characteristics, different surgical methods were employed. Multivariate logistic regression analysis was performed to predict independent factors influencing final visual acuity after IOFBs.

Results

This study analyzed 159 patients (159 eyes) with IOFBs. Based on discharge and follow-up results, IOFB removal was performed through pars plana incision in 105 (67.9%) eyes, corneoscleral limbus incision in 24 (15.1%) eyes, and original wound in 27 (17.0%) eyes. Of these, 44 eyes underwent IOFB removal without vitrectomy, while 55 (34.6%) eyes were treated with silicone oil. Post-vitrectomy, three cases showed secondary macular membrane, five cases exhibited retinal detachment, and enucleation was necessary in three cases. The final best corrected visual acuity (BCVA, logMAR) was 1.06 ±0.88, significantly better than preoperative visual acuity of 1.65 ±0.87 (t = 8.21, p < 0.01). Multi-factor logistic regression analysis revealed that the length of corneal/scleral wound (OR=0.6 P < 0.05), maximum size of IOFB (OR=0.585 P < 0.05), initial presenting VA (OR=0.900 P < 0.05), and macular lesions(OR=0.400 P < 0.05) were risk factors for postoperative vision prognosis after intraocular foreign body surgery.

Conclusion

In a tertiary eye center in northern China, IOFBs predominantly affected the working-age group, particularly males. Factors such as wound length, IOFB size, initial presenting VA, and macular lesions might impact the final visual outcome.

[Functional outcomes and prognostic factors of firearm-related ocular trauma among soldiers in the conflict zones of Cameroon]

PURPOSE

To study prognostic factors and functional visual outcomes of soldiers after firearm-related ocular trauma in the conflict zone.

MATERIALS AND METHODS

A cross-sectional analytical study was carried out from January 2017 to December 2022 in the ophthalmology departments of three military hospitals. Soldiers with firearm-related ocular trauma were selected. Epidemiological and clinical data, prognostic factors and functional outcomes were studied. Statistical analyses were performed using IBM-SPSS version 23.0 software. Univariate and multivariate analyses were performed, and a P-value<0.05 was considered statistically significant.

RESULTS

A total of 162 eyes of 136 patients were included. The mean age was 28.93±6.52 years. All patients were male. Improvised firearms were the most frequent cause (77%). Bilateral involvement was observed in 26 patients (19.1%). The mean visual acuity of the affected eyes was 1.66±1.04logMAR on admission. Closed globe injuries predominated (72%). The most frequent anatomical lesions of the globe were hyphema (23.4%) and vitreous hemorrhage (19.7%). The mean final visual acuity was 1.38±1.17logMAR, and blindness was observed in 50% of eyes. Factors influencing final visual acuity were type of trauma, initial visual acuity, hyphema and vitreous hemorrhage.

CONCLUSION

Blindness due to firearm-related eye injuries in the conflict zone of Cameroon is common. Wearing protective glasses or visors might reduce its frequency.

Early versus Delayed Timing of Primary Repair after Open-Globe Injury: A Systematic Review and Meta-analysis

TOPIC

The timing of primary repair of open-globe injury is variable in major trauma centers worldwide, and consensus on optimal timing is lacking.

CLINICAL RELEVANCE

Surgery is the mainstay of open-globe injury management, and appropriate timing of surgical repair may minimize the risk of potentially blinding complications such as endophthalmitis, thereby optimizing visual outcomes.

METHODS

A systematic literature review was performed following Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines (International Prospective Register of Systematic Reviews identifier, CRD42023442972). The Cochrane Central Register of Controlled Trials, MEDLINE, Embase, and ISRCTN registries and ClinicalTrials.gov were searched from inception through October 29, 2023. Prospective and retrospective nonrandomized studies of patients with open-globe injury with a minimum of 1 month of follow-up after primary repair were included. Primary outcomes included visual acuity at last follow-up and the proportion of patients with endophthalmitis. Certainty of the evidence was assessed using the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) approach.

RESULTS

Fifteen studies met inclusion criteria, reporting a total of 8497 eyes. The most common injury types were penetrating and intraocular foreign body (IOFB). Meta-analysis found that primary repair less than 24 hours after open-globe injury was associated with 0.30 odds of endophthalmitis compared with primary repair conducted more than 24 hours after trauma (odds ratio, 0.39; 95% confidence interval [CI], 0.19-0.79; I2 = 95%; P = 0.01). No significant difference was found in reported visual outcomes between patients whose open-globe injuries were repaired more than, compared with less than, 24 hours after trauma (odds ratio, 0.89; 95% CI, 0.61-1.29; I2 = 70%; P = 0.52). All included studies were retrospective and nonrandomized, demonstrating an overall low certainty of evidence on GRADE assessment.

DISCUSSION

Only retrospective data exist around the effect of timing of open-globe repair, resulting in low certainty of the available evidence. However, this review of current evidence, predominantly including penetrating and IOFB injuries, suggests that primary repair performed less than 24 hours after open-globe injury is associated with a reduced endophthalmitis rate compared with longer delays, consistent with delay to primary repair increasing endophthalmitis risk.

FINANCIAL DISCLOSURE(S)

Proprietary or commercial disclosure may be found in the Footnotes and Disclosures at the end of this article.

Clinical and imaging characteristics, outcomes and prognostic factors of intraocular foreign bodies extracted by vitrectomy

To investigate the clinical and computer tomography (CT) features and visual prognostic factors of pars plana vitrectomy (PPV) for management of retained posterior segment intraocular foreign body (IOFB). Medical records of 96 patients with IOFB removed by PPV between July 2017 and June 2021 were retrieved. The medical records, including demographic data, initial and final best corrected visual acuity (BCVA) using standard Snellen chart, characteristics of IOFB, CT findings, and surgical details, were reviewed. Outcome was evaluated according to the final BCVA and prognostic factors were obtained. The mean age was 42.31 ± 12.05 years (range 13-71 years) with 94 males (97.9%) and two females (2.1%). CT was sensitive of IOFB in 93.75% (90 eyes) and the locations were consistent with that found during PPV: 20 foreign bodies were located in vitreous, 6 near ciliary body, and 70 on or in retina. Mean diameter of IOFB removed by PPV is 3.52 mm ± 3.01 mm (range 1-22; median 3), and mean area is 6.29 ± 6.48 mm2 (range 0.5-40; median 3), which was statistically associated with the initial VA < 0.1 and endophthalmitis. Endophthalmitis was found in 24 (25.0%) eyes and large wound together with scleral entry site might be related to the endophthalmitis. Visual outcome < 0.1 was associated with relative afferent pupillary defect, initial VA < 0.1, and presence of endophthalmitis. Initial VA ≥ 0.1 was independent predictive factor for a better final BCVA. Relative afferent pupillary defect, initial BCVA < 0.1, and presence of endophthalmitis are poor visual prognostic factors.

NOVEL TECHNIQUE FOR INTRAOCULAR FOREIGN BODY REMOVAL: Magnetized Disposable Microforceps. A Systematic Approach and First Clinical Result

PURPOSE

To verify whether disposable microforceps can be magnetized to atraumatically attract and then grasp intraocular foreign bodies. An effective magnetization protocol was developed. The clinical relevance was tested, and a first practical application was performed.

METHODS

The magnetic flux density (MFD) of a bar magnet and an electromagnet was measured. Steel screws were used to determine the magnetization protocol. Disposable microforceps was magnetized, MFD generated at the tip was measured, and the weight that can be lifted was tested. Foreign body removal with such forceps was performed.

RESULTS

The electromagnet MFD was much higher than the bar magnet. The most effective magnetization protocol was to pass the screw from the end along the shaft and back over the electromagnet. Magnetized microforceps had a 7.12 mT change in MFD at the tip. Steel balls up to 87 mg could be lifted in buffered saline solution. In clinical use, the intraocular foreign body could be attracted and grasped safely.

CONCLUSION

Disposable microforceps can be easily and inexpensively magnetized. The achievable MFD is clinically relevant to attract typical intraocular foreign bodies. An electromagnet is best suited for this purpose. With such prepared forceps, foreign bodies can be attracted atraumatically and grasped securely.

Outcomes and Prognostic Factors Following Pars Plana Vitrectomy for Intraocular Foreign Bodies-11-Year Retrospective Analysis in a Tertiary Care Center

Aim: To evaluate the visual outcome of penetrating ocular injuries with a retained intraocular foreign body (IOFB) managed by pars plana vitrectomy (PPV) and to describe the risk factors associated with poor visual acuity and retinal detachment (RD) development. Methods: Medical records of 56 patients with IOFB that were removed by PPV over a period of 11 years (1 January 2010−31 December 2020) were reviewed. We extracted the demographic data, initial and final best corrected visual acuity (BCVA) using standard Snellen chart, IOFB characteristics, complications and surgical details. Outcome was evaluated according to the final BCVA: poor <0.1, good 0.1−<0.5 or excellent ≥0.5. Results: The mean age was 36.1 ± 14.1 (range, 16−71) years and the majority of patients were males (55 out of 56, 98.2%). IOFB was retinal in 27 (48.2%) cases and intravitreal in 29 cases (51.8%). IOFB size was ≤3mm in 26 (46.4%) cases and >3mm in 30 (53.6%) cases. Preoperative RD was identified in 12 (21.4%) cases and endophthalmitis in 17 cases (30.4%). IOFBs larger than 3 mm and retinal location were associated with RD development. Poor visual outcome was associated with initial BCVA, retinal location, RD and endophthalmitis. Conclusion: Initial BCVA, retinal foreign body, RD and endophthalmitis were risk factors for poor visual outcome.