Minimally invasive vitrectomy combined with magnetic foreign body remover for the removal of magnetic foreign bodies_Chinese Journal of Ocular Fundus Diseases

Authors：

Zhao Xuhua ¹ , Li Lin ¹ , Zhu Xinyue ¹ , Liang Chunyu ¹ , Shi Leite ² , Du Liping ¹ ,  Jin Xuemin ¹

1. Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450003, China;
2. Department of Medical Information, The First Affliated Hospital of Zhengzhou University, Zhengzhou 450003, China;

Corresponding?author：

Jin Xuemin, Email: 2740913223@qq.com

Keywords：

Intraocular foreign body; Magnetic foreign body extractor; Ocular trauma; Microincision; Pars plana vitrectomy

DOI：

10.3760/cma.j.cn511434-20250526-00233

Video：

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Objective To observe and preliminarily evaluate the clinical efficacy of a magnetizable intraocular magnetic foreign body extractor combined with pars plana vitrectomy (PPV) for the treatment of posterior segment small-to-medium-sized magnetic intraocular foreign bodies (IOFB). Methods A retrospective clinical study. A total of 12 patients (12 eyes) with consecutive posterior segment magnetic IOFB who underwent PPV combined with IOFB removal at the Department of Ophthalmology of The First Affiliated Hospital of Zhengzhou University, from September 2024 to May 2025, were enrolled. All affected eyes underwent best-corrected visual acuity (BCVA), B-scan ultrasonography and/or CT examination. BCVA was measured using a standard logarithmic visual acuity chart, and the results were converted to logarithm of the minimum angle of resolution (logMAR) visual acuity for statistical analysis. All patients received standard three-port, 23G or 25G PPV via the pars plana. The IOFB were removed using a magnetizable intraocular magnetic foreign body extractor through a corneal wound or limbal incision. The postoperative follow-up period ranged from 3 to 15 months. Preoperative and postoperative BCVA, changes in corneal astigmatism, and intraoperative and postoperative complications were compared. Wilcoxon signed-rank test was used to compare logMAR BCVA and corneal astigmatism before surgery and at the last follow-up. Results Among the 12 patients, 11 patients were male and 1 patient was female. The median age was 40.58 years. The IOFB were located in the vitreous cavity (6 eyes), on the retinal surface (5 eyes), and within the retina (1 eye). All IOFB were magnetic, with a maximum diameter of 5 mm. The IOFB were successfully removed in all affected eyes without the need for excessive intraoperative assistance. The preoperative logMAR BCVA was 1.65 (0.57, 2.30). At the last follow-up, logMAR BCVA and corneal astigmatism were 0.17±0.08 and 0.38 (0.13, 0.94) D, respectively. Compared with preoperative values, BCVA was significantly improved postoperatively (Z=?3.061, P=0.002). Correlation analysis showed no significant correlation between preoperative BCVA and either final BCVA or corneal astigmatism (r=0.183, 0.172; P=0.568, 0.590). No complications related to IOFB removal, such as retinal injury, retinal tear, or vitreous hemorrhage, occurred in any of the affected eyes. Conclusion PPV combined with a magnetizable intraocular magnetic foreign body extractor can safely and effectively remove posterior segment small-to-medium-sized magnetic foreign bodies, reduce complications, and improve postoperative visual acuity.

Citation： Zhao Xuhua, Li Lin, Zhu Xinyue, Liang Chunyu, Shi Leite, Du Liping, Jin Xuemin. Minimally invasive vitrectomy combined with magnetic foreign body remover for the removal of magnetic foreign bodies. Chinese Journal of Ocular Fundus Diseases, 2026, 42(6): 507-511. doi: 10.3760/cma.j.cn511434-20250526-00233 Copy

1.	Nicoar? SD, Irimescu I, C?linici T, et al. Intraocular foreign bodies extracted by pars plana vitrectomy: clinical characteristics, management, outcomes and prognostic factors[J/OL]. BMC Ophthalmol, 2015, 15: 151[2015-11-02]. https://pubmed.ncbi.nlm.nih.gov/26526732/. DOI: 10.1186/s12886-015-0128-6.
2.	Yeh S, Colyer MH, Weichel ED. Current trends in the management of intraocular foreign bodies[J]. Curr Opin Ophthalmol, 2008, 19(3): 225-233. DOI: 10.1097/ICU.0b013e3282fa75f1.
3.	Patel SN, Langer PD, Zarbin MA, et al. Diagnostic value of clinical examination and radiographic imaging in identification of intraocular foreign bodies in open globe injury[J]. Eur J Ophthalmol, 2012, 22(2): 259-268. DOI: 10.5301/EJO.2011.8347.
4.	Liu CC, Tong JM, Li PS, et al. Epidemiology and clinical outcome of intraocular foreign bodies in Hong Kong: a 13-year review[J]. Int Ophthalmol, 2017, 37(1): 55-61. DOI: 10.1007/s10792-016-0225-4.
5.	Zhang Y, Zhang M, Jiang C, et al. Intraocular foreign bodies in china: clinical characteristics, prognostic factors, and visual outcomes in 1, 421 eyes[J]. Am J Ophthalmol, 2011, 152(1): 66-73. DOI: 10.1016/j.ajo.2011.01.014.
6.	Jung HC, Lee SY, Yoon CK, et al. Intraocular foreign body: diagnostic protocols and treatment strategies in ocular trauma patients[J/OL]. J Clin Med, 2021, 10(9): 1861[2021-04-25]. https://pubmed.ncbi.nlm.nih.gov/33923011/. DOI: 10.3390/jcm10091861.
7.	Loporchio D, Mukkamala L, Gorukanti K, et al. Intraocular foreign bodies: a review[J]. Surv Ophthalmol, 2016, 61(5): 582-596. DOI: 10.1016/j.survophthal.2016.03.005.
8.	Imrie FR, Cox A, Foot B, et al. Surveillance of intraocular foreign bodies in the UK[J]. Eye (Lond), 2008, 22(9): 1141-1147. DOI: 10.1038/sj.eye.6702868.
9.	Chang T, Zhang Y, Liu L, et al. Epidemiology, clinical characteristics, and visual outcomes of patients with intraocular foreign bodies in Southwest China: a 10-year review[J]. Ophthalmic Res, 2021, 64(3): 494-502. DOI: 10.1159/000513043.
10.	Nicoar? SD, Irimescu I, C?linici T, et al. Outcome and prognostic factors for traumatic endophthalmitis over a 5-year period[J/OL]. J Ophthalmol, 2014, 2014: 747015[2014-09-15]. https://pubmed.ncbi.nlm.nih.gov/25302113/. DOI: 10.1155/2014/747015.
11.	Gao YZ, Zhang YF, Zhang M, et al. Clinical characteristics and prognostic factors for visual outcome in 669 patients with intraocular foreign bodies[J]. Int J Ophthalmol, 2021, 14(5): 759-765. DOI: 10.18240/ijo.2021.05.18.
12.	Choovuthayakorn J, Hansapinyo L, Ittipunkul N, et al. Predictive factors and outcomes of posterior segment intraocular foreign bodies[J]. Eye (Lond), 2011, 25(12): 1622-1626. DOI: 10.1038/eye.2011.229.
13.	Cherry PM. Standardized classification of ocular trauma[J]. Ophthalmology, 1997, 104(3): 344-345. DOI: 10.1007/BF00190717.
14.	Kiss S, Vavvas D. 25-gauge transconjunctival sutureless pars plana vitrectomy for the removal of retained lens fragments and intraocular foreign bodies[J]. Retina, 2008, 28(9): 1346-1351. DOI: 10.1097/IAE.0b013e318180ab7a.
15.	Liu Y, Wang S, Li Y, et al. Intraocular foreign bodies: clinical characteristics and prognostic factors influencing visual outcome and globe survival in 373 eyes[J/OL]. J Ophthalmol, 2019, 2019: 5208092[2019-02-13]. https://pubmed.ncbi.nlm.nih.gov/30895158/. DOI: 10.1155/2019/5208092.
16.	Szijártó Z, Gaál V, Kovács B, et al. Prognosis of penetrating eye injuries with posterior segment intraocular foreign body[J]. Graefe's Arch Clin Exp Ophthalmol, 2008, 246(1): 161-165. DOI: 10.1007/s00417-007-0650-1.
17.	Woodcock MG, Scott RA, Huntbach J, et al. Mass and shape as factors in intraocular foreign body injuries[J]. Ophthalmology, 2006, 113(12): 2262-2269. DOI: 10.1016/j.ophtha.2006.06.002.
18.	El-Asrar AM, Al-Amro SA, Khan NM, et al. Visual outcome and prognostic factors after vitrectomy for posterior segment foreign bodies[J]. Eur J Ophthalmol, 2000, 10(4): 304-311. DOI: 10.1177/112067210001000406.
19.	Jonas JB, Knorr HL, Budde WM. Prognostic factors in ocular injuries caused by intraocular or retrobulbar foreign bodies[J]. Ophthalmology, 2000, 107(5): 823-828. DOI: 10.1016/s0161-6420(00)00079-8.
20.	Liu X, Bai Q, Song X. Clinical and imaging characteristics, outcomes and prognostic factors of intraocular foreign bodies extracted by vitrectomy[J/OL]. Sci Rep, 2023, 13(1): 14136[2023-08-29]. https://pubmed.ncbi.nlm.nih.gov/37644096/. DOI: 10.1097/00006982-200007000-00007.
21.	Chow DR, Garretson BR, Kuczynski B, et al. External versus internal approach to the removal of metallic intraocular foreign bodies[J]. Retina, 2000, 20(4): 364-369. DOI: 10.1097/00006982-200007000-00007.
22.	Soliman W, Tawfik MA, Abdelazeem K, et al. "Iris shelf" technique for management of posterior segment intraocular foreign bodies[J]. Retina, 2021, 41(10): 2041-2047. DOI: 10.1097/IAE.0000000000003154.

1. Nicoar? SD, Irimescu I, C?linici T, et al. Intraocular foreign bodies extracted by pars plana vitrectomy: clinical characteristics, management, outcomes and prognostic factors[J/OL]. BMC Ophthalmol, 2015, 15: 151[2015-11-02]. https://pubmed.ncbi.nlm.nih.gov/26526732/. DOI: 10.1186/s12886-015-0128-6.
2. Yeh S, Colyer MH, Weichel ED. Current trends in the management of intraocular foreign bodies[J]. Curr Opin Ophthalmol, 2008, 19(3): 225-233. DOI: 10.1097/ICU.0b013e3282fa75f1.
3. Patel SN, Langer PD, Zarbin MA, et al. Diagnostic value of clinical examination and radiographic imaging in identification of intraocular foreign bodies in open globe injury[J]. Eur J Ophthalmol, 2012, 22(2): 259-268. DOI: 10.5301/EJO.2011.8347.
4. Liu CC, Tong JM, Li PS, et al. Epidemiology and clinical outcome of intraocular foreign bodies in Hong Kong: a 13-year review[J]. Int Ophthalmol, 2017, 37(1): 55-61. DOI: 10.1007/s10792-016-0225-4.
5. Zhang Y, Zhang M, Jiang C, et al. Intraocular foreign bodies in china: clinical characteristics, prognostic factors, and visual outcomes in 1, 421 eyes[J]. Am J Ophthalmol, 2011, 152(1): 66-73. DOI: 10.1016/j.ajo.2011.01.014.
6. Jung HC, Lee SY, Yoon CK, et al. Intraocular foreign body: diagnostic protocols and treatment strategies in ocular trauma patients[J/OL]. J Clin Med, 2021, 10(9): 1861[2021-04-25]. https://pubmed.ncbi.nlm.nih.gov/33923011/. DOI: 10.3390/jcm10091861.
7. Loporchio D, Mukkamala L, Gorukanti K, et al. Intraocular foreign bodies: a review[J]. Surv Ophthalmol, 2016, 61(5): 582-596. DOI: 10.1016/j.survophthal.2016.03.005.
8. Imrie FR, Cox A, Foot B, et al. Surveillance of intraocular foreign bodies in the UK[J]. Eye (Lond), 2008, 22(9): 1141-1147. DOI: 10.1038/sj.eye.6702868.
9. Chang T, Zhang Y, Liu L, et al. Epidemiology, clinical characteristics, and visual outcomes of patients with intraocular foreign bodies in Southwest China: a 10-year review[J]. Ophthalmic Res, 2021, 64(3): 494-502. DOI: 10.1159/000513043.
10. Nicoar? SD, Irimescu I, C?linici T, et al. Outcome and prognostic factors for traumatic endophthalmitis over a 5-year period[J/OL]. J Ophthalmol, 2014, 2014: 747015[2014-09-15]. https://pubmed.ncbi.nlm.nih.gov/25302113/. DOI: 10.1155/2014/747015.
11. Gao YZ, Zhang YF, Zhang M, et al. Clinical characteristics and prognostic factors for visual outcome in 669 patients with intraocular foreign bodies[J]. Int J Ophthalmol, 2021, 14(5): 759-765. DOI: 10.18240/ijo.2021.05.18.
12. Choovuthayakorn J, Hansapinyo L, Ittipunkul N, et al. Predictive factors and outcomes of posterior segment intraocular foreign bodies[J]. Eye (Lond), 2011, 25(12): 1622-1626. DOI: 10.1038/eye.2011.229.
13. Cherry PM. Standardized classification of ocular trauma[J]. Ophthalmology, 1997, 104(3): 344-345. DOI: 10.1007/BF00190717.
14. Kiss S, Vavvas D. 25-gauge transconjunctival sutureless pars plana vitrectomy for the removal of retained lens fragments and intraocular foreign bodies[J]. Retina, 2008, 28(9): 1346-1351. DOI: 10.1097/IAE.0b013e318180ab7a.
15. Liu Y, Wang S, Li Y, et al. Intraocular foreign bodies: clinical characteristics and prognostic factors influencing visual outcome and globe survival in 373 eyes[J/OL]. J Ophthalmol, 2019, 2019: 5208092[2019-02-13]. https://pubmed.ncbi.nlm.nih.gov/30895158/. DOI: 10.1155/2019/5208092.
16. Szijártó Z, Gaál V, Kovács B, et al. Prognosis of penetrating eye injuries with posterior segment intraocular foreign body[J]. Graefe's Arch Clin Exp Ophthalmol, 2008, 246(1): 161-165. DOI: 10.1007/s00417-007-0650-1.
17. Woodcock MG, Scott RA, Huntbach J, et al. Mass and shape as factors in intraocular foreign body injuries[J]. Ophthalmology, 2006, 113(12): 2262-2269. DOI: 10.1016/j.ophtha.2006.06.002.
18. El-Asrar AM, Al-Amro SA, Khan NM, et al. Visual outcome and prognostic factors after vitrectomy for posterior segment foreign bodies[J]. Eur J Ophthalmol, 2000, 10(4): 304-311. DOI: 10.1177/112067210001000406.
19. Jonas JB, Knorr HL, Budde WM. Prognostic factors in ocular injuries caused by intraocular or retrobulbar foreign bodies[J]. Ophthalmology, 2000, 107(5): 823-828. DOI: 10.1016/s0161-6420(00)00079-8.
20. Liu X, Bai Q, Song X. Clinical and imaging characteristics, outcomes and prognostic factors of intraocular foreign bodies extracted by vitrectomy[J/OL]. Sci Rep, 2023, 13(1): 14136[2023-08-29]. https://pubmed.ncbi.nlm.nih.gov/37644096/. DOI: 10.1097/00006982-200007000-00007.
21. Chow DR, Garretson BR, Kuczynski B, et al. External versus internal approach to the removal of metallic intraocular foreign bodies[J]. Retina, 2000, 20(4): 364-369. DOI: 10.1097/00006982-200007000-00007.
22. Soliman W, Tawfik MA, Abdelazeem K, et al. "Iris shelf" technique for management of posterior segment intraocular foreign bodies[J]. Retina, 2021, 41(10): 2041-2047. DOI: 10.1097/IAE.0000000000003154.

Chinese Journal of Ocular Fundus Diseases

Minimally invasive vitrectomy combined with magnetic foreign body remover for the removal of magnetic foreign bodies

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