Objective: To analyze the effect of pars plana vitrectormy (PPV) on visual acuity of posterior intraocular foreign body. Methods: Retrospective analysis was made in 40 cases of posterior segment intraocular foreign bodies (40 eyes

all in posterior segment intraocular foreign bodies by 23G minimally invasive PPV) admitted to the Department of Ophthalmology

The First Affiliated Hospital of Chongqing Medical University from December 2015 to January 2017. We studied such following factors as age

gender

preoperative/postoperative best corrected visual acuity (BCVA)

posterior segment foreign material properties

size

intraocular foreign body removal time

position of intraocular foreign bodies

intraocular foreign bodies left position

operation time

operation method and complications in the statistics. Results: The 40 foreign bodies were all taken out

and the probability was 100%. The average BCVA after operation was significantly better than that before the operation (t=4.295

P=0.000). The main influencing factors for the vision of patients were retinal detachment (P=0.000)

the retina injury (P=0.001)

the size of the intraocular foreign bodies (P=0.023)

the time of removing the foreign bodies (P=0.006)

hyphema (P=0.032)

and vitreous hemorrhage (P=0.025). Conclusion: Greater intraocular foreign bodies and combination of retinal detachment

retinal hiatus

hyphema

vitreous hemorrhage

the time of removing foreign bodies longer in the open in trauma can cause more serious consequences

and worse prognosis of eyesight. In our study

whether stage Ⅰ suture + intravitreal infusion or direct vitrectomy combined with ocular debridement and suture had no significant impact on the recovery of vision and anatomy. But vitrectomy can better remove intraocular foreign body complicated with intraocular complications

and timely treatment plays an important role in the recovery of visual acuity for patients.