scholarly journals Correlation Between Electroretinogram and Visual Prognosis in Metallic Intraocular Foreign Body Injury

2021 ◽  
Vol 8 ◽  
Author(s):  
Xiaoting Mai ◽  
Fangyi Ling ◽  
Yuting Gong ◽  
Jialin Chen ◽  
Hongjie Lin ◽  
...  
Keyword(s):  
Foreign Body ◽  
Visual Outcome ◽  
Oscillatory Potentials ◽  
Intraocular Foreign Body ◽  
Implicit Time ◽  
Maximal Response ◽  
Corrected Visual Acuity ◽  
Maximum Change ◽  
Cone Response ◽  
Fellow Eyes

Purpose: This study aims to investigate the correlation between electroretinogram (ERG) and visual outcome in eyes with metallic intraocular foreign body (IOFB) injury.Methods: Cases with metallic IOFB injuries with preoperative ERG from January 2008 to May 2020 were reviewed retrospectively. Five ERG responses were recorded, including rod response, maximal response, oscillatory potentials, cone response, and 30-Hz flicker. The results were compared between the affected and the contralateral eyes. All patients received surgery to remove IOFBs. The correlation between amplitudes, implicit times, and grades of ERG with final best-corrected visual acuity (BCVA) was analyzed.Results: A total of 33 eyes of 33 patients were included. The eyes with IOFB had generally delayed implicit time and reduced amplitude in all waves. The maximum change was found in oscillatory potentials S3 and N1 (0.42 ± 0.42 and 1.95 ± 1.97 of the fellow eyes, respectively, p < 0.05). All amplitudes were negatively correlated with the final BCVA (rs: −0.676 to −0.459, all p < 0.05). In contrast, all implicit times were positively correlated with final BCVA, although, some of them were not statistically significant (rs: 0.035 to 0.687). Among them, oscillatory potential P3 has the highest correlation coefficient (rs = 0.687, p < 0.001). All grades of ERG waves were statistically correlated with the final BCVA (rs: −0.596 to −0.664, all p < 0.001).Conclusions: ERG can be used to assess visual outcome in metallic IOFB injury after surgery. Oscillatory potentials provided the most significant responses.

scholarly journals Comparison of full-field electroretinogram in diabetic and non diabetic dogs with cataracts

2010 ◽  
Vol 30 (12) ◽  
pp. 1071-1076 ◽  
Author(s):  
Angélica M.V. Safatle ◽  
Ana Paula Hvenegaard ◽  
Denise Otsuki ◽  
Terezinha L. Martins ◽  
Márcia Kahvegian ◽  
...  
Keyword(s):  
Oscillatory Potentials ◽  
Implicit Time ◽  
Maximal Response ◽  
Clinical Electrophysiology ◽  
Full Field ◽  
Lower Amplitude ◽  
Cone Response ◽  
Retinal Disorders ◽  
Diabetic Dogs ◽  
Fundoscopic Examination

Being the commonest ocular disorder, dense cataracts disable fundoscopic examination and the diagnosis of retinal disorders, which dogs may be predisposed. The aim of this study was to compare the electroretinographic responses recorded according to the International Society for Clinical Electrophysiology of Vision human protocol to evaluate retinal function of diabetic and non diabetic dogs, both presenting mature or hypermature cataracts. Full-field electroretinogram was recorded from 66 dogs, with ages varying from 6 to 15 years old allocated into two groups: (1) CG, non diabetic cataractous dogs, and (2) DG, diabetic cataractous dogs. Mean peak-to-peak amplitude (microvolts) and b-wave implicit time (milliseconds) were determined for each of the five standard full-field ERG responses (rod response, maximal response, oscillatory potentials, single-flash cone response and 30 Hz flicker). Comparing CG to DG, ERGs recorded from diabetic dogs presented lower amplitude and prolonged b-wave implicit time in all ERG responses. Prolonged b-wave implicit time was statistically significant (p< 0.05) at 30 Hz flicker (24.0 ms versus 22.4 ms). These data suggests full-field ERG is capable to record sensible alterations, such as flicker's implicit time, being useful to investigate retinal dysfunction in diabetic dogs.

Macular dysfunction in patients with macula-on rhegmatogenous retinal detachments

2018 ◽  
Vol 103 (3) ◽  
pp. 404-409 ◽  
Author(s):  
Kunihiko Akiyama ◽  
Kaoru Fujinami ◽  
Ken Watanabe ◽  
Toru Noda ◽  
Yozo Miyake ◽  
...  
Keyword(s):  
Case Series ◽  
Oscillatory Potentials ◽  
Implicit Time ◽  
Rank Test ◽  
Macular Function ◽  
Giant Retinal Tear ◽  
Significant Difference ◽  
The Status ◽  
Signed Rank Test ◽  
Fellow Eyes

AimsTo assess macular function in patients with macula-on rhegmatogenous retinal detachments (RRDs) using focal macular electroretinography (FMERG).MethodsThis is a prospective, observational case series of 27 patients diagnosed with a macula-on RRD. Foveal attachment was confirmed on spectral-domain optical coherence tomography. Eyes with any macular disorder, cataract, vitreous opacity or vitreous haemorrhage were excluded. FMERG was recorded in the affected and fellow eyes using a round stimulus 15° in diameter. The status of four retinal factors in the affected eyes was examined, that is, the number of involved quadrants, number of quadrants with retinal breaks, presence of an RRD invading the vascular arcade, and presence of a giant retinal tear. The implicit time and amplitude of the a-wave, b-wave and oscillatory potentials (OPs) were compared between the affected and fellow eyes using Wilcoxon signed-rank test. The influence of the four retinal factors on each FMERG component of the affected eyes was also evaluated using Mann-Whitney U test and Kruskal-Wallis test.ResultsSignificant reductions in the amplitudes of the a-waves (p=0.001), b-waves (p<0.001) and OPs (p=0.001) were observed in the affected eyes compared with the fellow eyes. There was no significant difference between the affected and fellow eyes in the implicit times of any components. None of the four retinal factors affected the parameters in the affected eyes.ConclusionAltered FMERG responses suggested the presence of macular dysfunction in eyes with macula-on RRDs.

scholarly journals Management of Posterior Segment Intraocular Foreign Body with Vitrectomy; Visual and Anatomical Outcome

2018 ◽  
Vol 5 (2) ◽  
pp. 45-48
Author(s):  
Ritesh Kumar Shah ◽  
Raghunandan Byanju ◽  
Sangeeta Pradhan
Keyword(s):  
Visual Acuity ◽  
Foreign Body ◽  
Visual Outcome ◽  
Posterior Segment ◽  
Intraocular Foreign Body ◽  
Medical Sciences ◽  
Hand Motion ◽  
Magnetic Metal ◽  
Anatomical Success ◽  
Anatomical Outcome

AIM: To evaluate the anatomical and visual outcome following removal of intraocular foreign body (IOFB) through pars planavitrectomy.MATERIAL & METHODS: A retrospective analysis of 11 cases of retained posterior segment foreign body that underwent pars planavitrectomy for removal of foreign body during the period of January 2013 to August 2017 was conducted. Demographics of patients, mechanism and details of injury, Snellen best corrected visual acuity, examination results at presentation and after surgery, any diagnostic imaging and surgical procedure were recorded and analysed.RESULTS: Out of eleven eyes of eleven patients (mean age= 25.4}8.6, range 22 50 years; all male) preoperative retinal detachment and endophthalmitis was seen in 27.3% and 36.4% of cases respectively. Eighty-two percent of cases presented within 17 days of sustaining injury. Foreign body size ranged from 2mm to 8 mm and all were magnetic metal. After vitrectomy and removal of foreign body, the number of eyes with vision of hand motion or worse decreased from 72.7% to 27.3%. Similarly 45.5% of eyes gained best corrected postoperative visual acuity of better than 6/60. Anatomical success could be achieved in 81.8% of eyes.CONCLUSION: Anatomical outcome following vitrectomy in eyes with retained posterior segment IOFB in terms of retinal attachment is sufficient; however, visual outcome can be affected by other collateral ocular injuries and their sequelae.Journal of Universal College of Medical Sciences, Vol. 5, No. 2, 2017, Page: 45-48 

scholarly journals Combined Penetrating Keratoplasty Followed by Pars Plana Vitrectomy for Firecracker Induced Bilateral Corneal and Intraocular Foreign Body: A Case Report

2020 ◽  
Vol 58 (226) ◽  
Author(s):  
Lily Rajbanshi ◽  
Archana Kumari ◽  
Sanjay Singh
Keyword(s):  
Foreign Body ◽  
Pars Plana Vitrectomy ◽  
Penetrating Keratoplasty ◽  
Hand Movement ◽  
Intraocular Foreign Body ◽  
Corrected Visual Acuity ◽  
Open Globe ◽  
Pars Plana ◽  
The Right ◽  
Open Globe Injuries

Firecracker induced open globe injury is a big challenge for ophthalmic surgeons. Its associationwith the intraocular foreign body makes the diagnosis and treatment even more difficult resultingin poor anatomical and visual outcomes. We report a case of a 35-year-old male who presented withbilateral, multiple corneal and intraocular foreign body due to firecracker explosion. His vision waslimited to hand movement in both eyes. Combined penetrating keratoplasty and cataract surgerywere done in both eyes followed by pars plana vitrectomy for intraocular foreign body removal.The final best-corrected visual acuity of the patient stood to be 6/6 and 6/9 in the right and left eyerespectively. The encouraging result in our case prompts ophthalmologists for a timely stepwisemultidisciplinary approach in all open globe injuries with intraocular foreign body cases havingpoor initial acuity.

scholarly journals Posterior Segment Retained Intraocular Foreign Body: A Study from Western Nepal

2021 ◽  
Vol 13 (1) ◽  
pp. 22-30
Author(s):  
Bikram Bahadur Thapa ◽  
Sweta Singh ◽  
Gyanendra Lamichhane ◽  
Shanti Gurung ◽  
Saurav Piya
Keyword(s):  
Visual Acuity ◽  
Foreign Body ◽  
Retinal Detachment ◽  
Pars Plana Vitrectomy ◽  
Large Diameter ◽  
Visual Outcome ◽  
Posterior Segment ◽  
Intraocular Foreign Body ◽  
Pars Plana ◽  
The Mean

Introduction: Posterior segment retained Intraocular foreign body (IOFB) management is challenging. Facility of pars plana vitrectomy (PPV) and availability of well trained vitreo retina surgeons are the basic need to accomplish this work.  Encircling band provide permanent 360° support to close the anterior retinal break and prevent traction on the retina. The objective of this study is to analyse the clinical characteristics and predictors of the final visual outcome and survival of the globe in cases of retained IOFB in the posterior eye segment. Materials and methods: A hospital based retrospective observational study was conducted. All the patients of retained IOFB in the posterior segment presented from January 2016 to June 2019 were enrolled. Patients presented with visual acuity of NPL were excluded. Statistical analysis was performed using a variety of tests using SPSS version 21.   Results: Forty eyes of 40 patients were included. The mean age was 27.08±10.68 years (range 5-66). 95% of our patients were male. Most of them (52.5%) worked on the farm. 26(65%) of 40 eyes had Zone I injury. The median time spent before presentation was 13.5 day. Retinal detachment, vitreous hemorrhage, and endophthalmitis were present in 15, 23 and 5 eyes, respectively, before IOFB removal. The mean LogMAR visual acuity was improved significantly from 2.50±0.87 to 1.33± 1.01 (p=0.003). Poor presenting visual acuity, retinal detachment and large diameter of IOFB were found as the predictor of poor final visual acuity. Conclusion:  Pars plana vitrectomy by a vitreo retinal surgeon can give encouraging results in the cases of retained posterior segment IOFB. Poor presenting visual acuity, large diameter of IOFB and RD before IOFB removal are predictors of poor visual outcome.

scholarly journals Retained Metallic Intraocular Foreign Body With Excellent Visual Outcome

Cureus ◽  
2021 ◽  
Author(s):  
Poh Fong She ◽  
Evelyn Tai ◽  
Akmal Haliza Zamli ◽  
Rohana Abdul Rashid ◽  
Safinaz Mohd Khialdin
Keyword(s):  
Foreign Body ◽  
Visual Outcome ◽  
Intraocular Foreign Body

scholarly journals Penetrating Fish-Hook Ocular Injury: Management of an Unusual Intraocular Foreign Body

2014 ◽  
Vol 2014 ◽  
pp. 1-3 ◽  
Author(s):  
Ludovico Iannetti ◽  
Paolo Tortorella
Keyword(s):  
Foreign Body ◽  
Unusual Case ◽  
Ocular Trauma ◽  
Visual Outcome ◽  
Intraocular Foreign Body ◽  
Ocular Injury ◽  
Entrance Wound ◽  
Method Of Extraction ◽  
Fish Hook ◽  
Final Visual Outcome

Importance. Ocular penetrating fish-hook injuries represent an unusual and very dangerous ocular trauma. We report the management of an unusual case of a simple-single barbed fish-hook accident globe injury successfully treated with surgery.Observations. We described a case report of a caucasian 32-year-old man presented with a scleral perforation of the left eye caused by a fish-hook injury while fishing. The fish-hook penetrated the sclera, passed the trabecular meshwork, and exited into the anterior chamber. He underwent surgery under local anesthesia to remove the intraocular foreign body and to repair the wound. The hook was removed backing through the entrance wound, enlarge the primary scleral laceration. Final visual outcome, one month after trauma, was 0.0 LogMar.Conclusions and Relevance. Our unusual case shows a modified extraction technique of fish-hook from the eye. Although the fish-hook injury represents generally a serious occurrence, in some cases, a prompt and appropriate method of extraction can lead to a good final outcome.

Low-cut, low-vacuum vitrectomy for releasing an embedded intraocular foreign body

Trauma ◽  
2020 ◽  
pp. 146040862093576
Author(s):  
SK Aruna ◽  
Pratyusha Ganne ◽  
Prabu Baskaran
Keyword(s):  
Visual Acuity ◽  
Foreign Body ◽  
Retinal Detachment ◽  
Intraocular Foreign Body ◽  
Corrected Visual Acuity ◽  
Open Globe ◽  
Pars Plana ◽  
Oil Injection ◽  
Probe Set ◽  
Best Corrected Visual Acuity

Background Removal of an embedded intraocular foreign body remains challenging due to the risks of bleeding and retinal damage. We present a novel technique to deal with this situation. Case report A 32-year man presented with two months of decreased vision in one eye (best corrected visual acuity of 20/200), a year after a workplace injury that necessitated surgery for an open globe injury. Examination revealed the sequalae of his previous surgery, a subtotal retinal detachment and an embedded intraocular foreign body close to inferior ora serrata at the 6 'o clock position confirmed by imaging. The other eye was normal. A pars plana vitrectomy was performed and the embedded intraocular foreign body was released from surrounding dense adhesions using the vitrectomy probe set at 1000 cuts/minute and 100 mm Hg vacuum, followed by fluid air exchange and endolaser with silicon oil injection. The retinal detachment settled well post-operatively, and at the end of one month, the patient had best corrected visual acuity of 20/60. Conclusions The low-cut, low-vacuum vitrectomy technique can be considered as a safe option for releasing the embedded intraocular foreign body in complex ocular trauma scenarios.

Sign in / Sign up

Export Citation Format

Share Document