Vivek B Wani

Vitrectomy for posterior segment intraocular foreign bodies: visual results and prognostic factors.

Purpose To evaluate the visual results and determine the prognostic factors after the removal of retained posterior segment intraocular foreign bodies (IOFBs) by pars plana vitrectomy. Methods A retrospective study of 40 consecutive cases of pars plana vitrectomy for the removal of IOFBs during the period of January 1991 to June 2000 was conducted. Association between visual outcome and various preoperative, operative, and postoperative variables was statistically analyzed. Results Of the 40 cases available for the study, the IOFBs could be removed in 36 eyes. Half the patients had removal of the IOFB within 14 days of the injury. Nineteen patients (47.5%) achieved a visual acuity of 20/40 or better. Postoperative retinal detachment occurred in 13 patients (32.5%). Poor visual outcome was found to be significantly associated with poor initial visual acuity and postoperative retinal detachment, whereas good visual outcome was significantly associated with the absence of lens injury and absence of postoperative retinal detachment. Conclusions Acceptable visual results could be achieved after the removal of posterior segment IOFBs by vitrectomy, despite a delay in surgery. Postoperative retinal detachment, poor initial visual acuity, and the absence of lens injury were the factors that played a significant role in determining the visual outcome.

Results of screening for retinopathy of prematurity in a large nursery in Kuwait: Incidence and risk factors.

Aims: The aim of the study was to report the incidence of retinopathy of prematurity (ROP) and severe ROP and identify the risk factors for their development in a large nursery in Kuwait. Materials and Methods: This was a retrospective, interventional, non-comparative, hospital-based study. Retrospective review of ROP records of premature babies having either birth weight of less than 1501 g or gestational age at birth of 34 weeks or less and born between January 2001 and August 2003. Statistical Analysis: By univariate and multivariate logistic regression analysis. Results: Out of the 599 babies studied, 38.9% developed ROP and 7.8% needed treatment for severe ROP. Multivariate analysis showed low birth weight (OR 13.753, 95% CI 3.66-51.54; (P < 0.001), gestational age (OR 13.75, 95% CI 3.66-51.54; P < 0.001), surfactant (OR 1.72, 95% CI 1.04-2.83; P = 0.032) and stay in the intensive care unit for longer than 15 days (OR 2.25, 95% CI 1.05-4.85; P = 0.033) to be significant for the development of any ROP. Low birth weight (OR 22.86, 95% CI 3.86-134.82; P = 0.001), bacterial sepsis (OR 3.27, 95% CI 1.51-7.05; P = 0.002) and need for surfactant (OR 4.41, 95% CI 0.94 -20.56; P = 0.059) were found to be the risk factors for severe ROP needing laser treatment. Conclusion: The incidence of both any ROP and ROP needing treatment are comparable to other studies. Low birth weight is the most important risk factor for both any ROP and severe ROP.

Applications of endoscopy in vitreoretinal surgery.

Applications of Endoscopy in Vitreoretinal Surgery The first prototype of an ocular endoscope was reported in 1934 for removing nonmagnetic intravitreal foreign bodies.1 This initial prototype needed further technological improvements in miniature optics, charge coupled device (CCD), video cameras, and advances in flexible optical fiber to make the ocular endoscope a useful adjunct in ophthalmic surgery.2–6 The presence of corneal opacity, small pupil, hyphema, opacified or contracted anterior, and posterior capsule obscure or prevent the view of the retina during vitreoretinal surgery through conventional viewing systems; and therefore, in such cases, the ophthalmic microendoscope has been claimed to be useful.7 It can also be useful in the removal of membranes from the peripheral retina and ciliary body areas which are otherwise difficult to visualize by conventional viewing systems during vitrectomy.7,8 Other uses of ocular endoscopes include photocoagulation of ciliary processes,9,10 subretinal surgery,11 fluorescein angiography of the peripheral retina,12 visualization of intravitreal ganciclovir implants,13 removal of dislocated nuclear fragments situated in the periphery of the retina,14 surgery for sulcus fixation of posterior chamber intraocular lens (PCIOL),15 removal of intraocular foreign bodies,16 and for the surgical management of complex retinal detachment (RD).17 The objective of this study is to present our experience in the use of endoscopic vitreoretinal surgery (EndoVRS) in Kuwait. To the best of our knowledge, this is the first report regarding the use of endoscope in vitreoretinal surgery from the Middle East. Subjects and Methods

Endophthalmitis after vitrectomy and vitrectomy combined with phacoemulsification: incidence and visual outcomes

Purpose To study the incidence of endophthalmitis after vitrectomy and after combined vitrectomy and phacoemulsification surgery and to report the results of treatment in such cases. Methods This is a retrospective, noncomparative, interventional study based at a tertiary ophthalmology center in Kuwait. Cases of vitrectomy only and combined vitrectomy with phacoemulsification surgery performed during the period from January 1, 1997, to December 31, 2007, were included. Patients undergoing vitrectomy for traumatic etiologies and endophthalmitis were excluded. Patients who developed endophthalmitis after vitrectomy were identified and their records were analyzed. Results Six patients developed endophthalmitis among 2965 cases of all vitrectomy procedures, resulting in an incidence of 0.20%. The incidence of endophthalmitis was 0.12% for cases undergoing vitrectomy (3 out of 2564 cases) and 0.75% for cases undergoing combined vitrectomy and phacoemulsification surgery (3 out of 401 cases), respectively. Three cases were culture positive. Four cases ended up with final visual acuity of perception of hand movements or worse. Conclusions Incidence of endophthalmitis in our series was higher than in other studies. The visual results were poor in 4 out of 6 cases. Earlier diagnosis and more aggressive approach may be needed to improve the results of treatment in these cases.

Incidence of Endophthalmitis after Intravitreal Bevacizumab using Aliquots Prepared On-site in 2 Operating Rooms in Kuwait.

Purpose: To report the incidence of endophthalmitis after intravitreal injection of bevacizumab and the outcomes of treatment of endophthalmitis at two centers in Kuwait. Subjects and Methods: The aliquots of bevacizumab were prepared under aseptic precautions and administered in the operating theater on the same day at both centers. All patients received antibiotic drops after injection of bevacizumab. Data were collected on the number of cases that received intravitreal bevacizumab (IVB) and those that developed endophthalmitis were identified at the two centers. All cases of endophthalmitis received an intravitreal antibiotic injection and additional treatments as warranted. Data were collected on the outcomes of endophthalmitis treatment. Results: There were 5 cases of endophthalmitis among a total of 5429 injections (0.09%: Confidence interval: 0.084–0.1). The incidence was 3 cases among 4690 (0.06%) and 2 cases among 739 injections (0.027%) at each center, respectively (P = 0.08). Four cases of endophthalmitis were culture-positive and organisms isolated were, coagulase negative Staphylococcus in 2 cases, Staphylococcus lugdunensis and Streptococcus pneumoniae in 1 case each. The final visual acuity was better than pre-IVB in 3 cases, same as pre-IVB in 1 case and worse in 1 case with streptococcal infection. No eyes developed phthisis bulbi or required enucleation. Conclusions: The incidence of endophthalmitis after intravitreal injection of bevacizumab using aliquots prepared in the operating room is comparable to other studies. There were no clusters of endophthalmitis cases.

Structural and functional results of indirect diode laser treatment for retinopathy of prematurity from 1999 to 2003 in Kuwait

Purpose The purpose was to report the structural, visual, and refractive outcomes of infants treated for retinopathy of prematurity (ROP) with laser and to identify the risk factors for unfavorable outcomes. Materials and methods The charts of infants with severe ROP treated by diode laser in a tertiary center during the period April 1999 to November 2003 were reviewed. Treated infants were followed up for fundus examination, visual acuity assessment, and cycloplegic refraction. Data regarding ocular risk factors, like zones of ROP and the extent of extraretinal proliferations, and data regarding various systemic risk factors were collected. A minimum follow up of 6 months was needed for inclusion in the study of structural outcome. A minimum follow up of 24 months was needed for the study of visual and refractive outcomes. The outcomes measured were: rate of unfavorable structural outcome, unfavorable visual outcome (visual acuity < 20/40), and high myopia (myopia ≥ 5 diopters). The ocular and systemic risk factors were studied for their significance in the development of unfavorable outcomes. Results Two hundred seventy eyes of 148 infants were treated for severe ROP, out of which 20 eyes (7.4%) had unfavorable structural outcome. Visual data were available for 149 eyes of 81 infants, of which 70 eyes (47%) had unfavorable visual outcome. Refractive data were available for 131 eyes of 72 infants, and high myopia was present in 23 (17.6%) eyes. Zone I disease was the significant risk factor for unfavorable structural (P < 0.0001), unfavorable visual outcome (P = 0.03), and for high myopia (P < 0.0001). Lower post-conceptional age at treatment was significant for unfavorable structural outcome (P = 0.03) and high myopia (P < 0.0001). Presence of sepsis (P = 0.029) and extraretinal proliferation ≥ 6 hours were significant for unfavorable structural outcome (P = 0.002). Conclusion ROP in zone I was the most significant risk factor for all the unfavorable outcomes. Laser-treated ROP infants need long term follow up.

Partial-thickness macular hole in vitreomacular traction syndrome: a case report and review of the literature

IntroductionVitreomacular traction syndrome has recently been recognized as a distinct clinical condition. It may lead to many complications, such as cystoid macular edema, macular pucker formation, tractional macular detachment, and full-thickness macular hole formation.Case presentationWe report a case of vitreomacular traction syndrome with eccentric traction at the macula and a partial-thickness macular hole in a 63-year-old Pakistani Punjabi man. The patient was evaluated using optical coherence tomography, and he underwent a successful pars plana vitrectomy. After the operation, his foveal contour regained normal configuration, and his visual acuity improved from 20/60 to 20/30.ConclusionsPars plana vitrectomy prevents the progression of a partial thickness macular hole in vitreomacular traction syndrome. The relief of traction by vitrectomy restores foveal anatomy and visual acuity in this condition.

Type I retinopathy of prematurity in infants with birth weight less than 1251 g: Incidence and risk factors for its development in a nursery in Kuwait

Purpose: To report the rate of acute retinopathy of prematurity (ROP) and Type I ROP among infants with birth weight (BW) <1251 g and identify the risk factors for the development of Type I ROP. Materials and Methods: A retrospective review of ROP records of infants with BW <1251 g was performed to identify infants with acute ROP and Type I ROP. Infants with Type I ROP were compared with those without Type I ROP to assess the risk factors for the development of Type I ROP. P < 0.05 was statistically significant. Multivariate analysis was performed and odds ratio (OR) and 95% confidence intervals (CI) were calculated. Results: Among the 207 infants with BW <1251 g, acute ROP occurred in 154 infants (74.4%) and Type I ROP in 95 eyes of 50 infants (24.4%). The numbers of infants with BW <750 g and BW <1000 g were 19.3% and 58.4%, respectively, and the incidences of Type I ROP were 50% and 36.4%, respectively, among them. Forty-four (46.3%) eyes were treated at stage 2+ ROP in zone I or II. All the eyes treated for Type I ROP showed complete regression. Gestational age at birth (OR 0.657, 95% CI: 0.521-0.827; P < 0.0001) and number of ventilated days (OR 1.017, 95% CI: 1.005-1.029; P = 0.006) were identified as independent risk factors for the development of Type I ROP. Conclusions: The rate of Type I ROP in this study is higher than that in previous studies due to the higher number of infants with BW <1000 g in our cohort and the treatment of more eyes with stage 2+ ROP. However, all the treated eyes had a favorable outcome. Gestational age at birth and number of ventilated days were independent risk factors for the development of Type I ROP.

Resolution of bilateral multifocal subretinal cysticercosis without significant inflammatory sequelae

Cysticercosis is caused by Cysticercus cellulosae, the most common platyhelminth infesting the human eye. 1 C. cellulosae is the larval stage of the tapeworm Taenia solium. The adult worm lives in the intestine, whereas the larva can exist in various tissues, including the eye. Humans are usually infected following the ingestion of undercooked meat containing viable larvae. Although humans are usually the final hosts, ocular involvement is more typical when humans act as the intermediate hosts. The eye is the most common site of organ involvement following infection by Cysticercosis (13% to 46% of cases).1·2 Within the eye the subretinal space is most often involved;3 the organism has also been noted in the anterior chamber,4 vitreous,4•5 subconjunctival space,4 eyelids,6 orbit? and, rarely, optic nerve canal.8 Clinically most patients present with a unilateral unifocal subretinal lobulated cystic lesion. In most cases surgical intervention is performed to remove the organism from the subretinal space to prevent the severe inflammatory sequelae often associated with the death of the organism. We present a case of bilateral multifocal subretinal cysticercosis that resolved without significant inflammatory sequelae after a short course of systemic prednisone therapy.

A case of submacular cysticercosis treated by pars plana vitrectomy in Kuwait

We report a case of submacular cysticercosis in the left eye of an Indian patient living in Kuwait. Though he was systemically asymptomatic, his magnetic resonance imaging showed multiple cysts in the brain. The patient underwent pars plana vitrectomy (PPV), and the cyst was removed in total through a retinotomy over the cyst. He had another small cyst in the periphery that was also removed. He was treated with oral albendazole and systemic steroids after the surgery to treat his neurocysticercosis. He developed rhegmatogenous retinal detachment after the surgery, and the retina was successfully reattached with scleral buckling and PPV procedure. His final best corrected visual acuity improved from counting fingers at 1/2 m at presentation to 20/400. This case report shows that the ocular cysticercosis may be seen among expatriates working in the Middle East. It is important to rule out the presence of neurocysticercosis in such patients as well as multiple cysts in the affected eye. However, the functional outcome of surgical treatment of submacular cysticercosis can be disappointing.