• Users Online: 1166
  • Home
  • Print this page
  • Email this page
Export selected to
Endnote
Reference Manager
Procite
Medlars Format
RefWorks Format
BibTex Format
  Access statistics : Table of Contents
   2013| March  | Volume 61 | Issue 3  
    Online since March 21, 2013

 
 
  Archives   Previous Issue   Next Issue   Most popular articles   Most cited articles
 
Hide all abstracts  Show selected abstracts  Export selected to
  Viewed PDF Cited
EDITORIAL
Decoding retinitis pigmentosa
Sundaram Natarajan
March 2013, 61(3):91-94
DOI:10.4103/0301-4738.109372  PMID:23514641
  8,343 865 -
ORIGINAL ARTICLES
Improvement of central retinal sensitivity six months after topical isopropyl unoprostone in patients with retinitis pigmentosa
Ayako Tawada, Takeshi Sugawara, Kazuha Ogata, Akira Hagiwara, Shuichi Yamamoto
March 2013, 61(3):95-99
DOI:10.4103/0301-4738.109377  PMID:23514642
Aims: Isopropyl unoprostone (IU), a maxi-K channel activator, is used topically to treat glaucoma, and has been reported to have neuroprotective effects on retinal neurons in vitro and in vivo. The purpose of this non-comparative pilot study was to determine whether topical IU will alter the sensitivity of the central retina in patients with retinitis pigmentosa (RP). Settings and Design : Non-comparative pilot study. Materials and Methods : IU was given topically twice a day for 6 months to both eyes of 30 patients with typical RP. The visual acuity was measured with a Japanese Snellen chart, and the mean retinal sensitivities were obtained by fundus-related microperimetry (MP-1). The mean deviation (MD) of the visual field was determined with a Humphrey field analyzer (HFA). All measurements were made before and 6 months after the treatment. Statistical Analysis Used : Wilcoxon and the Mann-Whitney U tests (SPSS, SPSS Inc., Chicago, IL). Results: After the treatment, the mean retinal sensitivity within the central 2° and 10° improved significantly from 12.3 ± 4.8 dB to 14.7 ± 5.5 dB (P = 0.001) and from 9.1 ± 5.4 dB to 11.0 ± 6.2 dB (P = 0.001), respectively. Conclusions: These short-term results suggest topical IU can improve the central retinal sensitivity in RP patients. It will be necessary to examine longer treatment periods in a controlled study to determine the effectiveness of topical IU in RP patients.
  6,460 602 2
Color vision versus pattern visual evoked potentials in the assessment of subclinical optic pathway involvement in multiple sclerosis
Fatih C Gundogan, Ahmet Tas, Salih Altun, Oguzhan Oz, Uzeyir Erdem, Gungor Sobaci
March 2013, 61(3):100-103
DOI:10.4103/0301-4738.99842  PMID:23514643
Background: Optic pathway involvement in multiple sclerosis is frequently the initial sign in the disease process. In most clinical applications, pattern visual evoked potential (PVEP) is used in the assessment of optic pathway involvement. Objective: To question the value of PVEP against color vision assessment in the diagnosis of subclinical optic pathway involvement. Materials and Methods: This prospective, cross-sectional study included 20 multiple sclerosis patients without a history of optic neuritis, and 20 healthy control subjects. Farnsworth-Munsell (FM) 100-Hue testing and PVEPs to 60-min arc and 15-min arc checks by using Roland-Consult RetiScan® system were performed. P 100 amplitude, P 100 latency in PVEP and total error scores (TES) in FM 100-Hue test were assessed. Results: Expanded Disability Status Scale score and the time from diagnosis were 2.21 ± 2.53 (ranging from 0 to 7) and 4.1 ± 4.4 years. MS group showed significantly delayed P 100 latency for both checks (P < 0.001). Similarly, MS patients had significantly increased total error scores (TES) in FM-100 Hue (P < 0.001). The correlations between TESs and PVEP amplitudes / latencies were insignificant for both checks (P > 0.05 for all). 14 MS patients (70%) had an increased TESs in FM-100 Hue, 11 (55%) MS patients had delayed P 100 latency and 9 (45%) had reduced P 100 amplitude. The areas under the ROC curves were 0.944 for FM-100 Hue test, 0.753 for P 100 latency, and 0.173 for P 100 amplitude. Conclusions: Color vision testing seems to be more sensitive than PVEP in detecting subclinical visual pathway involvement in MS.
  4,995 613 1
Astigmatic changes following pterygium removal: Comparison of 5 different methods
Rana Altan-Yaycioglu, Cem Kucukerdonmez, Aylin Karalezli, Fatma Corak, Yonca A Akova
March 2013, 61(3):104-108
DOI:10.4103/0301-4738.109379  PMID:23514644
Aims: To investigate the effect of surgery type on the postoperative astigmatism in pterygium surgery. Settings and Design: Retrospective comparative clinical trial. Materials and Methods: Data of 240 eyes that underwent pterygium excision were investigated. Following removal of the pterygium, patients underwent 5 different types of surgeries: Conjunctival autograft with sutures (CAG-s) or fibrin glue (CAG-g), conjunctival rotational flap (CRF), or amniotic membrane transplantation with either suture (AMT-s) or with glue (AMT-g). The preoperative and postoperative keratometric measurements, evaluated using an automated keratorefractometer, were noted. Statistical Analysis: The overall changes in BCVA and astigmatic degree were evaluated using Wilcoxon signed rank test. The difference in astigmatic values between groups was calculated using one way analysis of variance (ANOVA). Results: The most commonly performed procedure was CAG-s (N = 115), followed by CAG-g (N = 53), CRF (N = 47), AMT-s (N = 15), and AMT-g (N = 10). Following surgery, astigmatic values decreased from 3.47 ± 2.50 D to 1.29 ± 1.07 D (P < 0.001, paired t test). The changes in astigmatism was significantly related to the preoperative size of the pterygium (ρ = 3.464, P = 0.005). The postoperative astigmatism correlated with preoperative astigmatism (ρ = 0.351, P < 0.001, Spearman correlation analysis). The changes in astigmatic values was not related to the method of surgery (P = 0.055, ANOVA). Conclusion: Pterygium results in high corneal astigmatism, which decreases to an acceptable level following excision. According to our study, the type of grafting as CAG, CRF or AMT or the use of suture or glue to fixate the graft does not have a significant effect on the change in astigmatism degree.
  4,864 696 1
Risk factors for intraocular pressure rise following phacoemulsification
Muge Coban-Karatas, Selcuk Sizmaz, Rana Altan-Yaycioglu, Handan Canan, Yonca Aydin Akova
March 2013, 61(3):115-118
DOI:10.4103/0301-4738.99997  PMID:23514646
Purpose: This study was designed to analyze the risk factors resulting in high intraocular pressure (IOP), which was accepted as IOP higher than 22 mmHg, following uncomplicated phacoemulsification. Materials and Methods: The records of 812 eyes of 584 patients who underwent uncomplicated phacoemulsification were evaluated. There were 330 men and 254 women ranging between the age of 26 and 89 years (65.4 ± 9.8 years). The preoperative, postoperative first day (day 1), first week (day 7), and first month (day 30) IOP values were analyzed. Data on history of diabetes, glaucoma, pseudoexfoliation (PXF), incision site, capsular staining with trypan blue, and surgeon were recorded. A multinomial regression analysis was performed to analyse the relationship of the factors with postoperative high IOP. Results: The mean IOP was 15.6 ± 4.3 mmHg preoperatively. Postoperatively that were changed to 19.7 ± 9.0 mmHg at day 1, 12.7 ± 4.5 mmHg at day 7, and 12.8 ± 3.7 mmHg at day 30. The factors such as surgeon, presence of PXF, diabetes, surgical incision site, and trypan blue were not related to the postoperative high IOP (P > 0.05, in all). The only factor that related to high IOP at all visits was glaucoma (P < 0.005). Conclusion: According to our results, preoperative diagnosis of glaucoma seems to be the only factor to affect the postoperative IOP higher than 22 mmHg.
  4,319 534 -
The impact of octreotide in experimental proliferative vitreoretinopathy
Ozge Evren, Burak Turgut, Ulku Celiker, Kadir Ates
March 2013, 61(3):109-114
PMID:23514645
Aims: This study aims to investigate the effects of intravitreal octreotide on the growth factors, which have significant roles in the pathogenesis of proliferative vitreoretinopathy (PVR). Settings and Design: An experimental trial. Materials and Methods: 21 guinea pigs were randomly assigned to form 3 groups each including 7 animals. In group 1 (the control group), 0.2 ml saline solution was applied intravitreally in a location of 1.5 mm behind the limbus. In group 2 (the sham group), 0.07 IU dispase in 0.1 ml and 0.1 ml saline solution were applied via the same route. The guinea pigs in group 3 (the treatment group) were applied 0.07 IU dispase in 0.1 ml and 1 mg octreotide in 0.1 ml via the same route. Octreotide injection was applied twice during the period of 10 weeks of the experiment. At the end of the 10 weeks, eyes were enucleated and retinal homogenates were prepared. The platelet derivated growth factor (PDGF), insulin-like growth factor (IGF 1) and transforming growth factor (TGF ß) levels in homogenized retina tissue were measured by Enzyme Linked-Immuno-Sorbent Assay (ELISA) method. Statistical Analysis Used: Kruskal-Wallis variance analysis and Mann-Whitney U test. Results: In the treatment group, a significant decrease was observed in retinal PDGF levels (P < 0.01) while decreases in TGF ß and IGF 1 levels were not found to be significant (P > 0.05). Conclusions: Intravitreally applied octreotide at a dose of 1 mg has a highly strong effect on PDGF. This study suggests that intravitreal octreotide may suppress PVR development and that octreotide may merit investigation for PVR prophylaxis.
  3,625 168 -
LETTERS TO THE EDITOR
Retinitis pigmentosa associated with ectopia lentis in a patient with Marfan syndrome
Jifeng Yu, Li Liang, Yuqin Wen, Yifei Huang
March 2013, 61(3):133-135
DOI:10.4103/0301-4738.109387  PMID:23514654
  3,648 135 -
Cryotherapy for presumed parasitic angle granuloma causing acute anterior granulomatous uveitis
N Venugopal, G Kummararaj, Sherin Kummararaj
March 2013, 61(3):135-136
DOI:10.4103/0301-4738.109388  PMID:23514655
  3,636 116 1
BRIEF COMMUNICATIONS
Test retest variability of TonoPen AVIA
Shibal Bhartiya, Shveta J Bali, Mathew James, Anita Panda, Tanuj Dada
March 2013, 61(3):129-131
DOI:10.4103/0301-4738.109384  PMID:23514651
The study was conducted to evaluate the intra-session repeatability of Tonopen AVIA (TPA). 180 eyes of 180 patients (50 eyes with glaucoma, 130 eyes of controls) were recruited for this observational study. The mean age of patients enrolled in the study was 43.9 ± 16.7 yrs (84 males, 96 females). Mean IOP recorded with Tonopen AVIA was 19.5 ± 9.5 mmHg, 19.4 ± 9.6 mmHg and 19.3 ± 9.2 mmHg, respectively in the first, second and third instances (P = 0.656). The intraclass correlation coefficient (ICC) ranged from 0.996 (95% CI: 0.956 - 0.998) for glaucoma subjects to 0.958 (95% CI: 0.934 - 0.975) for controls. The coefficient of variation in the study population ranged from 3.47% (glaucoma patients) to 8.10% (healthy controls), being 6.07% overall. The coefficient of repeatability varied between 2.96 (glaucoma patients), 3.35 (healthy controls) to 3.24 (overall). Thus, the Tonopen Avia shows good intrasessional repeatability of IOP in both glaucomatous patients and healthy subjects.
  3,202 197 4
Vertical fixation with fibrin glue-assisted secondary posterior chamber intraocular lens implantation in a case of surgical aphakia
Jeevan S Ladi, Nitant A Shah
March 2013, 61(3):126-129
DOI:10.4103/0301-4738.109383  PMID:23514650
We report the first case of vertical fixation by fibrin glue-assisted secondary posterior chamber intraocular lens implantation in a case of surgical aphakia. Advantages of vertical fixation are discussed.
  3,197 184 1
Management of retinal detachment in block related globe perforation with pneumatic retinopexy
Karandeep Rishi, Pradeep Venkatesh, Satpal P Garg
March 2013, 61(3):131-132
DOI:10.4103/0301-4738.109385  PMID:23514652
Retinal detachment after ocular perforation related to local anesthesia is a common complication, which is usually associated with a poor prognosis despite complex vitreoretinal surgical procedures. We report a case of 62-year-old male with cataract surgery done 4 weeks back with nasal retinal detachment with a posterior break. Pneumatic retinopexy was performed and laser barrage of the breaks was done the next day when the retina got attached. A vision of 20/30 was achieved at the end of 2 months. To the best of our knowledge, this is a first case report in literature where pneumatic retinopexy was used to manage a retinal detachment caused by block-related perforation.
  3,171 171 -
LETTERS TO THE EDITOR
Intravitreal bevacizumab monotherapy for treatment-naïve polypoidal choroidal vasculopathy
Jay Kumar Chhablani, Ritesh Narula, Raja Narayanan
March 2013, 61(3):136-138
DOI:10.4103/0301-4738.109390  PMID:23514656
  3,147 160 1
An unusual case of peripheral ulcerative keratitis as a presenting feature in an otherwise healthy patient with undiagnosed human immunodeficiency virus infection and low CD4 counts
Navin D Soni, Avinash B Ingole, Sujit M Murade
March 2013, 61(3):138-139
DOI:10.4103/0301-4738.109391  PMID:23514657
  3,065 180 -
BRIEF COMMUNICATIONS
Inadvertent rupture of iridociliary cyst following transscleral Diode laser
Nikhil S Choudhari, Gangaprasad M Amula, Aditya Neog
March 2013, 61(3):124-126
DOI:10.4103/0301-4738.109382  PMID:23514649
Primary iridociliary cysts can induce plateau iris configuration and angle closure glaucoma. We report a patient with bilateral, primary, ring-shaped, solitary iridociliary cysts. The right eye displayed normal intraocular pressure, oppositional iridocorneal angle closure, and healthy optic nerve head. The left eye had advanced chronic angle closure glaucoma. The management strategy varied between eyes and is discussed. This, to the best of our knowledge, is the first report of transscleral Diode laser application in an eye with a large iridociliary cyst.
  2,955 146 -
LETTERS TO THE EDITOR
Compressive optic neuropathy: A unique presentation of Sweet syndrome
Chiang Ling Koay, Fiona Lee Min Chew, Kheng Yaw Chong, Visvaraja Subrayan
March 2013, 61(3):140-141
DOI:10.4103/0301-4738.97562  PMID:23514659
  2,408 177 -
OPHTHALMOLOGY PRACTICE
Is the observed lowering of intraocular pressure due to treatment?
Ravi Thomas, Kerrie Mengersen
March 2013, 61(3):119-121
DOI:10.4103/0301-4738.107908  PMID:23514647
Objective: Use Bayes' theorem to estimate the intraocular pressure (IOP) lowering effect of medical treatment initiated for glaucoma and determine if IOP comparisons to the baseline IOP of the same eye is clinically useful. Materials and Methods: The probability that treatment with prostaglandin is responsible for an observed 20% decrease in IOP with prostaglandin treatment was calculated using Bayes' theorem using the following available information: the probability of a 20% decrease in IOP given treatment with prostaglandin, the probability of a treatment effect using prostaglandin and the overall probability of a 20% decrease in IOP. The calculations were repeated to account for a possible 2 mmHg overestimation of effect caused by measurement error in performing applanation tonometry. Results: The probability that treatment is responsible for an observed 20% decrease in IOP following initiation of treatment with a prostaglandin was 99%. After adjusting for measurement error this probability was 98%. Obtaining two IOP measurements marginally increased the probability. Conclusion: Following initiation of treatment with prostaglandin, Bayes' theorem allows us to infer that treatment effect is the most likely explanation for an observed 20% decrease in IOP from the baseline; this inference remains even after adjusting for known measurement error. The high probability of a treatment effect is due to the high prior odds of treatment effect and the high likelihood ratio for prostaglandin producing such an effect. If data is available, similar calculations can be used for other percentage decreases, other medications and for the monocular trial.
  2,245 222 -
BRIEF COMMUNICATIONS
Geleophysic dysplasia associated with bilateral angle closure glaucoma
Murat Sinan Saricaoglu, Dilek Güven, Ahmet Karakurt, Hikmet Hasiripi
March 2013, 61(3):122-124
DOI:10.4103/0301-4738.104401  PMID:23514648
In this case report, we present occurrence of bilateral angle closure glaucoma in a 9-year-old girl with geleophysic dysplasia. Bilateral YAG laser iridotomy was applied, but intraocular pressure (IOP) remained at high levels, necessitating bilateral trabeculectomy with mitomycin C. On her follow-up examinations for 3 years, IOP remained in the mid-20s with no need for further intervention or antiglaucoma medication. There are few reports describing the ocular findings of geleophysic dysplasia in literature. To our knowledge, this is the first case report describing an application of glaucoma surgery and its results at geleophysic dysplasia.
  2,207 128 -
LETTERS TO THE EDITOR
Transient cortical blindness after spinal surgery as initial presenting sign of hereditary thrombophilia
Betul Tugcu, Bilge Araz-Ersan, Gülay Eren, Hakan Selçuk, Ulviye Yigit
March 2013, 61(3):139-140
DOI:10.4103/0301-4738.97565  PMID:23514658
  2,158 129 -
Charles Bonnet Syndrome: Comorbidity may help in choosing the drug for therapy
Ashok K Dubey
March 2013, 61(3):133-133
DOI:10.4103/0301-4738.97563  PMID:23514653
  1,835 144 -