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New test needed to assess the quality and safety of sunglasses

medicalnewstoday eye health - 21 hours 13 min ago
Revision of standards is needed to test sunglasses quality and establish safe limits for the lenses' UV filters, according to research published in the open access journal Biomedical Engineering...
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Diabetes-related vision loss growing worldwide

medicalnewstoday eye health - Fri, 08/26/2016 - 9:00am
The number of people worldwide with vision loss from diabetic retinopathy is rising, representing an increasing proportion of the blind and sight-impaired.
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Artificial retinas: Promising leads towards clearer vision

medicalnewstoday eye health - Fri, 08/26/2016 - 2:00am
A major therapeutic challenge, the retinal prostheses that have been under development during the past ten years can enable some blind subjects to perceive light signals, but the image thus...
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Researchers find new role for cannabinoids in vision

medicalnewstoday eye health - Fri, 08/26/2016 - 2:00am
A multidisciplinary team including researchers from the Montreal Neurological Institute has improved our understanding of how cannabinoids, the active agent in marijuana, affect vision in...
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Efficacy of Topically Administered Rho-Kinase Inhibitor AR-12286 in Patients With Exfoliation Syndrome and Ocular Hypertension or Glaucoma

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Purpose: To evaluate the efficacy of rho-associated protein kinase inhibitor, AR-12286 topical solution, for its effect in eyes with exfoliation syndrome (XFS) and ocular hypertension (OHT) or exfoliative glaucoma (XFG) and examine any lasting effect on intraocular pressure (IOP) after discontinuation. Methods: Prospective, double-masked, randomized, interventional study. Patients with XFS and OHT or XFG were enrolled. The study eyes were treated once daily with AR-12286, randomized to 0.5% or 0.7% for 24 weeks. Visits included baseline, 1, 4, and 12 weeks after drug initiation; at 12 weeks AR-12286 was discontinued for 1 week and was resumed at week 13. At the week 24 visit, AR-12286 was discontinued, and a final reexamination was performed at week 25. Results: Ten patients were treated...
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Aqueous-Vortex Derivation: A Preliminary Study on Rabbits

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Conclusions: The results, corroborated by the anatomopathology, proved the viability of the aqueous-vortex derivation for the treatment of the ocular hypertension and some types of glaucoma with damage of the trabecular meshwork. (Source: Journal of Glaucoma)
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Puerarin Attenuates N-Methyl-D-aspartic Acid–induced Apoptosis and Retinal Ganglion Cell Damage Through the JNK/p38 MAPK Pathway

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Conclusions: The present results of this study demonstrated that puerarin protected against NMDA-induced apoptosis and RGCs damage through the JNK/p38 MAPK pathway. (Source: Journal of Glaucoma)
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The Wills Eye Glaucoma App: Interest of Patients and Their Caregivers in a Smartphone-based and Tablet-based Glaucoma Application

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Purpose: To evaluate the interest of glaucoma patients and their caregivers in a smartphone-based and tablet-based glaucoma application (App), developed by the Wills Eye Glaucoma Research Center in collaboration with Drexel University. Materials and Methods: Cross-sectional survey of patients with glaucoma and their caregivers. Main outcome measures are answers to survey questions regarding how receptive participants are to using the Glaucoma App. Results: Fifty subjects completed the survey. The mean age (SD) was 59.5 (±17.3) years. A total of 88.6% of the participants lived in a household with access to a smartphone or tablet. The majority (72.3%) of participants would consider downloading the Glaucoma App, and younger participants ( (Source: Journal of Glaucoma)
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Intraocular Pressure Outcomes Following Transscleral Diode Cyclophotocoagulation Using Long and Short Duration Burns

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Purpose: The purpose of this study was to compare outcomes of transscleral diode cyclophotocoagulation using short duration (SD) versus longer duration (LD) treatment. Patients and Methods: Data were collected retrospectively on patients with glaucoma who underwent cyclophotocoagulation with LD (4000 ms) treatment with variable power ≤1000 mW versus SD using 1500 ms with variable power ≤2000 mW. The outcome measures included: intraocular pressure (IOP) at 12 months, decrease in number of antiglaucoma medications, complications and visual acuity (VA) at the final follow-up visit. Results: There were 71 patients and 70 patients in the SD and LD groups, respectively. The mean IOP±SD pretreatment baseline was 33±10 versus 36±10 mm Hg for SD and LD groups, respectively (P>0.05). At 1 y...
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Comparison of Smartphone Ophthalmoscopy With Slit-Lamp Biomicroscopy for Grading Vertical Cup-to-Disc Ratio

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Purpose of the Study: The purpose of the study was to determine the agreement between smartphone ophthalmoscopy and slit-lamp indirect biomicroscopy when assessing vertical cup-to-disc ratios (VCDRs). Materials and Methods: This was a clinical-based, prospective, comparative instrument study performed in 110 patients with ocular hypertension (OH) or primary open angle glaucoma (POAG). Patients underwent estimation of VCDR by undilated smartphone ophthalmoscopy and slit-lamp biomicroscopy by 2 masked glaucoma specialists. Results: The differences between the mean VCDR estimations obtained by each techniques were not statistically significant. Overall exact agreement between the 2 modalities was found in 21 of 29 eyes (72.4%; simple κ=0.63, confidence interval, 0.52-0.73, P (Source: Journ...
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Comparison of Surgical Outcome After Ahmed Valve Implantation for Patients With and Without Fluocinolone Intravitreal Implant (Retisert)

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Conclusions: Patients who received a Retisert implantation had lower IOP and used fewer glaucoma eye drops compared with control eyes at 1-year post-Ahmed valve surgery. This study suggests that long-term, slow-release corticosteroid medication from Retisert (fluocinolone acetonide) may improve the surgical outcome for patients with an Ahmed valve implantation and/or Retisert helps control uveitis in patients with uveitic glaucoma receiving Ahmed valves. (Source: Journal of Glaucoma)
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Evaluation of Interocular Retinal Nerve Fiber Layer Thickness Symmetry as a Diagnostic Modality for Glaucoma

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Conclusions: The corrected interocular RNFL thickness symmetry value is an effective diagnostic tool for glaucoma. Interocular comparison of RNFL thickness has good diagnostic performance and gives information about the RNFL beyond just the RNFL thickness itself. (Source: Journal of Glaucoma)
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Squeeze Me if You Can: Variability in Force Requirements to Extract a Drop From Common Glaucoma Bottles

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Conclusions: There is statistically significant variability in the force required to squeeze a drop from common glaucoma medications, and a representative sampling of clinic patients suggests that many likely struggle with the force requirements of several bottle designs. These data further support standardization of topical glaucoma drug delivery and design. (Source: Journal of Glaucoma)
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Corneal Densitometry: A New Technique for Objective Assessment of Corneal Clarity in Pseudoexfoliation Syndrome

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Purpose: To evaluate the corneal clarity quantitatively by using corneal densitometry in patients with pseudoexfoliation syndrome (PES) and to compare the results with those of healthy control subjects. Materials and Methods: Corneal densitometry measurement of patients with bilateral PES and healthy control subjects was carried out by Scheimpflug corneal topography (PentacamHR). For densitometry analysis, the 12-mm diameter area of the cornea was subdivided into 4 concentric radial zones (0 to 2, 2 to 6, 6 to 10, 10 to 12 mm) and also into anterior, central, and posterior layers based on corneal depth. Corneal densitometry measurements were expressed in gray scale unit and only the data from the right eyes of subjects were used for statistical analysis. Results: A total of 176 patients ...
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The Association of Chronic Topical Prostaglandin Analog Use With Meibomian Gland Dysfunction

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Purpose: To evaluate the association of long-term prostaglandin analog (PGA) use with meibomian gland dysfunction (MGD) in medically treated glaucoma patients. Materials and Methods: This was a prospective cross-sectional study conducted at a single academic setting. In total, 70 eyes of 70 patients with a medical diagnosis of glaucoma who were on long-term (>12 mo) topical hypotensive medication(s) were included. Patients were classified based on whether they were on PGA or non-PGA class of medication(s). MGD was defined based on meibomian gland terminal duct obstruction and graded between 1 and 5 based on severity. For all subjects, ocular surface disease index questionnaire, break-up time, lissamine green staining, and Schirmer test (under topical anesthesia) was administered. Student ...
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Trabeculectomy and Combined Phacoemulsification-Trabeculectomy: Outcomes and Risk Factors for Failure in Primary Angle Closure Glaucoma

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Purpose: To evaluate tonometric outcomes of patients with primary angle closure glaucoma (PACG) who have undergone trabeculectomy with mitomycin C (MMC) with and without concurrent phacoemulsification and to identify risk factors for postoperative failure. Patients and Methods: Retrospective cohort study of 44 eyes of 33 phakic patients who underwent trabeculectomy with MMC with or without combined phacoemulsification for PACG. The primary endpoint was qualified tonometric success at 12 months according to predefined criteria. LogMAR visual acuity, number of glaucoma medications, and postoperative complications were also evaluated. Cox proportional hazard regression analysis was performed to identify potential risk factors for trabeculectomy failure. Results: Mean intraocular pressure (I...
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Ab Interno Trabeculectomy With the Trabectome as a Valuable Therapeutic Option for Failed Filtering Blebs

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Discussion: Trabectome surgery for uncontrolled IOP after trabeculectomy is safe and effective especially in PXG patients. Given the demanding subgroup of patients studied here, it is not surprising that success rates are lower compared with previous studies investigating the Trabectome for primary glaucoma surgery. The number of necessary IOP lowering medication drops at first, but seems to reach preoperative values after 20 months of follow-up. Trabectome surgery should be considered as a valuable escape procedure for patients with failed filtering blebs and uncontrolled IOP. (Source: Journal of Glaucoma)
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Reductions in Retrobulbar and Retinal Capillary Blood Flow Strongly Correlate With Changes in Optic Nerve Head and Retinal Morphology Over 4 Years in Open-angle Glaucoma Patients of African Descent Compared With Patients of European Descent

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Conclusions: Reductions in retinal capillary and retrobulbar blood flow strongly correlated with changes in the ONH and macular thickness over 4 years in OAG patients of AD compared with ED. These data suggest that ocular vascular health may be a more influential contributing factor in the pathophysiology of OAG in patients of AD compared with ED. (Source: Journal of Glaucoma)
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Trabeculotomy in the Treatment of Pediatric Uveitic Glaucoma

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Conclusions: Trabeculotomy is a safe and effective surgery for pediatric UG. (Source: Journal of Glaucoma)
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Ahmed Versus Baerveldt Glaucoma Drainage Implantation in Patients With Markedly Elevated Intraocular Pressure (≥30 mm Hg)

Journal of Glaucoma - Fri, 08/26/2016 - 12:43am
Purpose: Glaucoma patients with markedly elevated intraocular pressure (IOP) are at risk for developing severe hypotony-related complications. The goal of this study was to compare the surgical outcomes of the Ahmed Glaucoma Valve (AGV) and the Baerveldt Glaucoma Implant (BGI) in this patient population. Methods: Patients with preoperative IOP≥30 mm Hg were included. Outcome measures were: (1) surgical failure (IOP>21 mm Hg or (Source: Journal of Glaucoma)
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