- Novel OCT Application and Optimized YAG Laser Enable Visualization and Treatment of Mid- to Posterior Vitreous Floaters. [Journal Article]
- OSOphthalmic Surg Lasers Imaging Retina 2018 Oct 01; 49(10):806-811
- Vitrectomy is an effective treatment for visually disabling vitreous opacities (floaters) but carries significant surgical risk. Nd:YAG laser vitreolysis using newer technology has been shown safe an...
Vitrectomy is an effective treatment for visually disabling vitreous opacities (floaters) but carries significant surgical risk. Nd:YAG laser vitreolysis using newer technology has been shown safe and effective in treating symptomatic Weiss ring vitreous floaters. These Weiss rings, as well as amorphous opacities in the mid- to posterior vitreous, can be impossible to visualize or treat using conventional YAG lasers. In the cases presented here, undetected symptomatic amorphous type posterior vitreous floaters were confirmed with assistance of a novel optical coherence tomography application and successfully treated using a YAG laser optimized for vitreolysis. These cases suggest that with proper technology and technique, laser vitreolysis may be safer and more effective than previously recognized. [Ophthalmic Surg Lasers Imaging Retina. 2018;49:806-811.].
- Coping with intrasexual behavioral differences: Capture-recapture abundance estimation of male cheetah. [Journal Article]
- EEEcol Evol 2018; 8(18):9171-9180
- Population estimates are a fundamental requirement of ecology and conservation. While capture-recapture models are an established method for producing such estimates, their assumption of homogeneous ...
Population estimates are a fundamental requirement of ecology and conservation. While capture-recapture models are an established method for producing such estimates, their assumption of homogeneous capture probabilities is problematic given that heterogeneity in individual capture probability is inherent to most species. Such variation must be accounted for by abundance models; otherwise, biased estimates are risked.Here, we investigate the performance of four types of heterogeneity models for estimating abundance of male cheetah Acinonyx jubatus, a species with two distinct spatial tactics of territorial and nonterritorial (floater) males. The differences in spatial movements of territory holders and floaters are expected to result in intrasexual heterogeneous capture probabilities. Four heterogeneity models were used to model male abundance at five territories in central Namibia; (a) a spatial tactic model, (b) a finite mixture model, both run in program MARK, (c) a floater-only model, and (d) a heterogeneity Mh model, both run in the program CAPTURE. Camera trap data of cheetah, taken at frequently visited marking trees, were used to derive true abundance. Model results were compared to the true abundance to assess the accuracy of estimates.Only models (a), (b), and (c) were able to consistently produce accurate results. Mixture models do not require prior knowledge regarding spatial tactic of males, which might not always be available. Therefore, we recommend such models as the preferred model type for cheetahs.Results highlight the potential for mixture models in overcoming the challenges of capture probability heterogeneity and in particular their use with species where intrasexual behavioral differences exist.
- Management of Giant Retinal Tear with microincision vitrectomy and metallic retinal tacks fixation-a case report. [Case Reports]
- BOBMC Ophthalmol 2018 Oct 22; 18(1):272
- CONCLUSIONS: Primary microincision vitrectomy using wide-angle viewing system with intraoperative perfluorocarbon liquids (PFCL) assistant, retinal tacks fixation and intraocular silicone oil tamponade appears to be safe and feasible for managing giant retinal tear with retinal detachment.
- Incidence of Management Changes at the Postoperative Week One Visit after Cataract Surgery: Results from the PCIOL Study. [Journal Article]
- AJAm J Ophthalmol 2018 Oct 16
- CONCLUSIONS: Unexpected management changes at the postoperative week one timepoint after cataract surgery are very rare in asymptomatic patients who have had uncomplicated cataract surgery and a routine postoperative day one examination. Limited data are available to outline an optimal postoperative regimen after cataract surgery. The results of this study suggest that postoperative week one examinations could potentially be done on an as needed basis in the appropriate subgroup of patients after cataract surgery.
- Progression of Eales' disease post-partum and long-term follow-up: a case report. [Journal Article]
- JMJ Med Case Rep 2018 Oct 17; 12(1):310
- CONCLUSIONS: In our case the systemic therapy was much less effective than the intravitreal sustained-release dexamethasone implant (Ozurdex®) for reducing recurrences and halting disease progression. We believe that recurrent and severe cases could benefit from this addition to the classic treatment armamentarium.
- Atypical Presentation of Bilateral Retinoblastoma with Floaters and Sub-Internal Limiting Membrane Seeds in an 11-Year-Old Asian Indian Male. [Journal Article]
- OOOcul Oncol Pathol 2018; 4(5):309-312
- CONCLUSIONS: Atypical manifestation of retinoblastoma can be seen in older children presenting with "floaters" and bilateral deposits of sub-ILM seeds, without solid tumor.
- Clinical and ophthalmic factors associated with the severity of sickle cell retinopathy. [Journal Article]
- AJAm J Ophthalmol 2018 Sep 29
- CONCLUSIONS: These findings may inform clinicians of the symptoms, systemic findings, and disease modifying therapies most frequently associated with SCR in SCD patients. Visual symptoms such as blurred vision or floaters were associated with progression of SCR, and may be criteria for referral for retinal examination. Chronic transfusion therapy may be protective against the need for retinal laser photocoagulation or vitrectomy. Prospective studies are necessary to further explore risk factors for SCR and to identify which individuals with SCD are at risk for incident or progression of retinopathy.
- Motion-induced blindness for dynamic targets: Further explorations of the perceptual scotoma hypothesis. [Journal Article]
- JVJ Vis 2018 Sep 04; 18(9):24
- Motion-induced blindness (MIB) is a striking phenomenon wherein fully visible and attended objects may repeatedly fluctuate into and out of conscious awareness when superimposed onto certain global m...
Motion-induced blindness (MIB) is a striking phenomenon wherein fully visible and attended objects may repeatedly fluctuate into and out of conscious awareness when superimposed onto certain global moving patterns. Perhaps the most remarkable feature of MIB is that objects can disappear even when they are moving. Here we report several novel demonstrations of MIB for dynamic objects, including the observations that (a) MIB can occur for dynamic targets defined by various types of complex visual distortions (akin to those that may occur with various types of metamorphopsias), and (b) MIB is more robust for downward-drifting compared to upward-drifting objects (perhaps because of the related motions of floaters in the eye's vitreous humor). To interpret these results, we focus on the idea that MIB may arise not from a limitation or failure of visual processing, but instead from a perceptual scotoma: MIB may reflect a functional inference in visual processing, eliminating some novel stimuli from awareness in much the same way that the visual system chronically eliminates percepts that would otherwise arise from visual impairments (such as scotomas) or features that are not in the external world in the first place (such as shadows from retinal blood vessels).
- Large Traumatic Retinal Dialysis Associated With Prominent Vitreous Base Avulsion. [Journal Article]
- OSOphthalmic Surg Lasers Imaging Retina 2018 Sep 01; 49(9):731
- A 13-year-old female with a history of regressed retinopathy of prematurity presented with new-onset floaters after sustaining blunt force trauma to her left eye. Best-corrected visual acuity was 20/...
A 13-year-old female with a history of regressed retinopathy of prematurity presented with new-onset floaters after sustaining blunt force trauma to her left eye. Best-corrected visual acuity was 20/20 in both eyes (OU), with an intraocular pressure of 14 mm Hg and 15 mm Hg in the right eye (OD) and left eye (OS), respectively. Exam under anesthesia revealed an unremarkable anterior segment OU, including no hyphema or subluxated crystalline lens. Scleral depression OS demonstrated a retinal dialysis superotemporally (1-o'clock to 3-o'clock) and nasally (7-o'clock to 10-o'clock) associated with a prominent vitreous base avulsion but no subretinal fluid (Figure). Scleral depression OD was unremarkable. Both areas of retinal dialysis OS were treated with three rows of indirect green laser photocoagulation posterior to the edge of the dialysis. [Ophthalmic Surg Lasers Imaging Retina. 2018;49:731.].
New Search Next
- Analysis of 130 Cases of Sympathetic Ophthalmia - A Retrospective Multicenter Case Series. [Journal Article]
- OIOcul Immunol Inflamm 2018 Sep 12; :1-8
- CONCLUSIONS: SO is a potentially sight-threatening disease with high rates of visual loss. It warrants prompt evaluation and treatment. With the advances and availability in immunotherapy, the visual prognosis is relatively good.