Orbital floor fracture with entrapment: Imaging and clinical correlations in 45 cases.

Orbital floor fractures (OFF) with entrapment require prompt clinical and radiographic recognition for timely surgical correction. Correct CT radiographic interpretation of entrapped fractures can be subtle and thus missed. We reviewed the clinical, radiographic and intraoperative findings of 45 cases of entrapped OFF to correlate pre- and intraoperative findings with radiography. Retrospective review and statistical analysis of 45 patients with OFF using the chi squared and Kruskal-Wallis tests. Main outcome measures included patient demographics, clinical features, radiologic interpretation, intraoperative findings, and treatment outcomes. Twenty-one cases (47%) had radiologic evaluations of orbital CT scans that included commentary on possible entrapment. Intraoperatively, 16 (76%) of these patients had the inferior rectus muscle incarcerated in the fracture, while 5 (24%) patients had incarceration of the orbital fat. Possibility of entrapment was not commented on in the radiology reports of the remaining 24 (53%) cases. Intraoperatively, 13 (54%) of these patients had the inferior rectus muscle incarcerated in the fracture, while 11 (46%) patients had incarceration of the orbital fat. It is vital to assess the possibility of entrapment, especially in young patients, in the setting of OFF as a delay in diagnosis may lead to persistent diplopia, disfigurement, or bradycardia. Most radiology reports did not mention the possibility of entrapment in this cohort. A key concept is that entrapment occurs when any orbital tissue (muscle or fat) is trapped in the fracture site.

OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY FEATURES OF BRANCH RETINAL VEIN OCCLUSION.

PURPOSE: Optical coherence tomography angiography (OCTA) is a novel technology that uses motion contrast instead of dye to generate angiographic images. Using several modalities of OCTA, the authors describe and compare changes observed in branch retinal vein occlusion. METHODS: A case series of three patients with OCTA imaging. RESULTS: Despite presenting at different time frames, the authors found common imaging findings consisting of vascular hypoperfusion, increased tortuosity, and telangiectasia in all their cases. Furthermore, macular edema and intraretinal fluid were noted on the en-face angiograms. The extent of vascular and structural alterations could clearly be delineated in superficial and deep retinal networks. However, fine capillary alterations were better appreciated on smaller-size scans. CONCLUSION: With the ability to noninvasively visualize vascular flow, OCTA could serve as a new diagnostic tool for current ophthalmic research and clinical practice. Such findings can help supplement other imaging modalities in establishing a diagnosis and monitoring disease progression over time. This would potentially be useful in regard to ischemic processes such as branch retinal vein occlusion and diseases affecting different layers of the retinal vasculature.

Ophthalmic Complications Associated with Direct Oral Anticoagulant Medications.

OBJECTIVE: To describe the clinical features and management of six patients with ocular complications associated with direct oral anticoagulants (DOACs). METHODS: The medical records of all adult patients known to be taking a DOAC and with an unusual bleeding event at a large tertiary referral center over a one-year period were reviewed. Patients with less than one-month follow-up were excluded. Data collection included relevant clinic notes, operative reports, surgical videos, and clinical images (fundus photography, optical coherence tomography, B-scan ultrasonography, and fluorescein angiography). RESULTS: Six eyes in six patients were identified with an unusual bleeding event associated with DOAC use. One patient was taking apixaban, two patients were taking dabigatran, and three patients were taking rivaroxaban. Two patients had large submacular hemorrhage (including one with vitreous hemorrhage breakthrough), three patients had vitreous hemorrhage, and one patient had recurrent hyphema. Presenting visual acuity ranged from 20/40 to light perception. Three individuals required therapeutic and/or diagnostic pars plana vitrectomy for vitreous hemorrhage. Final visual acuity ranged from 20/25 to count finger vision. The associated DOAC was permanently discontinued in two of the six cases. Follow-up was one to four months from onset of identified DOAC-related complication. CONCLUSIONS: DOAC use may be associated with ocular bleeding. Ophthalmologists should be aware of potential hemorrhagic complications and obtain consultation with primary providers regarding DOAC cessation guidelines.

Anterior chamber cholesterolosis in a patient with retinoblastoma.

Anterior chamber cholesterolosis is a rare phenomenon typically associated with non-neoplastic conditions such as hyphema or Coats disease; it has never been reported to be associated with intraocular malignancy. We report a case of anterior chamber cholesterolosis presenting in the setting of retinoblastoma and discuss clinical features relevant for its differentiation from Coats disease.

In Vivo Assessment of Macular Vascular Density in Healthy Human Eyes Using Optical Coherence Tomography Angiography.

PURPOSE: To quantify density of macular vascular networks over regions of interest in healthy subjects using optical coherence tomography angiography (OCTA). DESIGN: Prospective cross-sectional study. METHODS: Setting was the Retina and Oncology Services of Wills Eye Hospital. Subjects with no known systemic disease and without retinal pathology were included. OCTA was performed on a 3 × 3-mm region centered on the macula and en face angiograms of the superficial and deep vascular networks were acquired. Vascular density was calculated using an automated image thresholding method over regions of interest. Foveal and parafoveal vascular density were calculated. The differences between vascular networks, sexes, and fellow eyes and correlation between vascular density, signal strength, and age, as well as reproducibility of measurements, were evaluated. RESULTS: A total of 198 healthy eyes were imaged, from which 163 eyes of 122 subjects were included based on image quality criteria. In the parafoveal region, deep vascular density was significantly higher than the superficial (52% ± 2.4% vs 46% ± 2.2%; P < .001), whereas the opposite was found in the foveal region (27% ± 5.2% vs 32% ± 3.2%; P < .001). All vascular density measurements were statistically similar in fellow eyes and there was no sex difference (P > .05). There was a negative correlation between vascular density and age that persisted upon adjusting for signal strength. Vascular density measurements were highly correlated between separate imaging sessions with intraclass correlation coefficients of over 0.85 for all assessments. CONCLUSIONS: Calculation of vascular density using OCTA is a reproducible and noninvasive method to quantitate individual networks within the macula. Understanding normal values and their correlations could affect clinical evaluation of the macula in healthy patients and disease states.

Optical Coherence Tomography Angiography and En Face Optical Coherence Tomography Features of Paracentral Acute Middle Maculopathy.

PURPOSE: To characterize the optical coherence tomography (OCT) angiography, en face OCT, and microperimetry features of paracentral acute middle maculopathy in both the acute phase and after resolution, and to propose a classification of distinct subtypes of this entity. DESIGN: Retrospective observational case series. METHODS: Clinical histories, high-resolution digital color imaging, spectral-domain OCT images, fluorescein angiography, OCT angiography images, and en face OCT images of 16 patients with paracentral acute middle maculopathy were evaluated. Microperimetry was available in 6 patients. RESULTS: The most common referring diagnoses were isolated branch retinal arterial occlusion (5/16), combined central retinal vein and cilioretinal artery occlusion (4/16), and isolated central retinal vein occlusion (4/16). All patients demonstrated hyperreflective plaque-like lesions at the level of the inner nuclear layer on spectral-domain OCT, with no fluorescein angiographic correlate. OCT angiography demonstrated variable areas of capillary dropout within the superficial and deep retinal capillary plexi in these areas. En face OCT highlighted confluent areas of middle retina hyperreflectivity corresponding to these lesions. Three distinct en face OCT patterns were observed: arteriolar, fern-like, and globular. Microperimetry demonstrated relative scotomas mapping to the area of middle retinal hyperreflectivity seen on en face OCT. CONCLUSIONS: Paracentral acute middle maculopathy may be best evaluated with the use of en face OCT imaging, which corresponds to subjective and objective visual field defects. En face OCT appearance may be used to classify paracentral acute maculopathy into distinct subtypes.

Emerging techniques for pathogen discovery in endophthalmitis.

PURPOSE OF REVIEW: Despite the inability to detect certain organisms and relatively low yield, microbial culture is the current gold standard for the diagnosis of most intraocular infections. Research on alternative molecular diagnostic methods has produced an array of strategies that augment and improve pathogen detection. This review summarizes the most recent literature on this topic. RECENT FINDINGS: The yield of traditional microbial culture has not improved since the Endophthalmitis Vitrectomy Study results were published 20 years ago. Advances in PCR methods have enabled quantification of pathogen load and screening for multiple organisms at once. More recently, deep sequencing techniques allow highly sensitive detection of any DNA-based life form in a specimen. This offers the promise of not only improved detection of traditional organisms but can also identify organisms not previously associated with endophthalmitis. SUMMARY: Molecular diagnostic methods enhance the results of microbial culture and may become the new standard in the diagnosis of intraocular infections.

Bilateral subinternal limiting membrane hemorrhage in benzene toxicity.

PURPOSE: To report the clinical and spectral domain optical coherence tomography findings in a patient with bilateral central vision loss and a history of exposure to polyamides. METHODS: The clinical presentation of the patient was documented with color fundus photographs and spectral domain optical coherence tomography. The patient was a 20-year-old male factory worker with no medical history who was initially admitted for workup of hematologic malignancy due to petechiae and fevers. RESULTS: Optical coherence tomography revealed bilateral hemorrhages in the subinternal limiting membrane space resembling Valsalva retinopathy. Complete blood count revealed pancytopenia and marked thrombocytopenia. CONCLUSION: Heavy exposure to benzene, a byproduct of the polyamide-curing process, is known to cause aplastic anemia. Accompanying thrombocytopenia may increase the risk of spontaneous subinternal limiting membrane hemorrhage.

Intracameral injection of tissue plasminogen activator to treat severe postoperative fibrinous reaction in iridocorneal endothelial syndrome.

Iridocorneal endothelial (ICE) syndrome is a primary endothelial abnormality that can cause a spectrum of iris changes, corneal edema, and glaucoma. Glaucoma secondary to ICE is difficult to manage because of the inflammatory reaction and fibrosis it can cause. We present a case of postoperative fibrinous reaction following endoscopic cyclophotocoagulation in ICE that caused aqueous tube shunt occlusion and high intraocular pressure. The condition was successfully managed with tissue plasminogen activator.