2020

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Tripathy K, Ying H, Maldonado Cerda A, Filipowicz A, Kaya M, Seymen Z, Anesi SD, Chang PY, Foster CS. Widefield Fundus Fluorescein Angiography Features of Uveitis Associated with Juvenile Idiopathic Arthritis. Ocul Immunol Inflamm 2020;:1-10.Abstract
PURPOSE: To evaluate the wide-field fundus fluorescein angiography (WFA) characteristics of uveitis associated with juvenile idiopathic arthritis (JIA-uveitis). METHODS: Retrospective review of records. WFA with Spectralis (Heidelberg) of JIA-uveitis patients were analyzed using the scoring system by Angiography Scoring for Uveitis Nomenclature. RESULTS: Thirty-seven eyes of 20 patients were studied. A total score of at least 1 was noted in 27 eyes (72.97%). WFA features included optic disc hyperfluorescence (51.35%), macular leakage (27.03%), retinal vascular staining/leakage at posterior pole (27.03%) and peripheral retina (64.86%), capillary leakage at the posterior pole (37.84%), and peripheral retina (59.46%). A decision to change the management plan was made in 8 of 9 patients with bilateral quiet anterior chambers after WFA results. CONCLUSION: More than 70% of JIA-uveitis eyes showed some WFA-evidence of posterior segment inflammation, which changed the course of therapy for a major proportion of patients with no clinically active anterior chamber inflammation.
Truong-Le M, Chwalisz B. Antibody Testing in Atypical Optic Neuritis. Semin Ophthalmol 2020;:1-9.Abstract
Optic neuritis (ON) is a common manifestation of central nervous system demyelinating disorders such as multiple sclerosis (MS). The last two decades have seen increasing recognition of atypical optic neuritis syndromes, driven in large part by characterization of demyelinating diseases associated with antibodies to aquaporin 4 (AQP4) and myelin oligodendrocyte glycoprotein (MOG). Given their increased importance in the workup of ON, familiarity with serological tests for ON has become essential for ophthalmologists. This review will discuss technological aspects, performance, and clinical implications of serological tests for atypical ON.
Tsubota K, Pflugfelder SC, Liu Z, Baudouin C, Kim HM, Messmer EM, Kruse F, Liang L, Carreno-Galeano JT, Rolando M, Yokoi N, Kinoshita S, Dana R. Defining Dry Eye from a Clinical Perspective. Int J Mol Sci 2020;21(23)Abstract
Over the past decades, the number of patients with dry eye disease (DED) has increased dramatically. The incidence of DED is higher in Asia than in Europe and North America, suggesting the involvement of cultural or racial factors in DED etiology. Although many definitions of DED have been used, discrepancies exist between the various definitions of dry eye disease (DED) used across the globe. This article presents a clinical consensus on the definition of DED, as formulated in four meetings with global DED experts. The proposed new definition is as follows: "Dry eye is a multifactorial disease characterized by a persistently unstable and/or deficient tear film (TF) causing discomfort and/or visual impairment, accompanied by variable degrees of ocular surface epitheliopathy, inflammation and neurosensory abnormalities." The key criteria for the diagnosis of DED are unstable TF, inflammation, ocular discomfort and visual impairment. This definition also recommends the assessment of ocular surface epitheliopathy and neurosensory abnormalities in each patient with suspected DED. It is easily applicable in clinical practice and should help practitioners diagnose DED consistently. This consensus definition of DED should also help to guide research and clinical trials that, to date, have been hampered by the lack of an established surrogate endpoint.
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Ung C, Gragoudas E. Checkpoint inhibitor-induced sarcoid choroidal granulomas. Am J Ophthalmol Case Rep 2020;18:100652.Abstract
Purpose: To present a novel case of sarcoid choroidal granulomas due to nivolumab therapy for metastatic cutaneous melanoma. Observations: A 55 year-old male with a history of stage III metastatic cutaneous melanoma treated by nivolumab presented with bilateral choroidal lesions. The ophthalmologic examination revealed bilateral creamy, yellow choroidal lesions with no ocular inflammation. The systemic workup revealed pulmonary sarcoidosis confirmed by biopsy. Conclusion: Nivolumab is an immune checkpoint inhibitor therapy used in the treatment of metastatic melanoma. With the increasing use of immune checkpoint inhibitors in patients with advanced melanoma, clinicians should be aware of this potential associated immune-related adverse event.
Ung L, Wang Y, Vangel M, Davies EC, Gardiner M, Bispo PJM, Gilmore MS, Chodosh J. Validation of a Comprehensive Clinical Algorithm for the Assessment and Treatment of Microbial Keratitis. Am J Ophthalmol 2020;214:97-109.Abstract
PURPOSE: To validate a comprehensive clinical algorithm for the assessment and treatment of microbial keratitis (MK). DESIGN: Retrospective cohort study. METHODS: The "1, 2, 3 Rule" for the initial management of MK was conceived by Vital and associates in 2007 to inform the decision as to when to perform corneal cultures. The rule is invoked when any 1 of 3 clinical parameters is met: ≥1+ anterior chamber cells, ≥2 mm infiltrate, or infiltrate ≤3 mm distance from the corneal center. When the rule is met, we added the mandatory use of fortified topical antibiotics after cultures are obtained. We compared outcomes of cases presenting to Massachusetts Eye and Ear 2 years before (Group I, n = 665) and after (Group II, n = 767) algorithm implementation. The primary composite outcome was a vision-threatening complication, such as corneal perforation. RESULTS: At a median follow-up of 67.0 and 60.0 days, respectively, 172 patients experienced a vision-threatening complication (Group I, 12.9% vs Group II, 11.2%, P = .51). While the algorithm codified conventional management practice at either end of disease severity, the effect of algorithm-augmented care was best appreciated in patients with lesions satisfying only 1 criterion. In this group, there was an increase in the proportion of patients undergoing culture at presentation (54.6% vs 67.7%, P = .006), fortified antibiotic prescription (29.7% vs 53.9%, P < .001), and reduction in vision-threatening complications (9.7% vs 1.8%, P = .001). The proportion of patients who were not cultured at presentation but later required culturing decreased (13.4% vs 5.1%, P = .001), as did patients who did not meet any criteria but were nonetheless cultured (23.9% vs 8.5%, P < .001). Multiple logistic regression showed that all algorithm parameters were independently associated with outcome: ≥1+ anterior chamber cells (odds ratio [OR] 1.66, 95% confidence interval 1.09-2.52); ≥2 mm infiltrate (OR 4.74, 2.68-8.40); and ≤3 mm from corneal center (OR 2.82, 1.85-4.31), confirmed with comparison to a bootstrapped sample (n = 10,000). CONCLUSIONS: The implementation of this algorithm reduced vision-threatening complications for patients with lesions satisfying only 1 criterion, arguably the most difficult patients in whom to judge disease severity. Implementation also led to a decrease in patients receiving unnecessary care.
Ung C, Stryjewski TP, Eliott D. Indications, Findings, and Outcomes of Pars Plana Vitrectomy after Open Globe Injury. Ophthalmol Retina 2020;4(2):216-223.Abstract
PURPOSE: To determine the indications, findings, and outcomes of patients with open globe injury (OGI) requiring pars plana vitrectomy (PPV). DESIGN: Retrospective, single-vitreoretinal surgeon case series. PARTICIPANTS: Sixty-one consecutive eyes with OGI that required PPV. METHODS: Retrospective chart review of consecutive patients who underwent PPV after OGI between March 1, 2011, and August 1, 2017, at Massachusetts Eye and Ear by 1 surgeon. MAIN OUTCOME MEASURES: Final visual acuity and rates of recurrent retinal detachment (RD) and proliferative vitreoretinopathy (PVR). RESULTS: Sixty-one eyes of 61 consecutive patients underwent PPV after sustaining OGI. Mean follow-up was 12.8±12.1 months (range, 0.5-65 months). At the time of presentation after OGI, 64% of eyes showed light perception or worse vision. The indications for PPV, which was performed on average of 15 days after injury, included RD without retinal incarceration (39%), RD with retinal incarceration in the scleral or corneal wound or both (13%), media opacity without RD (28%), vitreous traction without RD (11%), intraocular foreign body (5%), and endophthalmitis (3%). At the time of PPV, substantial comorbidities were noted, including corneal trauma (20%), hyphema (41%), iris trauma (62%), lens expulsion (54%), subretinal hemorrhage (51%), and choroidal hemorrhage (30%). Using multivariate analysis, factors associated with RD after initial PPV were preoperative subretinal hemorrhage (odds ratio [OR], 5.73; P = 0.03), PVR found at initial PPV (OR, 11.94; P = 0.021), and retinectomy (OR, 17.88; P = 0.003). No patients were inoperable, because all patients left the operating room with complete retinal reattachment. Of 35 eyes that showed RD, 19 (54%) redetached as a result of PVR. In 80% of eyes with RD at initial presentation (28/35 eyes), the retina remained completely attached at last follow-up, and 5 additional eyes remained partially attached (33/35 [94%]). Of 61 total eyes included in this study, 89% remained completely attached, and 42 (69%) achieved visual acuity of 20/200 or better at last follow-up. CONCLUSIONS: Despite substantial ocular comorbidities, PPV can result in retinal reattachment in even the most severe cases. Good visual outcomes can be achieved for most patients who undergo vitreoretinal surgery after open globe trauma.
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Valdes L, Bispo P, Sobrin L. Application of Metagenomic Sequencing in the Diagnosis of Infectious Uveitis. Semin Ophthalmol 2020;:1-4.Abstract
: to summarize the origin and very recent history of the use of metagenomic sequencing for the diagnosis of infectious uveitis, convey the technique as described by one of the primary institutions experimenting with the technology, and present recent successful applications of the technology as well as potential advantages and pitfalls compared to other current diagnostic tools.: review of peer-reviewed literature concerning metagenomic sequencing for the diagnosis of infectious uveitis.: compared to existing diagnostic methods, metagenomic deep sequencing is a sensitive, unbiased, and comprehensive technique with great potential for diagnosing the causative pathogens of cases of infectious uveitis. However, many issues remain to be addressed in the process of developing this technology, including but not limited to the potentially overwhelming amount of information generated, definition of diagnostic thresholds, demonstration of validity, contamination, and cost.
Valdes LM, Sobrin L. Uveitis Therapy: The Corticosteroid Options. Drugs 2020;80(8):765-773.Abstract
Uveitis is characterized by intraocular inflammation involving the uveal tract; its etiologies generally fall into two broad categories: autoimmune/inflammatory or infectious. Corticosteroids  are a powerful and important class of medications ubiquitous in the treatment of uveitis. They may be given systemically or locally, in the form of topical drops, periocular injection, intravitreal suspension, or intravitreal implant. This review describes each of the currently available corticosteroid treatment options for uveitis, including favorable and unfavorable characteristics of each as well as applicable clinical trials. The main advantage of corticosteroids as a whole is their ability to quickly and effectively control inflammation early on in the course of uveitis. However, they can have serious side effects, whether localized to the eye (such as cataract and elevated intraocular pressure) or systemic (such as osteonecrosis and adrenal insufficiency) and in the majority of cases of uveitis are not an appropriate option for long-term therapy.
Vandenberghe LH. COVID-19: Gene Transfer to the Rescue?. Hum Gene Ther 2020;31(11-12):605-607.
VanderVeen DK, Drews-Botsch CD, Nizam A, Bothun ED, Wilson LB, Wilson EM, Lambert SR, Lambert SR. Outcomes of Secondary Intraocular Lens Implantation in the Infant Aphakia Treatment Study. J Cataract Refract Surg 2020;Abstract
PURPOSE: To report outcomes of secondary intraocular lens (IOL) implantation in the Infant Aphakia Treatment Study (IATS) SETTING:: Multicenter clinical practice DESIGN:: Secondary analysis of patients enrolled in a randomized clinical trial METHODS:: Details regarding all secondary IOL surgeries conducted in children enrolled in the IATS were compiled. We evaluated visual outcomes, refractive outcomes, and adverse events at age 10 ½ years. Comparisons were made to eyes that remained aphakic and to eyes randomized to primary IOL placement. RESULTS: 55/57 patients randomized to aphakia with contact lens correction were seen for the 10 ½ year study visit; 24/55 eyes (44%) had secondary IOL surgery. Median age at IOL surgery was 5.4 years (range 1.7 to 10.3 years). Mean absolute prediction error was 1.0 ± 0.7D. At age 10 ½ years, the median log MAR VA was 0.9 (range 0.2 to 1.7), similar to VA in the 31 eyes still aphakic (0.8, range 0.1 to 2.9); the number of eyes with stable or improved VA scores between the 4 ½ and 10 ½ year study visits was also similar (78% secondary IOL eyes, 84% aphakic eyes). For eyes undergoing IOL implantation after the 4.5 year study visit (n=22), the mean refraction at age 10 ½ years was -3.2 ±2.7D (range -9.9D to 1.1D), compared to -5.5 ±6.6 D (n=53, range -26.5 to 3.0D) in eyes with primary IOL (p=0.03). CONCLUSIONS: Delayed IOL implantation allows a more predictable refractive outcome at age 10 ½ years, though the range of refractive error is still large.
Vasilikos I, Haas J, Teixeira GQ, Nothelfer J, Neidlinger-Wilke C, Wilke H-J, Seitz A, Vavvas DG, Zentner J, Beck J, Hubbe U, Mizaikoff B. Infrared attenuated total reflection spectroscopic surface analysis of bovine-tail intervertebral discs after UV-light-activated riboflavin-induced collagen crosslinking. J Biophotonics 2020;:e202000110.Abstract
The tensile strength of the intervertebral disc (IVD) is mainly maintained by collagen cross-links. Loss of collagen cross-linking combined with other age-related degenerative processes contributes to tissue weakening, biomechanical failure, disc herniation and pain. Exogenous collagen cross-linking has been identified as an effective therapeutic approach for restoring IVD tensile strength. The current state-of-the-art method to assess the extent of collagen cross-linking in tissues requires destructive procedures and high-performance liquid chromatography (HPLC). In this study, we investigated the utility of infrared attenuated total reflection (IR-ATR) spectroscopy as a non-destructive analytical strategy to rapidly evaluate the extent of UV-light-activated riboflavin (B2)-induced collagen crosslinking (UVA-CXL) in bovine IVD samples. Thirty five fresh bovine-tail IVD samples were equally divided into five treatment groups: (i) untreated, (ii) cell culture medium DMEM only, (iii) B2 only, (iv) UV-light only, and (v) UV-light-B2. A total of 674 measurements have been acquired, and were analyzed via partial least squares discriminant analysis. This classification scheme unambiguously identified individual classes with a sensitivity >91% and specificity >92%. The obtained results demonstrate that IR-ATR spectroscopy reliably differentiates between different treatment categories, and promises an excellent tool for potential in vivo, non-destructive, and real-time assessment of exogenous IVD crosslinking. This article is protected by copyright. All rights reserved.
Vavvas DG, Sarraf D, Sadda SR, Eliott D, Ehlers JP, Waheed NK, Morizane Y, Sakamoto T, Tsilimbaris M, Miller JB. Concerns about the interpretation of OCT and fundus findings in COVID-19 patients in recent Lancet publication. Eye (Lond) 2020;34(12):2153-2154.
Venkateswaran N, Klavdianou O, Kondylis G, Kosmidis I, Palioura S. Paraneoplastic Pemphigus Associated with Bilateral Corneal Perforations in Follicular Dendritic Cell Sarcoma. Ocul Immunol Inflamm 2020;:1-3.Abstract
PURPOSE: To describe a case of paraneoplastic pemphigus (PNP) presenting as spontaneous bilateral corneal perforations in a patient with follicular dendritic cell sarcoma. METHODS: Retrospective chart review Results: A 73-year-old Greek woman with a history of follicular dendritic cell sarcoma (FDCS) presented with bilateral corneal perforations and a cicatrizing conjunctivitis. Her diagnosis was consistent with PNP with corneal and conjunctival involvement after a change in her chemotherapy regimen from intravenous cyclophosphamide to gemcitabine. She was treated with a multilayered amniotic membrane in the right eye and cyanoacrylate glue in the left eye. Systemic intravenous cyclophosphamide and oral prednisone were re-started. Both perforations healed but the patient passed away soon after precluding further follow-up. CONCLUSIONS: Ocular manifestations of PNP can rarely present with spontaneous corneal perforations. This is the first case of FDCS-associated PNP with corneal involvement. Such cases should be diagnosed expediently and managed with aggressive systemic immunosuppressive therapy.
Venkatraman P, Mills-Henry I, Padmanabhan KR, Pascuzzi P, Hassan M, Zhang J, Zhang X, Ma P, Pang CP, Dowling JE, Zhang M, Leung YF. Rods Contribute to Visual Behavior in Larval Zebrafish. Invest Ophthalmol Vis Sci 2020;61(12):11.Abstract
Purpose: Although zebrafish rods begin to develop as early as 2 days postfertilization (dpf), they are not deemed anatomically mature and functional until 15 to 21 dpf. A recent study detected a small electroretinogram (ERG) from rods in a cone mutant called no optokinetic response f (nof) at 5 dpf, suggesting that young rods are functional. Whether they can mediate behavioral responses in larvae is unknown. Methods: We first confirmed rod function by measuring nof ERGs under photopic and scotopic illumination at 6 dpf. We evaluated the role of rods in visual behaviors using two different assays: the visual-motor response (VMR) and optokinetic response (OKR). We measured responses from wild-type (WT) larvae and nof mutants under photopic and scotopic illuminations at 6 dpf. Results: Nof mutants lacked a photopic ERG. However, after prolonged dark adaptation, they displayed scotopic ERGs. Compared with WT larvae, the nof mutants displayed reduced VMRs. The VMR difference during light onset gradually diminished with decreased illumination and became nearly identical at lower light intensities. Additionally, light-adapted nof mutants did not display an OKR, whereas dark-adapted nof mutants displayed scotopic OKRs. Conclusions: Because the nof mutants lacked a photopic ERG but displayed scotopic ERGs after dark adaptation, the mutants clearly had functional rods. WT larvae and the nof mutants displayed comparable scotopic light-On VMRs and scotopic OKRs after dark adaptation, suggesting that these responses were driven primarily by rods. Together, these observations indicate that rods contribute to zebrafish visual behaviors as early as 6 dpf.
Veronese C, Maiolo C, Armstrong GW, Primavera L, Torrazza C, Della Mora L, Ciardella AP. New surgical approach for sutureless scleral fixation. Eur J Ophthalmol 2020;30(3):612-615.Abstract
PURPOSE: The aim of this article is to describe a novel surgical technique for sutureless scleral fixation of an intraocular lens using the newly developed FIL SSF Carlevale IOL (Soleko, Italy). METHODS: Four eyes of four patients with poor capsular support were recruited to our study, three resulting from intraocular lens subluxation and one case resulting from traumatic cataract. A novel sutureless sclera-fixated intraocular lens was implanted into the posterior chamber of each eye with sclerocorneal plugs fixating the lens to the wall of the eye. RESULTS: Mean age of patients was 52 ± 16 years, ranging from 35 to 70 years. Mean follow-up was 6.50 ± 1.29 months (range: 5-7 months). Mean preoperative best-corrected visual acuity was 0.50 ± 0.33 logMAR (range: 1-0.3 logMAR). Postoperative best-corrected visual acuity improved to 0.08 ± 0.08 logMAR (range: 0.2-0 logMAR). There was no significant change in the mean intraocular pressure and there were no postoperative complications, such as iatrogenic distortion or breakage of the intraocular lens haptic, intraocular lens decentration, endophthalmitis, or retinal detachment. DISCUSSION: To the best of our knowledge, this is the first report of outcomes using the novel sutureless sclera-fixated FIL SSF Carlevale IOL. This new surgical technique offers a simplified and effective approach for sutureless scleral intraocular lens fixation with good refractive outcomes.
Veronese C, Pellegrini M, Maiolo C, Morara M, Armstrong GW, Ciardella AP. Multimodal ophthalmic imaging of staphylococcus aureus bacteremia associated with chorioretinitis, endocarditis, and multifocal brain abscesses. Am J Ophthalmol Case Rep 2020;17:100577.Abstract
Purpose: bacteriemia (SAB) as critical condition for the life and occasionally involves the eyes. The aim of this report is to describe the ocular involvement with multimodal imaging. Observations: A patient admitted for evaluation of acute onset of confusion, disorientation, and generalized malaise and found to have methicillin-resistant staphylococcus aureus (MRSA)-associated endocarditis and multifocal brain abscesses was evaluated by the ophthalmology service. The patient's visual acuity was 20/20 OU without relative afferent pupillary defect and normal intraocular pressures. Bedside anterior segment examination was normal. Posterior segment examination revealed intraretinal hemorrhages and Roth spots in the posterior pole of the right eye, and two deep well-defined focal white chorioretinal infiltrates and a hemorrhagic pigment epithelium detachment in the temporal quadrant of the left eye. Multimodal imaging was utilized to document these findings and ensure adequate antibiotic therapy. Conclusion: SAB has the potential for poor visual outcomes as well as significant morbidity and mortality. Multimodal imaging of SAB-related chorioretinitis allows for accurate diagnosis as well as assessment of response to antimicrobial therapy.
Vira J, Marchese A, Singh RB, Agarwal A. Swept-source optical coherence tomography imaging of the retinochoroid and beyond. Expert Rev Med Devices 2020;17(5):413-426.Abstract
: Swept-source optical coherence tomography (SS-OCT) imaging has ushered in an era of rapid and high-resolution imaging of the retinochoroid that provides detailed patho-anatomy of various layers.: In this detailed review, the technology of swept-source imaging including its principles and working has been discussed. The applications of SS-OCT in various conditions including age-related macular degeneration, diabetic retinopathy, pachychoroid spectrum of diseases, and inflammatory vitreoretinal conditions have been elaborated. For each disease, a brief review of literature along with the utility of SS-OCT and optical coherence tomography angiography has been provided with supporting figures. The advantages of SS-OCT over spectral-domain have been discussed if there is sufficient evidence in the literature. Finally, the review summarizes the technological advantages in this field of retinal imaging.: The introduction of SS-OCT in our clinics has added newer devices in our armamentarium that can provide high-quality images of the deep retina and choroid. These advances in medical devices can help in improving our knowledge relating to the pathophysiology of diseases and their evolution. In the near future, rapid and high-resolution imaging may provide real-time volumetric information of the whole retina and the choroid that can be readily used for patient care.
Vongsachang H, Friedman DS, Inns A, Kretz AM, Mukherjee MR, Callan J, Wahl M, Repka MX, Collins ME. Parent and Teacher Perspectives on Factors Decreasing Participation in School-Based Vision Programs. Ophthalmic Epidemiol 2020;27(3):226-236.Abstract
: To examine factors decreasing participation in school-based vision programs from parent and teacher perspectives.: We conducted 41 semi-structured focus groups (20 parent groups, 21 teacher/staff groups), at 10 Baltimore and 11 Chicago public elementary and middle schools offering school-based vision programs. School-based vision programs provided vision screening, eye exams, and eyeglasses if needed. Focus groups ranged in size from 2-9 participants (median = 5). Sessions were recorded, transcribed, and coded through an iterative process to develop themes using inductive analysis.: Ninety parents and 117 teachers/staff participated. Participants identified five major factors decreasing participation in school-based vision programs: (1) challenges with the consent form, including distribution, collection, and literacy and language barriers; (2) having existing eye care; (3) misunderstandings about the program, especially related to cost and insurance; (4) difficulty raising parental awareness of the program; and (5) certain attitudes towards vision, eye care, and school-based programs, including low prioritization of eye care, mistrust of the program, fear of sharing private information, not believing their child needs glasses, and reluctance accepting 'subsidized' services.: Parents and teachers identified important structural barriers to participation (i.e., consent form challenges and low parental awareness) and specific reasons for non-participation (i.e., attitudes, misunderstanding of the program, existing eye care) in school-based vision programs. Effective strategies are needed to facilitate return of consent forms and promote awareness of school-based vision programs among parents. Programs should also target services towards those currently without access to eye care and increase awareness about paediatric vision needs.
Vu THK, Chen H, Pan L, Cho K-S, Doesburg D, Thee EF, Wu N, Arlotti E, Jager MJ, Chen DF. CD4 T-Cell Responses Mediate Progressive Neurodegeneration in Experimental Ischemic Retinopathy. Am J Pathol 2020;190(8):1723-1734.Abstract
Retinal ischemic events, which result from occlusion of the ocular vasculature share similar causes as those for central nervous system stroke and are among the most common cause of acute and irreversible vision loss in elderly patients. Currently, there is no established treatment, and the condition often leaves patients with seriously impaired vision or blindness. The immune system, particularly T-cell-mediated responses, is thought to be intricately involved, but the exact roles remain elusive. We found that acute ischemia-reperfusion injury to the retina induced a prolonged phase of retinal ganglion cell loss that continued to progress during 8 weeks after the procedure. This phase was accompanied by microglial activation and CD4 T-cell infiltration into the retina. Adoptive transfer of CD4 T cells isolated from diseased mice exacerbated retinal ganglion cell loss in mice with retinal reperfusion damage. On the other hand, T-cell deficiency or administration of T-cell or interferon-γ-neutralizing antibody attenuated retinal ganglion cell degeneration and retinal function loss after injury. These findings demonstrate a crucial role for T-cell-mediated responses in the pathogenesis of neural ischemia. These findings point to novel therapeutic targets of limiting or preventing neuron and function loss for currently untreatable conditions of optic neuropathy and/or central nervous system ischemic stroke.
Vujosevic S, Aldington SJ, Silva P, Hernández C, Scanlon P, Peto T, Simó R. Screening for diabetic retinopathy: new perspectives and challenges. Lancet Diabetes Endocrinol 2020;8(4):337-347.Abstract
Although the prevalence of all stages of diabetic retinopathy has been declining since 1980 in populations with improved diabetes control, the crude prevalence of visual impairment and blindness caused by diabetic retinopathy worldwide increased between 1990 and 2015, largely because of the increasing prevalence of type 2 diabetes, particularly in low-income and middle-income countries. Screening for diabetic retinopathy is essential to detect referable cases that need timely full ophthalmic examination and treatment to avoid permanent visual loss. In the past few years, personalised screening intervals that take into account several risk factors have been proposed, with good cost-effectiveness ratios. However, resources for nationwide screening programmes are scarce in many countries. New technologies, such as scanning confocal ophthalmology with ultrawide field imaging and handheld mobile devices, teleophthalmology for remote grading, and artificial intelligence for automated detection and classification of diabetic retinopathy, are changing screening strategies and improving cost-effectiveness. Additionally, emerging evidence suggests that retinal imaging could be useful for identifying individuals at risk of cardiovascular disease or cognitive impairment, which could expand the role of diabetic retinopathy screening beyond the prevention of sight-threatening disease.

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