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Introduction: A recent study suggested that non-O blood groups had an increased risk for the presence of retinal vein occlusion (RVO). In this study, we investigated (i) an association between blood group and the presence of RVO and (ii) whether this association correlated to other RVO risk factors. Methods: We included 485 RVO patients and 295 control subjects who were recruited in this case-control study. We determined ABO genotypes rs8176719 as a marker for the O allele and rs8176746 for the B allele by polymerase chain reaction. Results: We did not find an association between ABO blood group and the presence of RVO. In detail, the proportion of ABO blood groups was similar among RVO patients and control subjects (p = 0.527). In a logistic regression, non-O blood group was associated with 1.06-fold higher odds of being a RVO patient (95% CI: 0.78–1.45, p = 0.693), and this lack of association prevailed upon multivariable adjustment for age, gender, history of stroke and venous thromboembolism, and co-medication with lipid-lowering agents. Discussion: Although non-O blood groups are a known risk factor for thrombotic and cardiovascular disease, they do not seem to be a major risk factor for the development of RVO. [ABSTRACT FROM AUTHOR]

Purpose: Intraocular pressure is the main risk factor for glaucoma; however, additional risk factors may also matter. This systematic review and meta‐analysis were conducted to summarize the evidence regarding the association of cholesterol parameters (total cholesterol, low‐density lipoprotein (LDL) and high‐density lipoprotein (HDL) levels) and glaucoma. Methods: Four electronic databases were searched for all publications containing 'glaucoma' and one of various forms of 'cholesterol' or 'lipoprotein'. Two independent reviewers screened abstracts and potentially full texts of identified articles for eligibility. Risk of bias was assessed with the Newcastle–Ottawa Scale. A random‐effects meta‐analysis was used to investigate the differences in total cholesterol, LDL and HDL levels between patients with and without glaucoma. Results: Overall, 29 observational studies were included in the systematic review and 26 reported quantitative information to investigate differences in cholesterol parameters between patients with glaucoma (N = 7196) and patients without glaucoma (N = 350 441). Patients with glaucoma had significantly higher total cholesterol levels than patients without glaucoma (Mean Difference (MD) 7.9 mg/dl, 95% CI 3.3 to 12.5, p = 0.001) and lower mean HDL levels (MD −2.0 mg/dl, 95% CI: −3.1 to −0.9, p = 0.001). Patients with glaucoma had higher mean LDL levels than patients without glaucoma, albeit not statistically significant (MD 6.1 mg/dl, 95% CI: −4.3 to 16.4, p = 0.251). Conclusion: This systematic review and meta‐analysis of observational studies found an association of glaucoma and high total cholesterol and low HDL levels, respectively. Although this supports the hypothesis that lipid levels pose an additional risk for glaucoma development, heterogeneity was substantial and causality cannot be presumed from identified observational studies. [ABSTRACT FROM AUTHOR]

The article investigates the effect of the dexamethasone intravitreal injection on choroidal volume in eyes with diabetic macular oedema. Topics mentioned include the decline of mean choroidal volume following the dexamethasone intravitreal implant, the aspects which contribute to an increase in chroidal volume, and the unchange choroidal volume in the fellow eyes.