Have gender and ethnic disparities in ophthalmology disappeared? Insights from a workforce-based study in Israel (2006-2021).

Background: Workforce diversity in healthcare has been shown to improve the quality of patient care. A paucity of data exists globally on this subject in ophthalmology. The purpose of this study was to analyze nationwide trends in gender-, ethnic- and country of graduation disparities among ophthalmologists in Israel.

The lack of floater perception in eyes with asteroid hyalosis and its direct implications on laser vitreolysis.

Purpose: To present a novel optical model explaining why the vast majority of patients with Asteroid Hyalosis (AH) do not perceive any floaters. This changes our understanding of floater perception and undermines the operation mode of YAG laser vitreolysis.

Methods: Relying on a previously published model of floater perception based on astronomical equations of a solar eclipse, and on ultrasound images of the vitreous in three eyes with AH, we explain why such patients do not perceive floaters in spite of opaque bodies filling their entire vitreous, to the point of, in severe cases of AH, obscuring the fundus view during ophthalmoscopy.

How Does Nature Exposure Affect Adults With Symptoms of Mental Illness? A Meta-Analysis.

Existing research on the effects of nature exposure on the mental health of adults indicates that spending time in nature reduces depressive symptoms and stress, increases quality of life and mood and improves mental health. This meta-analysis aimed to answer the question: what are the effects of nature exposure on the social, mental and physical health of adults with symptoms of mental illness? The meta-analysis included all studies relevant to the study research questions which collected quantitative data on nature exposure using validated instruments for at least two time points on each participant and which were published between 1990 and 2020. Regarding the impact of nature exposure on adults with symptoms of mental illness, analyses showed significant, moderate effect sizes for all studies and smaller, but significant, effect sizes for studies with control groups Analyses also yielded critical information regarding the effect size of the type of nature dosage, nature setting, nature-based activity, key mental health outcomes and other factors.

Phase Transition to Chaos in Complex Ecosystems with Nonreciprocal Species-Resource Interactions.

Nonreciprocal interactions between microscopic constituents can profoundly shape the large-scale properties of complex systems. Here, we investigate the effects of nonreciprocity in the context of theoretical ecology by analyzing a generalization of MacArthur's consumer-resource model with asymmetric interactions between species and resources. Using a mixture of analytic cavity calculations and numerical simulations, we show that such ecosystems generically undergo a phase transition to chaotic dynamics as the amount of nonreciprocity is increased.

Phase transition to chaos in complex ecosystems with non-reciprocal species-resource interactions.

Non-reciprocal interactions between microscopic constituents can profoundly shape the large-scale properties of complex systems. Here, we investigate the effects of non-reciprocity in the context of theoretical ecology by analyzing a generalization of MacArthur's consumer-resource model with asymmetric interactions between species and resources. Using a mixture of analytic cavity calculations and numerical simulations, we show that such ecosystems generically undergo a phase transition to chaotic dynamics as the amount of non-reciprocity is increased.