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If you can count, it's thanks to your pupils. The holes in the center of your eyes can detect quantity, new research finds. The mechanisms we use to sense quantity are located in our pupils. This is the result of a study conducted by the School of Psychology of the University of Sydney, in collaboration with the Universities of Pisa and Florence (Italy), just published in Nature Communications.


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New insight on how people with retinal degenerative disease can maintain their night vision for a relatively long period of time has been published today in the open-access eLife journal. The study suggests that second-order neurons in the retina, which relay visual signals to the retinal ganglion cells that project into the brain, maintain their activity in response to photoreceptor degeneration to resist visual decline -- a process known as homeostatic plasticity.


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When the eye isn't getting enough oxygen in the face of common conditions like premature birth or diabetes, it sets in motion a state of frenzied energy production that can ultimately result in blindness, and now scientists have identified new points where they may be able to calm the frenzy and instead enable recovery. In this high-energy environ, both the endothelial cells that will form new blood vessels in the retina -- which could improve oxygen levels -- and nearby microglia -- a type of macrophage that typically keeps watch over the retina -- prefer glycolysis as a means to turn glucose into their fuel.


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A new approach in ophthalmology that offers a revolutionary alternative to corneal transplantation has just been developed by researchers and clinicians in North America, Europe, and Oceania. The team was co-led by May Griffith, a researcher at Maisonneuve-Rosemont Hospital Research Centre, which is affiliated with Université de Montréal and is part of the CIUSSS de l'Est-de-l'Île-de-Montréal. The results of this multinational project have just been published in the journal Science Advances.


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February Is Age-Related Macular Degeneration (AMD) / Low-Vision Awareness Month What is Macular Degeneration? Age-Related Macular Degeneration (AMD) is a relatively common eye condition. It is the leading cause of vision loss in adults 55 and over. It affects more than 10 million Americans – more than both glaucoma and cataracts combined.


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