retinal photoreceptors

At What Age Does Retinitis Pigmentosa Occur?

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At What Age Does Retinitis Pigmentosa Occur? RP is typically diagnosed in young adulthood, but the age of onset may range from early childhood to the mid 30s to 50s. Photoreceptor degeneration has been detected as early as age of six years even in patients who remain asymptomatic until young adulthood. Does everyone with retinitis

What Are On Center Off Surround Cells?

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What Are On Center Off Surround Cells? ON center/OFF surround cell: Flashing small bright spot in the center subregion increases the cell’s response. Flashing a bright annulus in the surround subregion inhibits the cell’s response. … It gets inhibition from a small spot of light in the center, and excitation from an annulus in the