How can a poor 10 year old boy treat fibromatosis that has paralysed him?
In general, yes. Depending on the type and intensity of light (i.e. wavelength), persistence of vision can be effected to varying degrees. Ultra Violet light would obviously be more detrimental to vision than ambient or “white” light, the effects in this case being caused by free radical production and subsequent shedding of outer discs of photoreceptors due to protein and lipid damage. Normal household light and sunlight can contain harmful UV rays, but even stimulation of photoreceptors by light within the visible spectrum can lead to progressive deterioration of vision. Photoreceptors, the cells that sense light, use pigments called rhodopsins that activate various rapid molecular signaling pathways to send information about light to the brain. It is believed that certain hereditary disorders resulting in progressive blindness by middle age are caused by genetic mutations that prevent photoreceptors from repairing damage incurred from normal light sources, whereas most healthy peopl
