| http://www.w3.org/ns/prov#value | - However, prolonged gazing at bright sources of light such as the sun can result in a loss of visual acuity through photochemical damage to the light-sensitive receptor cells in the retina.Doctors in India have transplanted light-sensitive cells from the eyes of 14-19 week-old healthy aborted foetuses into the eyes of blind adults suffering from Retinitis Pigmentosa.Both these morphological changes
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