The condition called macular degeneration involves decreased function of the macula of the retina. The effect of this condition on vision is that: there occurs a loss of the central part of the field of vision.
Macular degeneration is caused due to damage in the blood vessels that leak any fluid or blood into the macula of the retina. As a result central vision is lost as the condition worsens with time. In older people, the disease may also cause permanent blindness.
Retina is a layer of tissue at the back of the eye which is most light-sensitive. It receives the light of the image and send the signals to the brain. As a result, the image of the object is formed.
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Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. Most leaves have stomata, which open and close. They regulate carbon dioxide, oxygen, and water vapour exchange with the atmosphere.
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Just be yourself and u will be ideal
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en·do·sym·bi·o·sis
/ˌendōˌsimbēˈōsis,-ˌsimbī-/
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nounBIOLOGY
symbiosis in which one of the symbiotic organisms lives inside the other.
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