| | ASTIGMATISM | Astigmatism is a vision condition that occurs when the front surface of the eye, i.e., the cornea, is slightly irregular in shape. This irregular shape prevents light from focusing properly on ... |
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| | | Hydrocarbons |  The study of elements and their compounds has been divided into two main branches of chemistry, Organic and inorganic chemistry. Organic chemistry was originally defined as t... |
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