A student in a class room can read text book but he can't able to see the letters on the black board distinctly write the name of his eye defects and what is the cause? suggest remedy
Answers
Answer: The eye defect of the student is near sightedness or scientifically called Myopia and the suggestive remedy to correct myopia is to either wear spectacles ie curved concave lensor contact lens ( also concave lens) or to correct it permanently by an eye surgery
Explanation: Basically what happens in near sightedness or myopia is that the eye muscles adjust themselves in such a position that they are only able to focus the eye lens ( which is a convex lens - i will not go into types of lenses) to see only the nearby objects and the muscles are not able to focus on the objects that are far away
so to correct this defect a concave lens is used which helps to focus the image of the object on the yellow spot of our eye ( which is the spot of best vision in humans )
or maybe a surgery which fixes the eye muscles permanently
hope it helps