A student has difficulty reading the black board while sitting in the last row.what is the defect of vision? How can it be corrected?
Myopia is also known as near-sightedness. A person with myopia can see nearby objects clearly but cannot see distant objects distinctly. A person with this defect has the far point nearer than infinity. Such a person may see clearly upto a distance of a few meters. This defect can be corrected by using a concave lens of suitable power.