The Total solution for NCERT class 6-12
Doesshort-sightedness (myopia) or long-sightedness (hypermetropia) implynecessarily that the eye has partially lost its ability of accommodation? Ifnot, what might cause these defects of vision?
Amyopic or hypermetropic person can also possess the normal ability ofaccommodation of the eye-lens. Myopia occurs when the eye-balls get elongatedfrom front to back. Hypermetropia occurs when the eye-balls get shortened. Whenthe eye-lens loses its ability of accommodation, the defect is calledpresbyopia.