Myopia generally occurs in the young and patient experiences difficulty in seeing objects at a distance. This is because of the parallel rays transmitted by the objects, focusing in front of the retina. This may be due to light rays to focus at a point in front of retina, rather than directly on its surface. Myopia (Nearsightedness) also can be caused by the cornea or lens or both being too curved for the length of the eyeball.
Myopia begins in childhood and you may have a higher risk if your parents are nearsightedness. Normally after the use of spectacles with concave lens of appropriate curvature, the patient is relieved of the trouble. But should continue to use the spectacles. Mostly nearsightedness stabilized in early adulthood but sometimes it continues to progress with age. This is called Progressive myopia and the patient goes on changing his lens for higher numbers. In Ayurveda this is called drishti dosha.
Amalaki, punaranava, yashtimadhu, triphala are useful in myopia.