A myopic eye can be corrected by:

1. In myopia distant rays focus before the retina. 2. A concave (diverging) lens spreads rays apart slightly before they enter. 3. The eye then focuses these less convergent rays onto the retina. 4. The required power is negative. 5. So a concave lens of suitable focal length corrects myopia. _Source: syllabus Science Ch 11 'Human Eye and the Colourful World'_