Answer:
concave
Explanation:
Nearsightedness can be corrected with glasses and contact lenses or with laser surgery. The lenses used for correcting myopia are known as concave lenses and they have diopters (units in which the optical power of a lens or an optical mirror is measured) with minus numbers: -1, -2 etc. The further from the retina the image is formed, the bigger the lens’ curve has to be to correct the vision.
