Defective vision : its cause and cure / by F.J. Bluett.

  • Bluett, F. J. (Frederic J.)
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: Defective vision : its cause and cure / by F.J. Bluett. Source: Wellcome Collection.

    26/100 (page 22)
    MYOPIA OR SHORTSIGHT, This defect is exactly the reverse of Hypermetropia, the eye being too long from back to front, and the Crystalluie Lens. Retina. Fig. 4.—Existing Myopia. Crystalline Lens. Fig. 5.—Corrected Myopia. rays are thrown short of the retina, and require concave lenses to diverge them, and so send the rays .farther back on to the retina.