Refraction of the eye : its diagnosis and the correction of its errors with a chapter on keratoscopy / by A. Stanford Morton.

  • Morton, A. Stanford.
Date:
1882
Catalogue details

Licence: Public Domain Mark

Credit: Refraction of the eye : its diagnosis and the correction of its errors with a chapter on keratoscopy / by A. Stanford Morton. Source: Wellcome Collection.

    49/76 page 37
    (iii) The shadow travels along, and indicates the error of refraction in that meridian which is at right angles to the direction of its edge. (iv) If the shadow move with the mirror, the refraction • is myopic: and we order a lens 0*50 D. (J^) more concave than the weakest with which its movement ceases to be with the mirror. (v) If the shadow move against the mirror, we have a case ofE., H. oxweakyi; and the glass ordered is I D. less convex than that which reverses the movement. (vi) The feeller the luminous reflex, and the slower the movement of the shadow across the area of the pupil, the higher is the ametropia.
    digitised image 1
    digitised image 2
    digitised image 3