An impartial inquiry into the seat of the immediate organ of sight. Viz. whether the retina or choroïdes. Being the subject of a lecture, in a course lately given on the nature and cure of the diseases of the eye ... / [John Taylor].

  • Taylor, John, 1703-1772
Date:
1743
Catalogue details

Licence: Public Domain Mark

Credit: An impartial inquiry into the seat of the immediate organ of sight. Viz. whether the retina or choroïdes. Being the subject of a lecture, in a course lately given on the nature and cure of the diseases of the eye ... / [John Taylor]. Source: Wellcome Collection.

    14/64 (page 6)
    Necefli ty of Communica¬ tion between tlie immediate Organ of Sight, and erves that move the Pu¬ pil, further deinonhrated. (6) ' which are continued from the CboroiJeSy znd enter the Iris, are fufficient to occafion thefe regular Movements of the Pupil; it is not eafy to conceive why they cannot be equally fufficient for Vifion.—That thefe Changes of the Pupil in a healthful Eye i and Lofs, or defedt in its Movements^ arei owing to the Nerves of the Choroides and! thofe of the Iris being one and the fame Nerves, is evident^ and what farther con-1 firms this, is, that in, thofe Difeafes where: the Iris adheres in part to the Cornea, that] Part which is free, however fmall, hasi Tome Movement in thedifferent Degrees of Light, when the Sight is not loft ; and on: the contrary, when the Sight is loft, ital-j ways remains without any vifible Move-*^^ ment. Other Arguments maybe drawn, eadii of which would be a Demonftration of the! Neceffity of a Communication between thct immediate Organ of Sight, and thofe Nerves tha,t give Movement to the Iris ; Such as, that painful Senfation which arifes from, Light in fome of its Difeafes, by which we | find, that the Pupil is always much more contradled than we obferve it to be in a healthful Eye in the fame Degrees of Light % and that in Proportion to this Pain, the ,.4. * Contradfion is greater, and that in fuch Ca-* fes, the Patient has no Power to dilate the Pupil in any Degree of Light, lefs than the ordinary.