Coloboma of the choroid and optic nerve sheath / by Arthur H. Benson.

  • Benson, Arthur H.
Date:
1882
Catalogue details

Licence: Public Domain Mark

Credit: Coloboma of the choroid and optic nerve sheath / by Arthur H. Benson. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

    10/19
    OF THE CHORIOID AND OPTIC NERVE SHEATH/ The cases of maldevelopment of tlie internal tunics of the eye wliicli I have the honour of exhibiting to tlie Medical Society are of interest, not alone from their extreme rarity, but also from an embryological and practical point of view. All maldevelopments or arrests of development help to teach us the mode of development, or at least serve as useful means of correcting theories and conclusions otherwise deduced. To tlie practical physician also it is of importance to remember that sucli malformations do occur, in order that he may not mistake them for the effects of disease, and perhaps suggest treatment which must fail to benefit. Both cases were discovered whilst assisting my friend, Dr. Fox, of Philadelphia, to examine, for statistical purposes, the eyes of the deaf-mutes in the institutions about Dublin. Both are deaf and dumb—the boy being an inmate of St. Joseph's Male Asylum at Cabra, and the girl of St. Mary's Asylum, also near Cabra. Neither was known to liaA^e anything amiss with the eyes until we discovered the colobomata. The following are the notes of the cases:— Cask I.—J. IT., aged tliirtcen, otlierwisc fairly well flevelopcd and intelligent, was admitted into St. Mark's Hospital in October last. There is nothing remarkable about the external appearance of the eyes; in both the iris is normal in shape, and acts well to light and accommo- dation. The tension also is normal, and tlie lens is clear. On examining with the ophthalmoscope the media arc found to be perfectly transparent, the disc is normal in shape and colour, with considerable pigmentation Bead before the Medical Society of the King and Queen's College of Physicians, Wednesday, February 1, 1SS2.