A handbook of the diseases of the eye and their treatment / by Henry R. Swanzy.
- Swanzy, Henry R. (Henry Rosborough), Sir, 1844-1913.
- Date:
- 1897
Licence: Public Domain Mark
Credit: A handbook of the diseases of the eye and their treatment / by Henry R. Swanzy. Source: Wellcome Collection.
605/658 page 579
![CHAP. XIX.] THE OBSIT. 579 very rarely so, in protrusion of the globe from other causes But the sign is not so absolutely pathognomonic as it was held by von Graefe to be. It may be absent in Graves' Disease, although very rarely so, in the early stages, and it is sometimes present in other diseased states, and even in health. Stellwag's Sign is also very constant. It is incompleteness and diminished frequency of the act of involuntary nictitation This act occurs sometimes only once in a minute : or several rapid nictitations take place, and then a lengthened pause The nictitation each time is incomplete, the margins of the lid not being brought together. The result of this may be that the lower third of the cornea becomes covered with pannus vessels, owing to the constant exposure ■ for even during sleep the eyelids remain partially open. Dalrymple's Sign consists in an abnormal widening of the palpebral aperture, due to retraction of the upper eyelid It IS this gaping of the eyelids which gives the characteristic staring aspect to the patient. This sign is often erroneously attributed to Stellwag, or is included in his sign. The error due to the fact that in the same paper Mn which Stellwag hrst drew attention to what is above described as his sign he discussed this other previously observed sign. According theTaUe'- Dalrymple who first pointed out Probably each of these signs is due to the one cause sug- ges ed by Sharkey ^-namely, loss of power in the orbicular^ rather than over-action of the levator. ' Wienur Med. Jahriiicher. xvii vt 2^ isfio oITTi 71 ' - Ihe Lancet, May 26th, 18-19, p. 553. or^'siar.Evf^°r 'n^ r^''' ^'^''''''^ P^^^P^bral aperture, tL oTZ^o^ ' Tr~^^^ Orbital Tumour (mechanically). (2) Stimula byTa on:'2TL^^^^ Cocaine (in slight/egrL p^Zly y reason or ^—Jessop). (4) Women after childbirth rhvsterii^ Jr, ^ rcms. Ujjkth. boc., vol. xi., p. 204.](https://iiif.wellcomecollection.org/image/b20417536_0605.jp2/full/800%2C/0/default.jpg)
