On the nature, and cure of strabismus : by operation / by J.A. Ratton.
- Ratton, James Alban, 1814-1865.
- Date:
- 1842
Licence: Public Domain Mark
Credit: On the nature, and cure of strabismus : by operation / by J.A. Ratton. Source: Wellcome Collection.
Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.
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![(Strabismus Convergens) or outwards, (Strabismus Divergens) or upwards, (Sursum Vergens,) or the axis of one eye may be directed upwardsand that of the other downwards, (Deorsum Vergens or Strabismus Ilor- rendus) ; and these occur in frequency as they are here relatively named. The first, with its varieties, most frequently, and the last happily, is of very rare occurrence. Again, distinct from these various forms]of Stra- bismus is JLuscitas, or a permanent stationary squint ot one eye—both are equally characterized by a loss of the natural correspondence of the optic axes ; but in the former this is owing to a want of harmony in the motions of the two eyes, whilst in the latter it is owing to the eye being fixed, more or less immovea- bly in one direction. In pure Strabismus there is not a loss of motive power, but the distorted eye becomes straight, and is capable of being directed to any object when the other is closed. In Luscitas, on the con- trary, the affected eye cannot, under any circumstan- ces, be turned right; hence to this latter affection may perhaps more properly be applied, the term of “ the club-foot of the eye,” for to Strabismus itself viewed under all its varieties (with a few exceptions) it can scarcely be said to bear much analogy ; for as we have seen, it is rarely owing to a permanent muscular con- traction ; but would appear to be dependant solely upon a physiological action of, or a habit of contraction in certain muscles,an opinion which is confirmed bythein- stantaneous return of the eye to its proper situation and movements, in most cases, as soon as the sound eye is covered. From this it would result, that, although it was the success of tenotomy in the contraction of](https://iiif.wellcomecollection.org/image/b22336813_0032.jp2/full/800%2C/0/default.jpg)
