This section is from the book "Sporting Dogs. Their Points And Management In Health, And Disease", by Frank Townend Barton. Also available from Amazon: Sporting Dogs; Their Points and Management in Health and Disease.
In this diseased condition it is generally the upper eyelid that is turned inwards. If the eyelashes grow inwards, it is called Trichiasis. In both conditions it follows that the lashes must be in contact with the globe of the eye.
If only a few lashes are growing inwards, they should be pulled out, but, if numerous, this is not a good plan. To cure it, a surgical operation is necessary.
Like inverted or turned-in eyelid, everted, or turned-out eyelid is not a diseased condition, but the outcome of disease, probably of a weak orbicular muscle.
It is the lower eye that is usually affected, and is curable by operation only.