DESCRIPTIVE CLINICAL REPORTS
Treatment and long-term follow-up of distichiasis, with special reference to the Friesian horse: A case series
Article first published online: 6 NOV 2013
© 2013 EVJ Ltd
Equine Veterinary Journal
Volume 46, Issue 4, pages 458–462, July 2014
How to Cite
Hermans, H. and Ensink, J. M. (2014), Treatment and long-term follow-up of distichiasis, with special reference to the Friesian horse: A case series. Equine Veterinary Journal, 46: 458–462. doi: 10.1111/evj.12157
- Issue published online: 9 JUN 2014
- Article first published online: 6 NOV 2013
- Accepted manuscript online: 8 AUG 2013 09:43AM EST
- Manuscript Accepted: 25 JUL 2013
- Manuscript Received: 24 MAR 2013
- corneal ulceration;
Reasons for performing study
Distichiasis is very uncommon in horses and treatment options and outcome remain unknown.
To describe treatment and long-term follow-up of distichiasis in the horse.
Retrospective clinical study.
Case records of horses admitted for diagnosis and treatment of uni- or bilateral distichiasis between 2003 and 2012 were reviewed. Long-term (>6 months after last treatment) follow-up was by telephone conversation with the owner or referring veterinarian. Data were analysed using a Chi-squared test.
Eighteen cases were identified, of which 17 were Friesians. All horses had signs of corneal irritation or ulceration concurrent with distichiasis. In total, 29 eyes were affected with distichiasis of which 23 had clinical signs. All corneas were stained with fluorescein and 13 had fluorescein positive defects (45%). The lower eyelid was affected more often. Two different electrocautery devices were used for treatment. The complications were slight scarring of the eyelids (100%) and clinical recurrence (54%). Successful resolution of the clinical signs after one treatment occurred in 46% of the horses and in 77% of the horses satisfactory long-term results were found after a mean of 2 treatments (range: 1– 6 treatments). There was significant correlation between number of hairs and recurrence (P<0.002).
There is a breed predisposition of distichiasis in the Friesian horse. In Friesian horses that present with uni- or bilateral corneal irritation or corneal ulceration, careful examination of the eyelid margins should be performed to diagnose distichiasis. Electrocautery is a valid and successful therapeutic modality which is minimally invasive, inexpensive, has a low complication rate and is easy to perform in the standing sedated horse. The recurrence rate is low in horses with less than 5 distichiae.