Vol. 10, Issue 1, Part E (2026)

Aim: To study the efficacy and clinical outcomes of Cryotherapy with medial canthoplasty in the management of pigmentary keratitis (PK) in pugs.

Place and Duration of Study: Department of Veterinary Surgery and Radiology, College of Veterinary Science, Guru Angad Dev Veterinary and Animal Sciences University, Ludhiana, Punjab, India during the year 2020-21.

Methodology: This study was conducted on six Pug breed of dogs (n=6 eyes) presented to the clinics with signs of reduced vision and difficulty in maneuverability. All the animals underwent a complete ophthalmic examination and were clinically diagnosed for Pigmentary Keratitis. Under general anaesthesia, Cryotherapy with medial canthoplasty was performed in all the cases and their clinical outcomes were assessed.

Results: The mean age of the study population was 6.33±0.93 years. All the animals were males with four animals belonging to adult category and two animals belonging to senile category. Medial Caruncular Trichiasis (MCT) and Medial Entropion of Lower Eyelid (MELE) was observed in all six animals and Keratoconjunctivitis sicca (KCS) was observed in three animals. The preoperative mean Schirmer’s tear test (STT) value, mean intraocular pressure (IOP) and mean pigmentation score was 12.67±4.02 mm/min, 19.33±2.09 mm Hg and 10.17±1.76. The menace response was positive in two animals and negative in four animals preoperatively. Cryotherapy with medial canthoplasty was performed in all the six animals and the postoperative mean pigmentation score on the 30^th postoperative day was 6.58±1.44. The menace response was positive in four animals on the 30^th postoperative day.

Conclusion: The early onset of favorable clinical outcomes such as improved vision and increased animal activity levels warrants the use of Cryotherapy with medial canthoplasty in the management of pigmentary keratitis in pugs in spite of the postoperative complications such as persistent pigmentation and recurrence of pigmentation.