Optical coherence tomographic evaluation of deep corneal ulcers healing treated by corneo-conjunctival transposition graft and conjunctival bridge graft in dogs

Abstract

Twelve dogs with deep corneal ulcers were treated using corneoconjunctival transposition (CCT) grafting in six dogs and conjunctival bridge grafting in the remaining six. CCT grafting demonstrated a significantly shorter surgical duration compared to conjunctival bridge grafting. Comprehensive pre- and postoperative assessments, including ophthalmic, neuro-ophthalmic, and behavioural vision evaluations, were conducted over a 120-day period. Dogs that underwent CCT grafting exhibited a more rapid restoration of vision, attaining near corneal transparency by day 90, whereas those treated with conjunctival bridge grafting achieved similar transparency by day 120. Optical coherence tomography (OCT) confirmed excellent corneal healing and graft integration in both groups. A single case of graft dehiscence was observed on postoperative day 5 in the conjunctival bridge graft group. In conclusion, CCT grafting emerged as the superior approach, offering expedited corneal transparency, enhanced visual recovery, and a reduced surgical duration compared to conjunctival bridge grafting.