Vetnuus | December 2025 43 Transplantation of equine amniotic membrane results in good corneal transparency 12–20 weeks postoperatively following regression of secondary granulation tissue. All these procedures require good magnification and involve microsurgical techniques and equipment, and should probably be reserved for the referral situation. In one study, the presence of residual pigmentation following keratectomy is thought to increase the risk of sequestrum recurrence, with a 38% recurrence following incomplete keratectomy. It is for this reason that it is preferred that a keratectomy surgery be considered earlier rather than later, as the lesion is generally more superficial in the cornea, and a clearer keratectomy can be achieved. One also needs to be cautioned against transection of conjunctival pedicles in grafted eyes, as corneal abscess or recurrence of sequestration seems to be more common. In conclusion, affected cats should be examined carefully to ensure no mechanical irritation, and if so, this should be corrected as part of the sequestrum treatment. The treatment plan should be discussed carefully with the owner, and if surgery is going to be performed, then success rates are higher if a keratectomy can be performed on a small or superficial sequestrum versus managing a deep-seated sequestrum complicated by deep neovascularisation and malacia of the cornea. Regulars I Ophthalmology Column A small superficial sequestrum that has a high surgical success rate following superficial keratectomy Lamella Keratectomy 1 2 Keratectomy and conjunctival pedicle graft 3 Keratectomy and clear corneal translocation [CCT] Keratectomy and amniotic graft. Completely visual eye after 3 months 4 Even after multiple keratectomies, residual pigment may still be present in deep-seated lesions
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