Two Cases of Fibrin Membrane-Induced Pupillary Block Treated With Neodymium-Doped Yttrium Aluminium Garnet (Nd:YAG) Laser After Cataract Surgery in Dogs.

BACKGROUND

Fibrin membrane-induced pupillary block (FMPB) and subsequent glaucoma are rare complications in humans after intraocular surgery, typically managed with neodymium-doped yttrium aluminium garnet (Nd:YAG) laser iridotomy. While this condition is infrequently reported in dogs, it can occur after cataract surgery, with existing treatments being more invasive and less established than in humans.

OBJECTIVE

To evaluate the feasibility and clinical outcomes of Nd:YAG laser membranotomy as a treatment for FMPB in dogs.

METHODS

Two dogs presenting with post-cataract surgery complications, including FMPB and iris bombé, underwent Nd:YAG laser membranotomy. Treatment included preoperative anti-inflammatory and anti-glaucoma therapy, followed by laser procedures targeting fibrin membranes.

RESULTS

Both cases showed immediate relief of pupillary block and reduction of intraocular pressure (IOP). Despite complications including transient uveitis and corneal oedema, Nd:YAG laser treatment effectively resolved FMPB and maintained IOP stability. Vision was preserved in one case, while gradual vision loss occurred in the other due to pre-existing and procedure-related complications.

CONCLUSION

Nd:YAG laser membranotomy may offer a minimally invasive option for managing FMPB in some dogs. It may also be a promising alternative to more invasive procedures when appropriate postoperative care is ensured.