Vitreoretinal techniques gain attention in canine glaucoma care

A new spotlight on vitreoretinal surgery in Veterinary Practice News is putting a niche but increasingly relevant glaucoma procedure back in view: pars plana endocyclophotocoagulation, or ECP, in dogs. While vitreoretinal surgery is often associated with retinal detachment repair and posterior segment disease, this technique shows how vitreoretinal access can also be used to manage refractory glaucoma with the aim of preserving vision in selected canine patients. (pubmed.ncbi.nlm.nih.gov)

The backdrop is familiar to any general practitioner or ophthalmologist who manages canine glaucoma. The disease is a major cause of irreversible blindness, and once pressure is uncontrolled, the window for vision preservation can close quickly. Cornell’s canine glaucoma guidance notes that immediate treatment is needed when glaucoma is confirmed, and that surgical options such as cyclophotocoagulation and gonioimplants are used when medical treatment is no longer enough. ACVO public guidance similarly emphasizes that the fellow eye is often at risk and that surgery may be part of a vision-preserving plan in appropriate cases. (vet.cornell.edu)

What’s different here is the route and the visualization. In the pars plana ECP case report highlighted in the literature, clinicians described successful intraocular pressure control and vision preservation in a dog with refractory glaucoma after prior phacoemulsification, intraocular lens placement, maximized medical therapy, and Ahmed gonioimplantation. The procedure used a pars plana approach to access and laser the ciliary processes, extending the role of posterior segment surgical skills into glaucoma management. (pubmed.ncbi.nlm.nih.gov)

More recently, the evidence base has widened beyond isolated case experience. A 2025 Veterinary Ophthalmology retrospective review covering 389 eyes in 301 dogs treated from 2004 to 2023 found that ECP maintained intraocular pressure control in 90% of eyes at one year and 95% at two years. Post-operative vision was maintained in 63% of eyes at about one year and 49% at two years, with a median time to vision loss of 6.5 months. Repeat ECP was needed in 15.4% of eyes, and the median number of anti-glaucoma medications fell from three before surgery to one at one and two years after surgery. Complications were not trivial, including corneal ulceration in 28% of eyes, blinding hypotony in 11%, retinal detachment in 11%, and hyphema in 10%. (pubmed.ncbi.nlm.nih.gov)

Specialist commentary has long suggested why endolaser approaches have attracted attention. In prior Veterinary Practice News coverage, Dineli Bras, DVM, Dipl. ACVO, said endolaser techniques provide direct visualization of the ciliary body, which may reduce collateral tissue damage compared with less targeted cyclodestructive methods. That reporting also noted perceived benefits in post-operative inflammation and medication burden, although those points should be read as expert perspective rather than head-to-head comparative proof. Separately, a 2019 ACVO Vision for Animals Foundation-backed viewpoint on the future of canine glaucoma therapy underscored that, despite progress in medical and surgical options, there is still no cure and many dogs ultimately lose vision, which keeps pressure on the field to refine earlier and more durable interventions. (veterinarypracticenews.com)

Why it matters: For veterinary professionals, the practical takeaway is less about mastering a niche posterior segment technique in general practice and more about case selection, timing, and client communication. Dogs with glaucoma that is progressing despite medical therapy may still have a vision-preserving path if they reach a veterinary ophthalmologist early enough. The newer ECP data suggest meaningful long-term pressure control is achievable in both primary and secondary glaucoma, but the vision outcomes and complication profile also make clear that these are not simple cases and not guaranteed saves. That makes early recognition of intermittent redness, pain, pressure elevation, post-cataract complications, or declining visual behavior especially important in primary care settings. (pubmed.ncbi.nlm.nih.gov)

The story also reflects a broader shift in veterinary ophthalmology: procedures once limited to a small number of highly specialized surgeons are becoming more relevant as equipment, training, and published outcomes improve. Earlier Veterinary Practice News reporting pointed to a longstanding shortage of deep vitreoretinal experience within the specialty, even as advances in retina and glaucoma surgery expanded what might be possible for canine patients. For referring veterinarians, that means knowing which centers offer endolaser and vitreoretinal capabilities may increasingly shape outcomes for pet parents deciding between aggressive vision-preserving care and palliative or salvage options. (veterinarypracticenews.com)

What to watch: The next important developments will likely be better stratification of which dogs benefit most from ECP alone versus combined procedures, clearer data on repeat-treatment protocols, and more real-world reporting on how long functional vision can be preserved in referral practice. (pubmed.ncbi.nlm.nih.gov)