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Peer-reviewed veterinary case report

Eye pressure changes after laser treatment in cats

By Stoiber, Josef et al.·Published in Ophthalmic surgery, lasers & imaging : the official journal of the International Society for Imaging in the Eye·2005·Bascom Palmer Eye Institute, United States·View original on PubMed

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Original publication title: Trabecular meshwork alteration and intraocular pressure change following pulsed near-infrared laser trabeculoplasty in cats.

Species:
cat

Plain-English summary

A group of healthy cats underwent a special laser treatment to help lower eye pressure, which is important for preventing conditions like glaucoma. The cats received one of three types of lasers, and the results showed that their eye pressure dropped significantly after treatment, with no damage to the eye's structure. The lasers worked by affecting pigment cells in the eye without harming the surrounding tissue. This treatment could be a safe option for managing high eye pressure in cats.

People also search for: cat eye pressure treatment · glaucoma laser treatment for cats · how to lower cat eye pressure

Abstract

BACKGROUND AND OBJECTIVE: To comparatively assess the safety and variation in intraocular pressure (IOP) of two pulsed near-infrared lasers (titanium:sapphire and alexandrite) for laser trabeculoplasty versus conventional blue-green argon laser trabeculoplasty in an animal model. MATERIALS AND METHODS: The left eyes of 15 healthy cats received a 180 degree laser trabeculoplasty treatment: 5 with a titanium:sapphire laser, 5 with an alexandrite laser, and 5 with an argon laser. Preoperatively and postoperatively, all animals underwent tonometry, gonioscopy, and slit-lamp examination. The cats were observed up to 12 weeks. Scanning electron microscopy and histologic examination were performed to evaluate potential alterations in the trabecular meshwork structure. RESULTS: IOP at 1 hour, 1 day, and 1 week following treatment was remarkably lower, irrespective of the laser source used. Following treatment with both near-infrared lasers, gonioscopy showed depigmentation underneath the area of the treated trabecular meshwork and histologic evaluation showed a decrease in pigment density. On scanning electron microscopy, damage to the trabecular meshwork structure could not be detected after treatment with near-infrared lasers. CONCLUSIONS: Near-infrared laser trabeculoplasty was found to be effective to temporarily lower IOP in cats. The lasers selectively altered pigment-containing cells, avoiding structural damage of the trabecular meshwork anatomy.

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Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/16358427/