Objective—To examine postoperative ocular hypertension
(POH) and other variables as predictors of the
risk of developing glaucoma after cataract surgery in
Animals—220 dogs that had cataract surgery.
Procedure—Medical records of 220 dogs (346 eyes)
that had extracapsular cataract removal or phacoemulsification
of cataracts were reviewed. With
respect to glaucoma development, 8 variables were
analyzed, which included development of POH,
breed, sex, age at time of surgery, eye (right vs left),
phacoemulsification time, intraocular lens (IOL) placement
(yes or no), and stage of cataract development.
Eyes developed glaucoma within 6 or 12 months of
surgery or did not have signs of glaucoma at least 6
or 12 months after cataract surgery.
Results—Of 346 eyes, 58 (16.8%) developed glaucoma
after surgery. At 6 months, 32 of 206 (15.5%)
eyes examined had glaucoma; at 12 months, 44 of
153 (28.8%) eyes examined had glaucoma. Median
follow-up time was 5.8 months (range, 0.1 to 48
months). Mixed-breed dogs were at a significantly
lower risk for glaucoma, compared with other breeds.
Eyes with IOL placement were at a significantly lower
risk for glaucoma, compared with eyes without IOL
placement. Eyes with hypermature cataracts were at
a significantly higher risk for glaucoma, compared
with eyes with mature or immature cataracts.
Conclusions and Clinical Relevance—Multiple factors
appear to contribute to the onset of glaucoma in
dogs after cataract surgery. Complications prohibiting
IOL placement during cataract surgery may lead to a
high risk of glaucoma development. (J Am Vet Med