title: Postoperative glaucoma in the Labrador Retriever: incidence, risk factors, and visual outcome following routine phacoemulsification.
abstract: OBJECTIVE
  To evaluate the incidence and risk factors associated with development of postoperative glaucoma in the Labrador Retriever following routine phacoemulsification.
  
  
  METHODS
  Medical records from Labradors and a randomly selected population of non-Labradors were retrospectively evaluated. Signalment, diabetic status, cataract stage, gonioscopic findings, presence of preoperative lens-induced uveitis, development of postoperative hypertension (POH), postoperative glaucoma and postoperative visual status were recorded for each patient. Survival curves were developed using the Cox proportional hazards model.
  
  
  RESULTS
  Forty-two Labradors (66 eyes) and 199 non-Labradors (314 eyes) were included. The incidence of POH was significantly higher in Labradors (33%) than non-Labradors (18%). Labradors were at significantly increased risk of postoperative glaucoma and blindness compared to non-Labradors. Estimated probabilities of postoperative glaucoma in Labradors were 23%, 25%, 30% and 35% at weeks 4, 26, 52 and 104, respectively, compared with 5%, 6%, 7% and 9% at weeks 4, 26, 52 and 104, respectively, in non-Labradors. Estimated probabilities of postoperative blindness in Labradors were 5%, 9%, 15% and 27% at weeks 4, 26, 52 and 104, respectively, compared with 2%, 3%, 5% and 10% at weeks 4, 26, 52 and 104, respectively, in non-Labradors. Risk factors for the development of glaucoma in Labradors included increasing age and development of POH. No statistically significant risk factors for the development of glaucoma were identified in non-Labradors.
  
  
  CONCLUSIONS
  Labradors are at increased risk of glaucoma and blindness following phacoemulsification compared with non-Labradors. POH and increasing age represent risk factors for the development of postoperative glaucoma in Labradors.
authors: Eye Care for Animals, Tustin, CA, USA. emoeller@eyecareforanimals.com
authors: Emily
authors: E
authors: Moeller
authors: Tiffany
authors: T
authors: Blocker
authors: Douglas
authors: D
authors: Esson
authors: Richard
authors: R
authors: Madsen
mesh_terms: D000818:Animals; D001766:Blindness / Q000209:etiology / Q000662:veterinary; D002387:Cataract Extraction / Q000009:adverse effects / Q000662:veterinary*; D004283:Dog Diseases / Q000453:epidemiology / Q000209:etiology* / Q000601:surgery; D004285:Dogs; D005260:Female; D005901:Glaucoma / Q000453:epidemiology / Q000209:etiology / Q000662:veterinary*; D006973:Hypertension / Q000150:complications / Q000209:etiology / Q000662:veterinary; D015994:Incidence; D008297:Male; D018918:Phacoemulsification / Q000662:veterinary*; D011183:Postoperative Complications / Q000453:epidemiology / Q000662:veterinary; D012307:Risk Factors; D013045:Species Specificity