A few extra pounds might not just slow your dog down. They could be raising pressure inside their eyes. The findings suggest that maintaining a healthy weight isn’t just about mobility or heart health; it may also be one of the most important, and modifiable, ways to protect a dog’s long-term vision.
The Hidden Link to Glaucoma
A new study led by Dr. Oren Pe’er from the Koret School of Veterinary Medicine at The Hebrew University of Jerusalem has found a clear link between a dog’s body weight and the pressure inside their eyes. While many owners are aware that excess body weight can contribute to systemic conditions such as insulin resistance, diabetes mellitus, chronic low-grade inflammation, and orthopaedic disease, this research suggests that obesity may also be an important risk factor for serious ocular conditions, including glaucoma.
The Weight-Eye Connection
The study examined 40 healthy dogs, ranging from lean to obese, and assessed their body fat using several methods, including a 9-point body condition score and a canine version of BMI. The findings revealed a clear link between weight and eye health: overweight and obese dogs had significantly higher average eye pressure (20.3) compared to lean dogs (13.7). While both measurements fall within a generally safe range, the heavier dogs were much closer to the upper threshold of 25, where problems typically begin. The trend was consistent across the scale,each one-point increase in body condition score was associated with nearly a two-point rise in eye pressure, suggesting that as dogs move from a healthy weight toward being overweight, their eyes experience steadily increasing strain.
Why Does This Happen?
Scientists believe several factors might be at play. Physical changes like fat accumulation around the eye or increased venous pressure might make it harder for fluid to drain. Additionally, metabolic changes caused by obesity, such as higher levels of certain fats and hormones in the blood, could influence eye pressure. In the study, overweight dogs had higher levels of triglycerides and leptin, which is a hormone related to body fat. Both of these were linked to higher eye pressure in the initial findings.
"Higher body condition in normal dogs is significantly associated with higher intraocular pressure," says lead researcher Dr. Oren Pe'er. "Obesity might be a modifiable risk factor in dogs predisposed to glaucoma."
What Can Owners Do?
While the eye pressure in both groups of dogs was still within the normal range of 10 to 25 mmHg, the difference of 6.6 mmHg between the lean and overweight dogs is notable. For breeds already at risk for glaucoma, this extra pressure could be a relevant factor in their long-term eye health. The main takeaway for pet parents is that weight management is not only about mobility or general wellbeing. Maintaining a healthy body condition plays an important role in preserving normal ocular physiology and reducing the risk of eye disease, particularly in breeds that are already predisposed to ocular problems.
The research paper titled “Relationship between body adiposity, metabolic status, and intraocular pressure in dogs” is now available in Journal of Veterinary Internal Medicine and can be accessed here. https://doi.org/10.1093/jvimsj/aalaf086.
For a century, the Hebrew University of Jerusalem has been a beacon for visionary minds who challenge convention and shape the future. Founded by luminaries like Albert Einstein, who entrusted his intellectual legacy to the university, it is dedicated to advancing knowledge, cultivating leadership, and promoting diversity. Home to over 23,000 students from 90 countries, the Hebrew University drives much of Israel’s civilian scientific research and the commercialization of technologies through Yissum, its tech transfer company. Hebrew University’s groundbreaking contributions have been recognized with major international awards, including ten Nobel Prizes, two Turing Awards, and a Fields Medal. Ranked 88th globally by the Shanghai Ranking (2025), Hebrew University marks a century of excellence in research, education, and innovation. To learn more about the university’s academic programs, research, and achievements, visit the official website at http://new.huji.ac.il/en.