There were 52 border collies at the Animal Health Trust in Kentford last Friday helping the animal health research charity to mark World Glaucoma Week.
They came from as far as South Wales to attend the event where talks were held on AHT research projects on the breed, including on glaucoma and epilepsy.
The dogs contributed to boosting the sample numbers from border collies, by having eye examinations and DNA samples taken.
An estimated 1,500 dogs a year in the UK, of all breeds, are affected by primary glaucoma, with the majority needing both eyes removed.
For more infomation on the research visit www.aht.org.uk/giftofsight