The image illustrates the evaluation of the thermography image using IRBIS. The minimum, maximum and mean temperatures are calculated from the circle overlying the equine eye in °C. The image illustrates the evaluation of the thermography image using IRBIS. The minimum, maximum and mean temperatures are calculated from the circle overlying the equine eye in °C. The mean temperature of each image was noted and used for further evaluation J O Rushton et al. Vet Rec Open 2015;2:e000089 ©2015 by British Veterinary Association