![]() ![]() Since the size of the pupil is controlled by the nervous system, a defect in that pathway can also be the cause of dilated pupils. In addition to a dilated pupil, dogs may also have watery eyes, constant blinking, cloudiness in their eyes, eye bulging, squinting, redness, or difficulty seeing. Injuries or illnesses affecting one or both eyes can cause unnatural dilation, including: An ocular exam to look at the inside of the eye, test the pressures within the eye, and the eye’s normal responses may help reveal the cause of the abnormal dilation. If a dog’s dilated eyes can’t be attributed to emotion or the amount of light, they should be seen by a veterinarian. If a pup’s eyes are dilated due to a strong emotion, they should return to normal size after being allowed to calm down for a few minutes. This is to facilitate the stress response allowing more light into the eye so that an animal can better see to “fight or flight.” Even though playtime might not seem like a stressful time, a dog’s nervous system is still firing on all cylinders, so the body wants to make sure the eyes are well-equipped to handle the excessive movement. ![]() Surprise, fear, pain, excitement, and stress can all cause dilation in the pupils. The size of a dog’s pupils can have a lot to do with their emotions. The pupil size should change freely within a few seconds of a change in light. So, when your dog is in a dark room or outside at night, their pupils will dilate in order to let in a sufficient amount of light for their eyes to work properly.Įyes that are working properly should have a small pupil in bright light and dilated pupil in low light. ![]() The less light there is, the larger the pupils will be in order to get the proper amount of light to the back of the eye. The more light there is outside of the eye, the smaller the pupils will be in order not to let in too much light. These muscles change the size of the pupil in response to a number of stimuli: 1. The size of the pupil is changed by a couple of muscles in the iris, or the colored part of the eye. The pupil’s main job is to control the amount of light that gets to the back of the eye. How Does a Vet Diagnose and Treat Dilated Pupils? How Much Will It Cost?.Two Steps You Can Take at Home to Help Your Dog with Dilated Pupils.When Do You Need to Do Something about A Dog’s Dilated Pupil?. ![]()
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