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Eye redness is most often due to swollen or dilated blood vessels. This makes the surface of the eye look red or bloodshot. Oct 30, 2021 ... What is causing my dog's red eyes? · Allergies · Eye Injury or Trauma · Conjunctivitis · Dry Eye Syndrome. Dec 30, 2023 ... This cause of red, irritated eyes can range from quite mild to very serious. Your dog may have a hair or piece of grass stuck in their eye that ... Red eye is caused by light reflecting off the retina at the back of your eyes. Generally, it happens in low light conditions when a flash is used. May 27, 2020 ... Another issue that might cause you to wonder why your dog's eyes are red is dry eye, the common term for keratoconjunctivitis sicca (KCS). This ... Jul 9, 2019 ... A subconjunctival hemorrhage happens when a small blood vessel (capillary) breaks underneath the conjunctiva of your baby, causing a bloodshot ... Oct 22, 2019 ... Possible causes of eye redness · Allergies: If you have allergies, your eyes may also see the difference with changing seasons. · Broken blood ... Viruses can cause conjunctivitis, such as the familiar red eyes, sore throat, and runny nose of a common cold. Viral conjunctivitis usually produces a ... May 23, 2024 ... Causes. Bloodshot eyes appear red because the vessels at the surface of the white portion of the eye (sclera) become swollen. Vessels may swell ... Apr 7, 2023 ... What Causes Red Eyes? Bloodshot or red eyes eyes are usually caused by an external irritant, called an allergen. Irritated eyes can look ...