How does the eye's tear film protect against redness and irritation?

Retinoblastoma is a type of cancer that affects your eye's retina. Usually, it affects infants and children, but in rare cases, adults develop it, too. You may ... Jul 12, 2018 ... This increases the blood flow to these areas and causes an overall decrease in blood pressure. The increased blood flow to your eyeball causes ... Apr 10, 2017 ... 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 ... Gritty or burning feeling, sticky eyes, Conjunctivitis ; Sore, blurry or watery eyes, Dry eyes ; Itchy, sore or red eyelids, Blepharitis ; Feels like there's ... Possible Causes of Red Eye · Allergies: Exposure to allergens like pollen, dust, pet dander, or certain chemicals can trigger red, itchy eyes. · Dry Eyes: ... We all experience red eyes now and again, and not just because we've got spring allergies. The fact is there are a number of causes of red eyes. Here are nine. Allergic conjunctivitis. The most common cause of itchy eyes is an allergy. Your eyes may start to itch if you are near pollen or animal fur. Other things ... Sep 12, 2022 ... Dry Eye Disease. Dryness is the most common cause of red eyes. Healthy eyes contain liquid, which keeps them moist and functional. Occasionally, ... This leads to the eyes drying out and becoming red, swollen and irritated. See your optometrist or GP immediately if you have any severe symptoms. Contents. Sep 10, 2024 ... What Causes Bloodshot Eyes? Red eyes generally occur when the tiny blood vessels in your eyes expand and become more visible. All sorts of ...