What is the function of each layer of the tear film?

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 ... 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 ... 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 ... Sep 3, 2024 ... Due to repeated and forceful self-induced vomiting, a sudden increase in pressure from throwing up can increase the pressure inside the eye and ... 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 ... Gritty or burning feeling, sticky eyes, Conjunctivitis ; Sore, blurry or watery eyes, Dry eyes ; Itchy, sore or red eyelids, Blepharitis ; Feels like there's ... Viruses can cause conjunctivitis, such as the familiar red eyes, sore throat, and runny nose of a common cold. Viral conjunctivitis usually produces a ... Jan 29, 2025 ... Q: Can COVID-19 cause eye redness? A: Yes, many people who contract COVID-19 report red eyes. Eye redness is a common symptom of conjunctivitis, ... Aug 16, 2021 ... Common causes of red eyes ... The causes of red eye range from a minor irritation to a more serious condition or infection, including ... Oct 11, 2024 ... You may have a lack of sleep or eye allergies if you wake up with bloodshot eyes.620 Bloodshot eyes after you wake up may be a sign of an ...