Q: My mother's eye is red, swollen, and she feels like there are particles in it. She is wearing sunglasses in the dark to watch TV. Could this be related to her blood pressure? Basil
A: Redness of eyes along with a foreign body sensation (feeling of trash) can be due to allergies most commonly or could be due to other serious issues such as retinopathy (hypertensive or diabetic) or glaucoma. Since it’s on and off, it sounds more like allergic in origin. I will request you to get her an ophthalmology opinion as her eye needs to be examined for her power, for allergic conjunctivitis as well as for power (gonioscopy). This will give a better clue. Meanwhile, you can try refreshing her eyes using tear drops or other lubricating tear drops 2-3 times daily like olopatadine twice daily for a week and let me know if it's improving.