You might be having allergic reactions triggered by your exercise. When you do certain workouts at the gym, like lifting weights or floor exercises, your eye swells up. This could be due to allergens at the gym or materials from the equipment. It's good that outdoor activities don't cause this problem. To prevent the symptoms, try wearing protective eyewear (goggles) at the gym or using antihistamine eye drops before you work out. It's a good idea to consult with an allergist for a complete evaluation and management plan.

The symptoms you are experiencing, may or may not be linked to the dosage of sertraline. It is better to consult with a eye doctor for proper evaluation 

Are you studying? Make sure to wear your astigmatism glasses! Not wearing them can negatively affect your preparation. Astigmatism causes blurry vision and eye strain, leading to discomfort and headaches. Astigmatism occurs due to an irregular shape of the cornea or lens, but wearing glasses can correct blurry vision, helping you study more effectively.

Your condition could be caused by allergies or medications.. Consult an ophthalmologist to determine the root cause. Apply warm compresses and avoid certain environments. Artificial tears or gels can also alleviate dryness . But don't go for self treatment, contact a specialized earliest