Vitamins for eyes and vision in Guatemala

Good day, forum! I came to Guatemala to work for a few months. I constantly feel irritation in my eyes. I think it's due to constant stress, a lot of work on the computer, and also, I think, the long flight might have had an impact. I am 54 years old, these could also be age-related changes. Therefore, I am in search of a remedy that can help me solve this discomfort. I would like to find a natural remedy that is not difficult to acquire in Guatemala. I have read many good reviews about Vizoptic capsules. They contain bilberry extract, lutein, and zeaxanthin. Looks pretty good. Please, has anyone already used this product? Are they really effective? I would be very grateful for your feedback and recommendations!