The situations described for this product are all cases where eyes are asked to work longer or under less favourable conditions: long hours at a computer, driving at dusk, extensive reading, and the kind of strain that appears when light changes quickly. Adults who recognise those patterns may choose to include the supplement as part of their daily routine.
Because it is a nutrient-based product rather than a quick-acting substance, it is usually most reasonable to take it consistently over time rather than only on a day when the eyes feel tired. It can be used as a long-course option during a heavy work season, while preparing for exams, or in the months when daylight is short. The 100-tablet pack matches this way of thinking.
That said, the supplement does not replace the basics of visual comfort: wearing the glasses your optician prescribed, taking regular breaks from close work, and attending routine eye examinations. A supplement is an addition to these habits, not a substitute for them.
If you are pregnant, breastfeeding, taking medication, or have an eye condition that requires monitoring, check with a doctor or pharmacist before using this or any other supplement.