Eyes commonly become more sensitive with age, and the reasons are physiological rather than mysterious. The tear film changes: tear production often decreases and the oily layer that stops tears evaporating becomes less stable, so the eye surface is drier and less protected. Dry eye is one of the most common age-related eye complaints there is. Meanwhile the skin of the lid thins, so it is more permeable to whatever is sitting on it.
The practical consequence is that a mascara you wore for twenty years can start stinging without the formula having changed at all. What changed was the eye. That is worth knowing because it stops the search for a culprit product and starts a more useful search for a formula with less in it.
The irritation usually comes from one of four places. Fragrance, which is in more eye products than people expect and has no function in them. Removal friction and solvent, which is the largest cause and the least discussed — a waterproof formula requires an oil or solvent plus rubbing, within millimeters of the eye surface. Flaking, where small particles of a dried wax formula fall into the eye during the day. And preservatives, which every water-containing cosmetic needs and which a minority of people react to.
Three of those four point the same way as every other page in this hub: a tubing formula, non-waterproof, removed with warm water. It does not flake, because the polymer sleeve stays intact rather than crumbling. It does not need solvent. And it does not need rubbing.
One clear boundary. Persistent redness, itching, grittiness, watering, blurred vision or crusting are not a makeup problem and this site cannot help with them. Dry eye, blepharitis and allergic conjunctivitis are all common, all treatable and all a doctor's or optometrist's question. Nothing here is medical advice, and if your eyes hurt, the right next step is an appointment rather than a different mascara.
