My 3 y/o also suffers from bad "allergy eyes." His eyes have been red and very swollen, plus they weep and produce matter. Poor thing sometimes looks like he can barely see out of the narrow slits left by the swelling. He rubs his eyes furiously, and has cried about how much his eyes hurt. The pediatrician gave him once-a-day Claritin, but said we could use Allegra, which is stronger, if necessary. We moved to twice-a-day Allegra. The doctor also gave us samples of Pataday, plus a prescription to fill if the Allegra didn't do the trick. Allegra wasn't enough; it didn't alleviate the eye redness, swelling, weeping. The Pataday does offer relief. I wish we could eliminate our son's exposure, but children play outside. They go out daily at my son's home day care, and he feels isolated when kept inside while other children play. We do keep our house and cars closed, however. Tip: put in the Pataday drops at the beginnig of the day, before pollen exposure. Our son doesn't like the drops going in (what little child does?), but he answers in the negative when I ask if they hurt. He's at the point where he recognizes that they help, so he submits to the routine of putting them in. It's been about a week, but the combination of Allegra and Pataday gives us significant improvement. Also, make sure children are washed head to toe before bedtime, and try to avoid contaminating bedding at nap times. I hope this helps. Good luck! Like us, I bet you're hoping this is limited to Spring, and won't proceed into Summer.