👀 See the world clearly again! Gentle enough for children and pregnant users. Experience soothing comfort in just 30 seconds! Preservative-free formula shields against irritants. Part of a complete eye care regimen. Safe for all-day wear with contacts. preservative-free 30 sec relief 300 drops Optase Allegro Eye Drops provide rapid relief for dry and itchy eyes caused by environmental irritants, screen time, and contact lenses. With a preservative-free formula, these drops are safe for all users, including children and pregnant women, and come in a convenient .33 oz bottle containing 300 drops.