keep the bottle tightly closed

Be careful with contact lens solution. Dont transfer it into another container because this can cause contamination. Dont let the tip of the bottle touch anything and keep the bottle tightly closed when youre not using it. Contact lenses are one of the safest medical devices when worn responsibly, says Thomas L. Steinemann, MD, a professor of ophthalmology at Case Western Reserve University in Cleveland and a spokesperson for the American Academy of Ophthalmology.