One product, one job. ScleralFil is a buffered, sterile, preservative free saline made for filling and rinsing lenses, and it is buffered to sit close to the pH of the eye's own surface. Each vial is sealed until you open it, which is what allows the formula to skip preservatives entirely.
ScleralFil Preservative Free Saline Solution, 0.34 fl oz vials, 30 to a pack, labeled for scleral, soft and rigid gas permeable lenses.
The first question is what you need saline for. Scleral wearers fill the bowl of the lens before insertion, so the fluid stays against the cornea for the whole wearing day. Rigid gas permeable and soft lens wearers more often use saline to rinse. ScleralFil is labeled for all three lens types, which is useful if more than one person in the house wears lenses or if you have switched materials recently.
The second question is format. Single use vials cost more per milliliter than a large bottle, and they buy you two things in return: no preservative, and a fresh seal every time. Vials are also simpler to travel with, since a small pack fits a carry on without any repackaging.
Nutrifill is the other preservative free saline in our range, and the two are worth comparing on pack size and formulation before you settle on one.
Whichever you pick, the practice that fit your lenses is the right place to send questions about lens care routines, wearing schedules and anything that changed after a refit.