B&L Optima Toric Custom MTO lens is a higher power version of the regular Optima Toric lens. The special design ensures exceptionally clear vision and comfort when worn on a daily basis and replaced every six to twelve months as directed by your physician. Sold as a single vial lens. PLEASE NOTE:This product is a custom made to order (MTO) lens, please allow 4 weeks for delivery. Defective custom lenses will be replaced under B&L's 120 day performance guarantee. All sales are final; no refunds or exchanges.