M&G Ocular Prosthetic Products › Retaine Nighttime Ointment (5g) Image 1 of 2 Image 2 of 2 Retaine Nighttime Ointment (5g) $15.00 A preservative free nighttime ointment provides relief for severe, dry, irritated eyes. Ideal for use at night/before bed. Quantity: Add To Cart Added! A preservative free nighttime ointment provides relief for severe, dry, irritated eyes. Ideal for use at night/before bed.