Optase Moist Heat Eye Mask For Blepharitis MGD Dry Eye recommended by opticians. Condition is New. Dispatched with eBay delivery – Packlink 2-3 days. HEAT HOT EYE MASK Effective relief from dry eye, Blepharitis and MGD, chalazion How To Use OPTASE® Moist Heat Mask is simple to use. All you have to do is heat it in the microwave for 25 seconds to give your eyes 10 minutes of the prescribed Moist Heat Therapy.