1. Design Principle: The user can see the dropper of the eyedrop bottle and his eyeball by using the reflection of the mirror, so as to drop the eyedrop easily and confidently.2. Applicable: Two types of the elastic bayonet for large and small holes, which can be replaced by yourself, suitable for eye drops of different diameters.3. Safe Material: Made of ABS + PC + Lens, safe to use, easy to clean, can be used for a long time.4. Protect Your Eyes: Shaped to fit comfortably over your eye. Safely designed to keep the bottle tip far and clear of your eye, to reduce the risk of injury and infection.5. How To Use: Step 1: Select the appropriate elastic bayonet to fit into the frame. Step 2: Unfold the mirror and insert the mouth of the eye drop bottle into the bayonet. Step 3: When using, please lie down, pull down the face of the eye, put the eye dropper close to the eye, and look at the mirror. Step 4: Slightly adjust the eye dropper so that the drip tip seen in the mirror is aimed at the eyeball, squeeze the eye drop bottle at this time, and the eye drop can be accurately dropped into the eye. Step 5: After use, take out the eye drop bottle by turning it counterclockwise.