A small eye fissure is a fissure that looks short for various reasons. The fissure is the gap between the upper and lower eyelids, which is commonly referred to as the eye slit. The most important factor that affects the size of the eye fissure is the inner canthus, followed by the outer canthus. The inner canthus is an additional half-moon skin fold that connects the upper and lower eyelids, covering the intersection of the upper and lower lines of the inner canthus, the inner lake, and the meatus, making the inner corner of the eye at an obtuse angle, giving the impression of a widened orbital distance and a short eye fissure. In general, the eye is too prominent or the distance between the eyebrow and the upper edge of the eyelid is too close (less than 18mm), or the long diameter of the eye fissure is short (the so-called small eye fissure, the normal long diameter of the eye fissure is about 34mm). Pay attention to prevent eye trauma, to eat more food rich in vitamin A and D such as animal liver, fish, honey and eggs, etc. Carotenoids and lycopene are both prerequisites for vitamin A, so eating more carrots and tomatoes is also good for the eyes. In addition, eye care but also appropriate calcium, in fact, the intake of vitamin D can increase the body’s absorption of calcium. Always remember not to be partial and picky eaters.