Fissures are often found in retinal detachments. Finding the lacunae and surgical closure of the lacunae is the key to treating this disease. The lacunae are red in color with a grayish-white surrounding retina and are most often found superior temporally, followed by inferior temporally, and least often nasally. The lacunae in the serrated rim are mostly in the infratemporal or inferior part of the retina. The lacunae can also occur in the macula or in the retina that has not yet detached. They can be round or horseshoe-shaped, or striped, with a detached serrated edge or irregular shape. The detached retina is sometimes so elevated that it can obscure the lacunae, and the patient may be asked to change the head position during the examination. The patient may be asked to change the head position during the examination. The eyes may also be bandaged and bedridden for 1 to 2 days, and then examined when the elevation decreases. So, what are the preventive measures for lattice-like degeneration? The following are preventive measures for lattice-like degeneration: 1. Prevent the occurrence of myopia. 2, the use of eyes should not be overworked. 3.Less strenuous activities. 4.Less lifting of heavy objects. 5.Prevent eye trauma. 6.Patients with myopia should have regular checkups at the hospital, especially those with bad fundus.