Definition Patients with ≥-6.00DS are called highly myopic. Precautions 1. Correctly examine and fit glasses. 2.Avoid excessive eye use and prevent eye fatigue. 3.Avoid strenuous exercise and prevent eye collision, because high myopia patients are prone to retinal detachment. 4, If the prescription continues to grow, you should closely monitor the intraocular pressure and regular regular hospital eye pressure and visual field examination, because some of these patients are open-angle glaucoma. 5, vision darkening, deformation, etc. should be timely fundus examination, macular OCT or even FFA examination to exclude fundus pathology. 6.If there is an increase of “flying mosquitoes” in front of the eyes, you should consult an ophthalmologist in time to rule out retinal fissures and early retinal detachment. 7, careful to perform myopia correction surgery (either corneal laser surgery or IOL implantation). 8.Take appropriate herbal medicines to nourish the retina and improve microcirculation, such as Lycium barbarum, Radix et Rhizoma Polygonati, Salvia miltiorrhiza, Salvia miltiorrhiza, etc. (specific evidence should be based on TCM diagnosis), and eat carrots and yellow vegetables and fruits regularly. 9, do at least once a year eye examination.