Optometry is to obtain the best corrected vision by subjective judgment with the help of subjective and objective comprehensive examination, so as to judge the nature and degree of ametropia. Due to the subject's age, wearing history, the degree of difference between new and old glasses, the subject's adaptability and adjustment ability, as well as the influence of abnormal eye position and adjustment factors, the best correction result does not necessarily make the subject comfortable or meet the subject's subjective needs. Therefore, the optometry result under the best corrected vision is called the diagnostic optometry prescription.

On the basis of the results of diagnostic optometry, the optometrist comprehensively analyzes and forms the prescription according to the subjects' self-regulation, adaptability, subjective needs and other factors, the principles of clarity, comfort, durability and conducive to the prevention and control of juvenile myopia and the subjects' eye function health, and combined with the correction methods such as lens frame selected by the subjects. The purpose is to reasonably combine the scientific correction with the needs of the subjects.

With the increase of public eye use intensity, eye related vision problems and fatigue problems are becoming more and more serious, but the demand for high-quality vision is higher and higher, which requires employees to have good communication skills on the one hand, comprehensive theoretical knowledge and comprehensive skills on the other hand, and more importantly, the spirit of excellence and the comprehensive ability to deal with difficult problems.