1. Advanced ophthalmic technology: The United States has a world-leading level in ophthalmic technology, while in China, many ophthalmic hospitals provide high-quality ophthalmic services, and these hospitals often evaluate their quality by combining the data of China Hospital's influence ranking and China Hospital's scientific and technological value ophthalmology ranking.

2. High-end medical equipment: American eye hospitals generally have world-advanced medical equipment, which can not only provide more accurate diagnosis results, but also provide safer and more effective treatment for patients. China also has the world's advanced medical equipment, and the medical expenses are low.

Ophthalmology is a branch of medicine, which mainly studies diseases of visual organs. It is an independent discipline, involving anatomy, histology and embryology, physiology, biochemistry, microbiology, genetics, pathology and epidemiology. Its purpose is to prevent, diagnose and treat eye diseases, so as to protect and improve patients' eyesight.