Uyen, 28, with 7 diopters of myopia and 1 diopter of astigmatism in both eyes, has regained 20/20 vision thanks to surgery.

Hang, 19, who has had severe myopia and astigmatism since childhood, recently underwent successful vision correction surgery.

After 20 years of wearing glasses, 32-year-old Mai, who had 5.5 diopters of myopia in her left eye and 5 in her right, underwent laser eye surgery to eliminate her dependence on glasses.

Nguyet, 24, nearsighted since she was 11, with her right eye at 5.5 diopters and her left eye at 6 diopters with mild astigmatism, now has 20/20 vision after undergoing refractive surgery.

Several surgical techniques treat astigmatism, the most common being LASIK, Femto-LASIK, SMILE, and phakic intraocular lens implants.

Doctors at Tam Anh General Hospital in Hanoi turned off all the operating room lights to focus light onto a 79-year-old patient's eye during a complex surgery.