Zhongshan Ophthalmic Center, Sun Yat-sen University

This study tests two different needle insertion points during a specific eye surgery (YAMANE technique) for children and teens aged 4-18 with a condition called congenital ectopia lentis, where the eye's natural lens is out of place. The goal is to see which needle position leads…

This study tests two different needle insertion spots (2mm vs 2.5mm from the edge of the clear part of the eye) during a special lens implant surgery for children aged 4-18 with congenital ectopia lentis, a condition where the eye's natural lens is out of place. The goal is to se…

This study tests special glasses called D.D.C lenses that may slow down worsening nearsightedness (myopia) in children. About 316 kids aged 6 to 14 with mild to moderate nearsightedness will wear these lenses for 24 months. The goal is to see if the lenses are safe and better tha…

This study tests whether sending educational text messages (MyopiaEd) to parents can improve eye-care habits and slow nearsightedness in 1,330 third-grade students in China. Over one year, researchers will measure changes in outdoor time, screen use, and other behaviors. The goal…

This study tests whether a special lens setting during cataract surgery can improve vision for people with high myopia (severe nearsightedness). 66 adults will get an enhanced lens in both eyes, with one eye set for distance and the other for near vision. Researchers will compare…

This study compares two methods of centering laser eye surgery (SMILE) for people with nearsightedness. The goal is to see which method reduces blurring and improves visual quality after surgery. About 100 participants will be randomly assigned to one of the two methods and follo…

This study tests whether taking a daily supplement of three plant pigments (lutein, meso-zeaxanthin, and zeaxanthin) for one year can improve contrast sensitivity—the ability to see subtle differences in light and dark—in healthy Chinese adults aged 35 and older. 220 participants…

This study tests if a newer LASIK method called laser blended vision (LBV) helps people with presbyopia (age-related trouble seeing up close) better than the standard monovision LASIK. About 100 adults aged 40 to 55 will be randomly assigned to one of the two surgeries. Researche…

This study tests whether doing Baduanjin (a gentle exercise) or laughter exercises, along with using artificial tears, can improve dry eye symptoms better than using artificial tears alone. About 540 adults with dry eye will take part. They will practice their assigned activity f…

This study compares two ways to perform cataract surgery: one that breaks up the lens inside the lens capsule and one that does it above the capsule. The goal is to see which method helps patients see clearly sooner after surgery. About 128 adults aged 50 to 90 with dense catarac…

This study looks at whether making a small adjustment for eye alignment (called kappa-angle compensation) during SMILE laser surgery can improve visual quality for people with nearsightedness. About 224 participants aged 18 to 40 will be randomly assigned to receive the surgery w…

This study aims to find the best dose of alfentanil, a pain medicine, when used with propofol to place a breathing tube (LMA) in children aged 7 to 12 having day surgery. About 40 children will take part, and researchers will adjust doses based on how well the tube goes in. The g…

This study will check the eyes of 3,000 people in Xinxing County to see how common vision problems like needing glasses or cataracts are, and how well they are being treated. Participants include school children, seniors over 65, and people with diabetes. The goal is to measure a…

This study watches 300 cataract patients to see if the position of the surgical tip during surgery changes how the cornea heals and how quickly vision improves. Participants will have special imaging during their operation to track the tool's location. The goal is to find the bes…

This study will follow 421 people with keratoconus, a condition that thins and bulges the cornea, to learn how it progresses and what factors increase risk. Researchers will track changes in eye shape and vision over time. The goal is to improve how doctors manage the disease and…