Zhongshan Ophthalmic Center, Sun Yat-sen University

This study tests two different needle insertion spots (2mm vs 2.5mm from the edge of the eye) during a specific type of lens fixation surgery called YAMANE technique. The goal is to see which spot gives better vision, fewer complications, and more accurate lens placement in child…

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

This study tests special glasses called D.D.C dual-control lenses to see if they can slow down worsening nearsightedness (myopia) in children aged 6 to 14. The lenses use a unique design to prevent the eyes from getting used to the defocus effect, which can make other lenses less…

This study tests whether sending educational text messages (MyopiaEd) to parents can improve how children use their eyes and slow down nearsightedness. About 1,330 third-graders in China will take part, and their eye habits will be checked after one year. The goal is to see if si…

This study looks at 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 aged 18 to 45 with dry eye disease will take part. They will follow on…

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 and follow…

This study looks at whether taking a daily supplement of lutein, zeaxanthin, and meso-zeaxanthin (natural pigments found in plants) can improve contrast sensitivity—the ability to see subtle differences in light and dark—in healthy Chinese adults aged 35 and older. Over 12 months…

This study compares two ways of doing cataract surgery to find out which one helps people see better the day after the operation. The researchers will test a newer method that keeps the surgery inside the lens capsule, hoping it causes less damage to the eye's inner lining. About…

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

This study tests two different methods of centering laser eye surgery (SMILE) in people with nearsightedness and a large angle kappa—a natural offset between the visual axis and pupil center. One method uses a 50% correction, the other 100%. Researchers want to see which approach…

This study compares a new eyelid support plate to a standard glass rod for eyelid massage in people with dry eye caused by meibomian gland dysfunction. About 142 adults aged 18 to 60 will receive one of the two massage methods. The goal is to see which approach better reduces dry…

This study tests whether a special lens implant, set for monovision (one eye for distance, one for near), can improve vision without glasses in people with cataract and high myopia. About 66 participants will receive the lens in both eyes and be followed for a year. The goal is t…

This educational study tests whether a single session of structured AI guidance can improve the quality of narrative literature reviews written by medical postgraduate students. 102 students will be randomly assigned to either receive structured AI assistance or use AI freely. Th…

This study will check the eyes of 3,000 people in Xinxing County, including schoolchildren, seniors, and people with diabetes. The goal is to measure how common vision problems like nearsightedness and cataracts are, and how well they are being treated. Participants will have sim…

This study aims to find the best dose of alfentanil (a painkiller) when used with propofol (a sleep medicine) to place a breathing tube (LMA) in children aged 7-12 having day surgery. About 40 children will take part, and the goal is to see which dose works best with the fewest s…

This study follows 421 people with keratoconus, an eye condition that thins and bulges the cornea, to learn how it progresses and what factors affect it. Participants will have regular eye exams and imaging, but no new treatments are tested. The goal is to better understand the d…