Astigmatism

This study looks at whether the way a toric intraocular lens is implanted during cataract surgery affects how well it stays in place. Toric lenses correct astigmatism, but if they rotate after surgery, vision can blur. The trial compares two techniques: one using a gel-like subst…

This trial tests whether implanting a fresh corneal lenticule — a thin layer of donor cornea — can improve vision in people with high hyperopia (farsightedness) and high astigmatism. The lenticule is placed using a femtosecond laser, aiming to increase visual acuity and reduce as…

This trial tests whether implanting a fresh, donated corneal lenticule into the eye can reshape the cornea and reduce irregular astigmatism in people who have already had a full cornea transplant. The goal is to improve visual acuity and stabilize the cornea's shape. Twenty-four …

This study compares two common laser eye surgeries—KLEx and FS-LASIK—for treating nearsightedness and astigmatism. Researchers will follow 80 adults aged 21 and older to see which procedure provides better vision without glasses and has fewer side effects. Both surgeries reshape …

This study tests a software program that predicts how much vision improvement a special laser treatment can provide for people with irregularly shaped corneas causing astigmatism. About 45 participants with vision quality issues will have their eyes treated, and the software's pr…

This study looks at how removing a pterygium (a fleshy growth on the eye) and replacing it with a small piece of the patient's own eye tissue changes the shape of the cornea. Researchers will measure the cornea's curve before and one month after surgery in 130 adults aged 30 to 7…

This study compares a new AI system, called AEYE, against a human eye doctor in diagnosing keratoconus and deciding who is eligible for laser vision correction. The AI analyzes patient history, eye scans, and other data to make its recommendations. Researchers will check if the A…

This study looks at how well SMILE PRO laser surgery corrects high astigmatism in people with nearsightedness. 113 patients aged 18 to 40 will have the procedure and be followed for a year to check vision sharpness, stability, and safety. The goal is to see if this advanced laser…

This study compares two methods of removing the outer layer of the cornea during PRK laser eye surgery. One method uses a laser to remove the layer, while the other uses a manual tool. The goal is to see which approach leads to better vision and faster healing. About 100 people a…

This study uses artificial intelligence to predict true eye pressure after corneal refractive surgery like LASIK or SMILE. Standard eye pressure measurements can be falsely low after these surgeries, masking glaucoma risk. Researchers will analyze data from over 10,000 participan…

This study was designed to compare two newer technologies for cataract surgery: a femtosecond laser and a special handpiece that monitors eye pressure. The goal was to see if these tools cause less damage to the cornea and use less energy than standard methods. However, the study…