ASTIGMATISM

This study looks at whether making tiny laser cuts on the cornea (called arcuate incisions) along with implanting a special lens that can be adjusted after surgery (Light Adjustable Lens) can better correct astigmatism in people having cataract surgery. About 60 adults will take …

This study compares two different trifocal toric lens implants used during cataract surgery to correct cataracts, astigmatism, and presbyopia (difficulty seeing up close). About 138 adults with regular corneal astigmatism will receive one of the two lenses. The main goal is to se…

This study tests special custom lenses placed during cataract surgery to improve vision in people with irregularly shaped corneas. The lenses aim to correct hard-to-treat astigmatism that standard lenses cannot fix. The study will enroll 15 adults and measure how much their visio…

This study follows 52 people aged 18-39 who are getting LASIK surgery to correct nearsightedness and astigmatism. Researchers will ask participants about their satisfaction, vision quality, and daily-life improvements up to 3 months after surgery. The goal is to better understand…

This study compares a new form of LASIK called Ray-Tracing Guided LASIK to three other common vision correction surgeries for nearsightedness and astigmatism. About 120 adults aged 22-50 will have one eye treated with the new method and the other eye with one of the other surgeri…

This study looks at how comfortable daily disposable contact lenses are for people with astigmatism who wear them for long hours. About 40 current contact lens users will try the lenses and rate their comfort. The goal is to see if these lenses can make long wear days more pleasa…

This study looks at how well LASIK eye surgery improves vision in both normal and dim lighting for people with nearsightedness and astigmatism. About 50 adults will have the surgery and be followed for 3 months. The goal is to see how satisfied they are with their vision and qual…

This study looks at how comfortable and clear TOTAL30 multifocal contact lenses feel after wearing them for up to 16 hours. About 36 adults aged 40 and older who already wear multifocal lenses will rate their comfort and vision at different times over 30 days. The goal is to see …

This study compares two types of LASIK eye surgery to see which one works better for nearsightedness and astigmatism. About 70 adults aged 22 and older will have one eye treated with wavefront-guided LASIK and the other with ray tracing-guided LASIK. The goal is to find out if on…