Astigmatism

Researchers are studying whether spectacle lenses designed to slow myopia progression affect astigmatism in children aged 6 to 13 who have both myopia and astigmatism. All participants wear the study lenses daily for one year and visit the Essilor R&D Centre for follow-up eye mea…

Researchers are testing a new type of implantable lens, called a diffractive trifocal phakic ICL, in adults aged 21 to 60 with myopia (nearsightedness) with or without astigmatism. The lens is surgically placed inside the eye to correct distance vision while also aiming to improv…

Researchers are testing a new type of implantable lens, called an aspheric ICL, to correct or reduce nearsightedness (myopia) with or without astigmatism. The lens is placed inside the eye during surgery and is designed to improve vision. This small study will include 10 people a…

This trial evaluates Paragon CRT contact lenses with a 5mm optic zone diameter, worn overnight to temporarily reshape the cornea and correct myopia and astigmatism. Participants aged 6 to 35 will wear the lenses daily for a short period, and their comfort and visual performance w…

Researchers are testing a new device called SmartEyes that measures refractive errors, which are vision problems like nearsightedness. The study involves 200 children and teens aged 6 to 17 who need eye exams. The trial compares SmartEyes with standard equipment and subjective re…

This study checks if a Turkish version of the DDIVAT digital vision test gives the same results as the standard Snellen eye chart. About 200 Turkish-speaking adults, with or without glasses, will take both tests. No drugs or procedures are involved, and there are no risks.

This trial investigates whether a new type of eyeglass lens, called a With-the-Rule Astigmatic Defocus Lens, can prevent the development of myopia (nearsightedness) in children aged 6 to 9 who have low hyperopia (farsightedness). The lens creates a 'defocus' signal around the ret…

Researchers compare two monthly replacement silicone hydrogel multifocal toric contact lenses in people over 40 who already wear soft contacts. The study measures how easy the lenses are to handle, especially removal, and other performance factors. About 60 participants with asti…

This trial compares pain relief from bandage contact lenses soaked in the anti-inflammatory drug ketorolac versus plain lenses after photorefractive keratectomy (PRK), a type of laser eye surgery. PRK often causes significant pain in the first few days as the cornea heals. The st…

This study tests whether placing surgical cuts in specific parts of the cornea during cataract surgery can reduce astigmatism (blurry vision from an irregularly shaped cornea) and lower the need for glasses afterward. About 100 people with cataracts and astigmatism will be random…

This study tests a new excimer laser for LASIK surgery to correct mild nearsightedness (up to -1.00 diopter) with or without astigmatism. About 32 adults aged 22 and older will receive the treatment in one or both eyes. The goal is to see if the laser safely and accurately improv…

This study follows 1,000 preschool children (ages 0-6) with refractive errors like nearsightedness, farsightedness, or astigmatism. Researchers aim to map how these conditions progress, identify related health issues, and find the best ways to correct vision early. The goal is to…

This study will use a special imaging device (AS-OCT) to measure the thickness of the cornea's outer layer in 360 adults with nearsightedness, farsightedness, astigmatism, or normal vision. The goal is to see if different vision problems have unique thickness patterns. Participan…

This study looks at whether a new, objective way to fit toric contact lenses (for astigmatism) gives the same results as the traditional subjective method. About 45 adults with astigmatism will have their lens prescription checked both ways. The goal is to see if the new method c…

This study looks at how well REVIVE samfilcon B custom toric contact lenses work for people with astigmatism. About 30 adults will wear the lenses, and eye doctors will rate their satisfaction after 14 days. The goal is to see if these lenses provide clear vision and are easy to …