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NCT07218731
The purpose of the study is to assess participant experience when wearing multifocal contact lenses compared to spherical contact lenses with reading glasses.
NCT07295119
Brief Summary of the Study The goal of this clinical study is to compare the quality of vision and patient satisfaction after cataract surgery using two different approaches to multifocal intraocular lenses (IOLs). These lenses replace the natural lens removed during surgery and are designed to allow clear vision at near, intermediate, and far distances, reducing or eliminating the need for glasses. The study aims to understand whether using two different lens models-Mini Well in the dominant eye and Mini Well Proxa in the non-dominant eye-produces different levels of visual quality, glare, halos, or overall satisfaction compared with implanting the same trifocal lens model (FineVision POD F) in both eyes. All lenses included in the study are approved medical devices already available on the market. Who can participate? Adults scheduled to undergo cataract surgery in both eyes at the Ophthalmology Unit of the Policlinico of Verona may be eligible. A total of 36 participants will take part. How does the study work? Participation is voluntary. After informed consent, participants are randomly assigned (like flipping a coin) to one of two groups: 1. Experimental group: Mini Well lens in the dominant eye and Mini Well Proxa lens in the other eye. 2. Comparison group: FineVision POD F lens in both eyes. Neither participants nor the clinical team conducting postoperative assessments will know which lenses were implanted (blinded study). Before surgery, participants undergo a standard ophthalmic evaluation, including visual acuity tests and measurements of eye structure. After surgery in each eye, follow-up visits take place at approximately 1-2 days, 14 days, 1 month, and 3 months. During these visits, clinicians assess visual performance, eye health, and any symptoms. At the 3-month visit, participants also complete a questionnaire on vision quality and satisfaction, and undergo a specific test to measure perception of halos. Participant responsibilities Participants are asked to attend all scheduled visits, follow medical instructions, use prescribed medications, and promptly report any symptoms or concerns. Potential benefits Participants may experience improved vision at all distances with reduced dependence on glasses. However, personal benefit cannot be guaranteed. The study is expected to help determine whether combining two different lens models provides better visual outcomes than using the same lens in both eyes. Risks and discomforts Risks are the same as those associated with standard cataract surgery and multifocal IOLs, including rare surgical complications and the possibility of visual disturbances such as glare or halos. These symptoms are common with multifocal lenses and often diminish over time, but in rare cases may require further intervention. All adverse events will be closely monitored. Alternatives Patients may choose standard cataract surgery with monofocal lenses, which usually provide clear vision at one distance and may still require glasses for intermediate or near vision. Declining participation will not affect the quality of care. Duration Each participant's involvement lasts about 4 months. Voluntary participation Participants may withdraw at any time without affecting their medical care. Confidentiality All personal and medical information will be handled confidentially and used only according to privacy regulations. Study results may be published anonymously in scientific reports.
NCT07232615
To evaluate the clinical outcomes and patient satisfaction of two commercially available trifocal toric intraocular lenses Primary Objective: To compare the distance-corrected intermediate visual acuity between the two trifocal toric intraocular lenses. Secondary Objectives: To assess and compare the safety of two trifocal toric intraocular lenses.
NCT07051720
Study Goal The goal of this clinical trial is to compare how well four different types of artificial lenses (called intraocular lenses or IOLs) help people see after cataract surgery. The main questions it aims to answer are: Which lens gives the best vision at different distances (far, middle, and close)? How satisfied are patients with their vision after surgery? How often do patients still need glasses after surgery? Who Can Participate Adults aged 22 to 85 years who need cataract surgery in both eyes and meet specific health requirements. Study Design Researchers compared six different lens types: TECNIS Eyhance - designed to improve middle-distance vision AcrySof IQ Vivity - extends the range of clear vision LuxSmart - uses special optics for better depth of focus Rayner EMV - uses gradual light-bending technology for smooth vision transition Eycryl SERT - modifies light focus to extend clear vision range CT ASPHINA 409M - standard single-focus lens (comparison group) Participants chose their preferred lens type after learning about each option's benefits and limitations. What Participants Do? Participants will: Have cataract surgery on both eyes (1-2 weeks apart) Complete vision tests at multiple distances Take contrast sensitivity tests under different lighting conditions Fill out questionnaires about vision quality and daily activities Attend follow-up visits at 1 day, 1 week, 1 month, and 3 months This study helps patients and doctors make informed decisions about which type of artificial lens might work best for individual needs and lifestyle.
NCT06702020
The VIS Opti-K device and procedure were used to provide vision improvement to patients with presbyopia.
NCT06699784
The goal of this clinical trial is to compare the quality of life (QOL) of presbyopes wearing progressive addition lenses (PALs) with that of those wearing single-vision spectacles (SVSs) for near correction. The main questions it aims to answer is: What is the difference in QOL between presbyopes who use SVSs and those who use PALs ? Eligible participants will be randomly assigned in a 1:1 ratio to either the PALs group or the SVSs group.Participants in the progressive lenses intervention group will receive 1-month progressive lens correction in daily life. And participants in single-vision lenses intervention group will use near-vision spectacles during near work and use their original habitual distant glasses for distance tasks for 1 month. The study will compare the QOL scores measured by a 12-item Near Vision-Related Quality of Life questionnaire between the two groups. Additionally, the study will compare the scores measured by the Refractive Status and Vision Profile questionnaire and Visual Analogue Scale questionnaire between the two groups as well as assess the change in the above three questionnaires scores at 1 month following enrollment. And visual acuity of subjects will also be assessed at baseline and at the 1-month follow-up.
NCT02147093
A comparative evaluation of a newly marketed multifocal contact lens with a single vision contact lens when used with near vision spectacles. The evaluation was to quantify the difference between the two test corrections.