Chromatic and Monochromatic Optical Aberrations After Corneal Refractive Surgery (NCT03893838) | Clinical Trial Compass
UnknownNot Applicable
Chromatic and Monochromatic Optical Aberrations After Corneal Refractive Surgery
Poland100 participantsStarted 2019-02-01
Plain-language summary
Refractive surgeries can be divided into two distinct categories: 1) corneal surgeries (superficial and deep procedures) carried on the surface of the eye and 2) lens surgeries (phakic IOL, refractive lens exchange) - an intraocular intervention, performed in the anterior or posterior chamber or on the lens. In the proposed protocol focus is on the corneal refractive surgeries impact on monochromatic higher-order aberrations on the one hand and chromatic aberrations on the other. During the surgery in order to get the patient emmetropic, refractive surgery corrects optical defects by decreasing aberrations of lower orders ) simultaneously increases high-order aberrations (that is perceived by the patient as halo, glare or starburst). Informations about prevalence and causes of higher order aberrations after refractive surgery are numerous but there is no information about chromatic aberrations.
Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* patient after corneal refractive surgery at least for 4 months
* post surgical refraction within +/- 0.75 diopter of spherical and +/- 1.0 diopter of cylindrical error
* willing and able to understand and sign an informed consent form.
Exclusion Criteria:
* patient unable to participate in the study
* any corneal diseases, eyes trauma or systemic diseases history; keratoconus or tendency of keratoconus
* corneal macula and obvious pannus; current enrolment in another clinical trial/research project
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
number of high order and chromatic aberrations after refractive surgery
Timeframe: 6 months
2
Chromoretinoscopy for near (MEM) and distance
Timeframe: 6 months
3
Aberrometry reading for corneal HOA
Timeframe: 6 months
4
Transverse chromatic aberration
Timeframe: 6 months
Trial details
NCT IDNCT03893838
SponsorWrocław University of Science and Technology