Accuracy of IOLMASTER 700 Total Keratometry (TK) (NCT05254587) | Clinical Trial Compass
CompletedNot Applicable
Accuracy of IOLMASTER 700 Total Keratometry (TK)
United States155 participantsStarted 2022-02-08
Plain-language summary
This is a multicenter study to compare the accuracy of IOL calculations in post-laser vision corrected eyes that are about to undergo or have undergone cataract surgery.
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
. Adults, 18 years of age or older at the time of cataract surgery.
. Patient has had LVC and IOL cataract surgery within 3 years or is scheduled to undergo IOL cataract surgery performed for the treatment of visually significant cataracts.
. Best corrected distance visual acuity (BCDVA) potential of 20/30 or better (as measured by Retinal Acuity Meter (RAM) or Potential Acuity Meter (PAM).
. Patients who have a manifest refraction that is myopic or hyperopic after previous LVC.
. Patients that have biometric measurements (including Axial Length) for the IOL cataract surgery that were performed preoperatively with the IOLMaster700, including Barrett True K /TK.
. Signed and received a copy of the signed written informed consent (pertain to the prospective subjects only).
. For prospective patients, willingness and ability to comply with schedule for follow-up visits and postoperative evaluations.
Exclusion criteria
. Patients with a history of any of the following:
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.
1This trial was testing how accurately the IOLMASTER 700 measures something called 'Total Keratometry' — can you explain what that measurement is, and why it matters for planning my cataract surgery or correcting my vision?
2Since this study has already completed, has the data from it influenced which measurement tools or formulas your practice uses when selecting an intraocular lens for patients like me?
3The trial involved people with myopia, hyperopia, and cataracts — given my specific diagnosis, would the type of measurements studied here be particularly relevant to getting the best refractive outcome for my situation?
4If the IOLMASTER 700 is used during my evaluation, how confident are you in its accuracy for my eye type, and are there any reasons you might double-check its readings with a different device?
5Are there alternative measurement approaches or technologies you'd consider alongside or instead of this device, and how do you decide which tool gives the most reliable data for planning my procedure?
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.
. Retinal pathology - Visually significant Epiretinal Membrane (ERM) with loss of foveal contour, Large/ Medium Drusen, Cystoid Macular Edema (CME), History of Retinal Detachment
. Optic neuropathy
. Advanced glaucoma
. Amblyopia
. Strabismus
. Relative Afferent Pupillary Defect (RAPD) indicating an optic neuropathy.