An observational study in Myopia, Hyperopia and Cataract, sponsored by Advanced Vision Care. Completed at 7 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-02-20.
Sponsored by Advanced Vision Care · Observational
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.
This is a multicenter study to compare the accuracy of IOL calculations using 4 different IOL calculation methods (Haigis TK, ASCRS calculator, Barrett True K with classic K, and Barrett True K TK) performed using the preoperative biometry data from post-laser vision correct eyes that are about to undergo or have undergone cataract surgery.
1,159 studies on the registry are indexed under Myopia; 225 are open to participants now.
This study's enrollment of 155 is close to the median of 150 across 204 observational studies indexed under Myopia.
Browse Myopia studies →This is the only study on the registry with Advanced Vision Care as lead sponsor.
Counted across the registry records on this site, refreshed daily.
Subjects that have had laser vision correction and cataract surgery (retrospective cohort) or have had laser vision correction surgery and are scheduled for cataract surgery (prospective cohort).
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
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.
Note: The only IOLs permitted for use in this study are Monofocal (ZCBOO, LI61AO, SN60WF, SA60WF, MX60E) and Toric Lenses (Tecnis 2 ZCU, ZCT, SN6ATx, SA6ATx, MX60ET).
Exclusion Criteria:
Patients with a history of any of the following:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Device: IOLMASTER 700 TK
Device: IOLMASTER 700 TK
4 different intraocular lens (IOL) calculation methods (Haigis TK, ASCRS calculator, Barrett True K Classic K, Barrett True K TK) will be performed using the preoperative biometry and post operative refraction data.
Total Keratometry Accuracy Assessment
Subjects utilizing Total Keratometry within (+/- 0.50 D, +/- 0.75 D, +/- 1.00 D) compared to the proportion of subjects utilizing traditional keratometry readings.
Time frame: 4 Weeks
Plan to share: No
Ran from Feb 2022 to primary completion in Jan 2024, 23 months.
Of 87 non-industry observational studies under Myopia, half reached primary completion within 26 months of starting (the median), counting those still running; a quarter within 11 and three quarters within 90. This study's 23 months is below that.
Counting every sponsor, half of 96 studies reached it within 24 months; a quarter within 10 and three quarters within 59.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Feb 2026. You cannot join it, but the record below documents what was studied.
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