Ignite Creation Date:
2024-05-06 @ 8:22 PM
Last Modification Date:
2024-10-26 @ 3:26 PM
Study NCT ID:
NCT06354296
Status:
NOT_YET_RECRUITING
Last Update Posted:
2024-04-09
First Post:
2024-04-03
Brief Title:
Comparison of the Accuracy of Different Intraocular Lens Power Calculation Formulas in Cataract Patients With Prior Radial Keratotomy
Sponsor:
He Eye Hospital
Organization:
He Eye Hospital
Study Overview
Official Title:
Comparison of the Accuracy of Different Intraocular Lens Power Calculation Formulas in Cataract Patients With Prior Radial Keratotomy
Status:
NOT_YET_RECRUITING
Status Verified Date:
2024-04
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
The Web-based Barret True K formula with no history formula has been proven to be a good choice for cataract patients after RK in several studies The American society of cataract and refractive surgeons provides several IOL formulas for cataract patients who have undergone previous corneal refractive surgery In cases where only IOL-Master data are available Holladay 1 Double-K Holladay 1 D-K can be used for IOL power calculation in cataract patients with a history of RK The traditional Haigis formula has also been shown to be effective for cataract patients after RK To compare the accuracy of four intraocular lens IOL power calculation formulas in cataract patients after RK They are Barrett True-K formula Holladay 1D-K formula Haigis formula and MM formula
Detailed Description:
Myopia is the most common cause of distance vision impairment The prevalence of myopia has increased dramatically in the past few decades especially in China Corneal refractive surgery is an effective method to correct adult myopia Radial keratotomy RK is one of the corneal refractive surgeries developed in the 1980s Thirty years ago many myopic patients underwent RK As patients age more and more patients have cataracts requiring cataract extraction and intraocular lens IOL implantation The selection of appropriate and accurate IOL is an important factor to improve patient satisfaction Recent studies have compared the accuracy of the newly developed IOL formula in patients with previous RK cataract However as a country with myopia and myopia surgery there is no similar study in China In addition most patients with cataract after RK had lost ocular data before RK surgery For RK patients without previous ocular data how to accurately calculate the IOL power is still a clinical challenge
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
False
Is a FDA Regulated Device?:
False
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None