Comparison of the Accuracy of Different Intraocular Lens Power Calculation Formulas in Cataract Patients With Prior Radial Keratotomy

NCT06354296 | Not Yet Recruiting

• 1 other identifier: CAF2024
• Study Type: observational
• Target: 50
• Locations: 0 countries
• Sites: N/A

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 1(D-K) formula, Haigis formula, and MM formula.

Conditions

Cataract

Keywords

cataract; RK surgery; formula

Outcome Measures

Primary Outcomes (1)

• Accuracy of the IOL formula

  To compare the accuracy of four intraocular lens (IOL) calculation formulas in cataract patients after radial keratotomy (RK). They are Barrett True-K formula, Holladay 1(D-K) formula, Haigis formula, and MM formula

  Baseline

Eligibility Criteria

• Age: 18 Years - 80 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

Patients with cataract after RK

You may qualify if:

• Had a previous history of RK surgery
• IOL-Master is available
• There were no intraoperative and postoperative complications
• Obvious refraction was performed 1 to 6 months after cataract surgery

You may not qualify if:

• The investigator decided that it was not suitable for this study

Sponsors & Collaborators

• He Eye Hospital: lead

MeSH Terms

Conditions

Cataract

Condition Hierarchy (Ancestors)

Lens Diseases; Eye Diseases

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: April 3, 2024
• First Posted: April 9, 2024
• Study Start: April 15, 2024
• Primary Completion: August 15, 2024
• Study Completion: August 31, 2024
• Last Updated: April 9, 2024

Record last verified: 2024-04