A Comparison of the Accuracy of Toric Intraocular Lens Formulas

NCT04776603 | Completed

• 1 other identifier: Toric-CPJ
• Study Type: observational
• Target: 172
• Locations: 1 country
• Sites: 1

Brief Summary

To compare the accuracy of the Abulafia-Koch, the Barrett, the Barrett Post ,the EVO , the new Holladay with total surgical-induced astigmatism, the Kane and and the Næser-Savini toric intraocular lens (IOL) power formulas using a large database of toric IOL refractive outcomes

Conditions

Astigmatism

Keywords

calculators; cataract; intraocular lens power; toric

Outcome Measures

Primary Outcomes (1)

• A Comparison of the Accuracy of Toric Intraocular Lens Formulas

  percentage of eyes with a prediction error within ±0.50 diopter (D)

  5 years

Study Arms (2)

Group 1

group 1 includes patients who axial length(AL)\<26mm

Group 2

group 2 includes patients who axial length（AL）≥26mm

Eligibility Criteria

• Age: 21 Years - 90 Years
• Sex: all
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Probability Sample

Study Population

Patients who underwent cataract surgery at Eye hospital of Wenzhou Medical University,with insertion of the Alcon SN6AT(2-9) IOL(Alcon Laboratories, Inc, Fort Worth, TX)

You may qualify if:

• uncomplicated cataract surgery with a temporal clear corneal incision,with preoperative biometry using either the IOLMaster 500 (softwareversions 5.5 and 7.7) or 700 (software version 1.50; Carl Zeiss Meditec AG, Jena, Germany)
• subjective manifest refraction performed by any of the orthoptists in the practice and measurement of the actual postoperative axis of the IOL alignment performed in the same visit an average of 1 or 3months after surgery.

You may not qualify if:

• any corneal disease (keratoconus, other ectasia, pterygium, or previous trauma);
• previous ophthalmic operations, including laser vision correction, vitrectomy, pterygium surgery, penetrating glaucoma surgery, or scleral buckling procedures
• intraoperative or postoperative complications
• postoperative corrected distance visual acuity worse than 6/9

Sponsors & Collaborators

• Wenzhou Medical University: lead

Study Sites (1)

Unknown Facility

Zhejiang, China

Location

Related Publications (2)

• Abulafia A, Koch DD, Wang L, Hill WE, Assia EI, Franchina M, Barrett GD. New regression formula for toric intraocular lens calculations. J Cataract Refract Surg. 2016 May;42(5):663-71. doi: 10.1016/j.jcrs.2016.02.038.

  PMID: 27255241 BACKGROUND

• Kane JX, Connell B. A Comparison of the Accuracy of 6 Modern Toric Intraocular Lens Formulas. Ophthalmology. 2020 Nov;127(11):1472-1486. doi: 10.1016/j.ophtha.2020.04.039. Epub 2020 May 1.

  PMID: 32371252 RESULT

MeSH Terms

Conditions

Astigmatism; Cataract

Condition Hierarchy (Ancestors)

Refractive Errors; Eye Diseases; Lens Diseases

Study Design

• Study Type: observational
• Observational Model: CASE ONLY
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Vice president of Eye Hospital of Wenzhou Medical University

Study Record Dates

• First Submitted: November 30, 2020
• First Posted: March 1, 2021
• Study Start: January 1, 2015
• Primary Completion: December 1, 2019
• Study Completion: January 1, 2020
• Last Updated: March 1, 2021

Record last verified: 2021-02

Locations

CN (1)