The Influence of Different Preoperative Decision Schemes on the Visual Quality After Toric Intraocular Lens Implantation

Not Applicable

• Conditions: Recruitment of Participants
• Interventions: Procedure: phacoemulsification and Toric intraocular lens implantation

• Registration Number: NCT04006912
• Lead Sponsor: Second Affiliated Hospital, School of Medicine, Zhejiang University

Brief Summary

To study the Influence of Different Preoperative Decision Schemes on the Visual Quality After Toric Intraocular Lens Implantation

Detailed Description

Not available

Study Timeline

• Study Start: 2019-04-10
• Study First Submitted: 2019-06-25
• Study First Submitted QC: 2019-07-01
• Study First Posted: 2019-07-05
• Status Verified: 2020-12
• Primary Completion: 2021-04-01
• Last Update Submitted: 2021-04-02
• Last Update Posted: 2021-04-05
• Study Completion: 2021-05-01

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

1. Age-related cataract (age 55-80)
2. Corneal astigmatism is greater than 1.0D
3. Patients who are willing to implant Toric IOL

Exclusion Criteria

1. Previous or present eye diseases, such as glaucoma, eye trauma, etc
2. High refractive error
3. Previous eye surgery
4. Irregular astigmatism of the cornea

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Steep meridian incision design group	phacoemulsification and Toric intraocular lens implantation	-
Minimal residual theoretical astigmatism group	phacoemulsification and Toric intraocular lens implantation	-

Primary Outcome Measures

Name	Time	Method
Actual residual astigmatism after surgery	3 month postoperation	The actual residual astigmatism value after the operation is measured with the phoropter

Secondary Outcome Measures

Name	Time	Method
Postoperative Totic intraocular lens rotation angle	3 month postoperation	Postoperative Totic intraocular lens rotation angle is observed in each group
Postoperative astigmatism and astigmatism axial of cornea	3 month postoperation	Postoperative astigmatism and astigmatism axial of cornea are measured with Pentacam
uncorrected distance visual acuity (UDVA)	3 month postoperation	uncorrected distance visual acuity (UDVA) is observed in each group
Theoretical residual astigmatism after surgery	3 month postoperation	The theoretical residual astigmatism is obtained by TECNIS Toric online calculator
Corneal Aberrations	3 month postoperation	Corneal aberrations are measured with OPD-Scan Ⅲ

Trial Locations

Locations (1)

Second Affiliated Hospital, Zhejiang University School of Medicine; 🇨🇳 Hangzhou, Zhejiang, China