Comparison of the Effect of Capsular Bend on the Rotational Stability Between Two Toric Intraocular Lenses

(1) To compare the difference of rotational stability and CBI between AcrySof IQ(SN6AT) and TECNIS(ZCU) after cataract surgery. (2) To evaluate the influence of capsular bending on the rotational stability of these two kinds of intraocular lenses.

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Key information

Conditions

Cataract Eye Diseases Lens Diseases

Sex eligibility

All sexes

Study type

Observational

Primary location

Ophthalmology and Optometry Hospital

Wenzhou, Zhejiang 325027, China

About this study

To compare the difference of rotational stability and CBI between AcrySof IQ(SN6AT) and TECNIS (ZCU) torus intraocular lenses implanted after cataract surgery, and analyze the influence of capsular bag bending on the rotational stability of two kinds of astigmatism correction intraocular lenses after cataract surgery.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

1.The patient's age is over 18 years old. 2.Diagnosed as age-related cataract Corneal astigmatism measured before operation is > 0.75 D or predicted after operation after taking into account surgical astigmatism (SIA).

3.Pupil diameter > 7 mm after mydriasis. 4.The astigmatism meridian between IOLMaster and Pentacam is the same (the meridian difference between the two instruments is within 15).

5.After operation, the anterior capsule completely covered the edge of intraocular lens optical surface.

6.Able to understand, cooperate and complete all follow-up.

Exclusion criteria

Moderate and severe dry eye
There is irregular corneal astigmatism.
Combined with other ophthalmic diseases Previous history of ophthalmic surgery.
The capsulorhexis is too large or eccentric, which can not cover the optical zone of intraocular lens all around, and there are intraoperative or postoperative complications.

Treatment and study plan

Primary outcomes

Capsular bend index

Time frame: 1-2 hours after operation, 1 day, 1 week, 1 month and 3 months.

The average value of the capsular bag bending stage in different positions of IOL represents the speed of the whole capsular bag bending formation in the eye.
IOL rotation degree

Time frame: 1-2 hours after operation, 1 day, 1 week, 1 month and 3 months.

The difference of degrees between the actually measured Toric IOL astigmatism axes at two adjacent follow-up time points.
Toric IOL total axial deviation

Time frame: 1-2 hours after operation, 1 day, 1 week, 1 month and 3 months.

The degree difference between the actual axial position and the target axial position of Toric IOL is different.

Sponsors and collaborators

Lead sponsor

Wenzhou Medical University

Other

Registry information

Important dates

Study start: 2024
Primary completion: 2025
Study completion: 2025
First posted: Nov 27, 2024
Registry last updated: Nov 27, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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