Evaluation of Axial Stability of Two Models of Intraocular Lenses in Patients With an Eye Length More Than 26 mm

Cataract Senile Clinical Trial

Official title: Comparative Evaluation of Long-term Axial Stability of Two Different Models of Intraocular Lenses in Patients With an Eye Length More Than 26 mm

Status Completed

Clinical Trial Summary

Some parameters, such as a change in the optic tilt and axial decentration, can affect the optical characteristics of intraocular lenses (IOLs) in postoperative period, which leads to residual refractive errors and other complications.

The stability of the intraocular lens in the eye is largely dependent on the mechanical design of its haptic support elements. Thus, the new Clareon IOL has a flat haptic with a flexible design that minimizes axial changes and allows the IOL to maintain a stable position in a given plane during compression.

Currently there is no published data of the stability for Clareon AutonoMe IOL for long eyes.

The purpose of the current study is to evaluate and compare the axis displacement and stability of optical tilt, visual and refractive results in patients after implantation of two different models of intraocular lenses: Clareon AutonoMe (Alcon, USA) and Hoya iSert 251 (Japan) in the long-term postoperative period (after cataract surgery).

Clinical Trial Description

The optical performance of intraocular lenses (IOLs) can be affected by changes in optic tilt and decentration that occur after implantation, resulting in residual refractive errors and other complications. Intraocular lens stability is largely dependent on the mechanical design of the haptics. Clareon IOL has a flat haptic with a flexible design that minimizes axial changes and allows the IOL to maintain a stable position in a given plane during compression.

Based on our knowledge, nobody has compared Clareon AutonoMe and Hoya iSert 251 IOLs in clinical setting.

Scientific Rationale:

This study investigates the stability of IOLs in patients with long axial length. IOL stability on long eyes has a limited clinical data, no in Vivo research has been done. It is known that eyes with long axial length have a large capsule bag. With such eyes, it is difficult to predict the effective lens position.

Each 0,5 mm axial displacement lead to approximately 0,5 D of the refractive error.

For long eyes, it is important to use the latest generation of multi-component IOL calculation formulas for accurately prediction of effective lens position.

The mail purpose of the study is to evaluate and compare the axis displacement and stability of optical tilt, visual and refractive results in patients after implantation of two different models of intraocular lenses: Clareon AutonoMe (Alcon, USA) and Hoya iSert 251 (Japan) in the long-term postoperative period (after cataract surgery).

The research purpose is to evaluate the prediction error for each IOL calculation formula (Barrett Universal II, Kane, EVO, Holladay I with Van Koch correction) ;

Related Conditions & MeSH terms

• Astigmatism
• Cataract
• Cataract Senile
• Corneal Astigmatism
• Myopia

• NCT number: NCT05129566
• Study type: Interventional
• Source: The S.N. Fyodorov Eye Microsurgery State Institution
• Status: Completed
• Phase: N/A
• Start date: October 1, 2021
• Completion date: April 20, 2024