IcoLens

The Institute of Optometry (FHNW) is involved in several projects for the development of intra-corneal lenses created by Neoptics.

Background

Intra-corneal lenses, IcoLens, produced by Neoptics represent a modern alternative to reading glasses or multifocal contact lenses for correcting presbyopia. This project involves a number of activities and tasks.

Metrology of intracorneal lenses

The aim was to find a quick solution for the optical measurement of intra-corneal lenses, ensuring the dimensional accuracy and quality of the IcoLenses in accordance with QA standards. The NIMO-TR1504 device manufactured by Lambda-X was used and a software was developed that can summarise thousands of measurement points as a basis for analysis.

Finite element analysis (FEA)

A FEA was carried out to calculate the visual effect of the intra-corneal lens. This was necessary to understand the biomechanical interactions between the cornea and intra-corneal lens. Changes to the shape of the cornea caused by the intra-corneal lenses cause an intentionally modified visual effect.

Impact study

The suitability of the intra-corneal lens was tested in an impact study; this involved a variety of tasks:

• Defining the optometric examination methods for the selection of suitable subjects and lenses.
• Defining the study parameters/study protocol: determining the primary end point, statistical methods, power analysis
• Statistical analysis of study results, optometric interpretation and conclusions

Development of a nomogram

The findings of the impact study and other areas of the project are being consolidated into a "nomogram", which enables important parameters to be defined for intracorneal lens implantation.

Development of a specialised contact lens

A special contact lens is being developed in order to evaluate patient suitability before surgical intervention.

 

Project information
Client	Neoptics AG
Implementation	FHNW Institute of Optometrie
Project team	Professor Dr. Roland Joos