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Related Experiment Video

Updated: Apr 3, 2026

Development of an In Vitro Ocular Platform to Test Contact Lenses

Development of an In Vitro Ocular Platform to Test Contact Lenses

Published on: April 6, 2016

Wearable telescopic contact lens.

Ashkan Arianpour, Glenn M Schuster, Eric J Tremblay

|September 15, 2015

Summary

This study presents a novel switchable telescopic contact lens for low-vision aid, offering both 1x and 2.8x magnification. The scleral lens design integrates a compact telescope for enhanced visual acuity.

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Area of Science:

Ophthalmology and Vision Science
Biomedical Engineering
Optics and Photonics

Background:

Low vision significantly impacts quality of life, necessitating advanced assistive devices.
Existing telescopic aids can be bulky and cumbersome for daily use.
Scleral contact lenses offer a stable platform for ocular device integration.

Purpose of the Study:

To design, fabricate, and test a novel scleral contact lens with switchable telescopic magnification.
To provide a compact, wearable low-vision aid combining unmagnified and magnified vision paths.
To evaluate the optical performance and potential clinical utility of the device.

Main Methods:

Development of a 1.6 mm thick scleral lens incorporating a miniaturized F/9.7 telescope with 4 internal reflections.
Integration of a rigid gas-permeable polymer casing for the optic and achromatic correction.
Characterization using a scale-model human eye and a small-scale clinical demonstration.

Main Results:

Successful fabrication of a dual-magnification (1x and 2.8x) scleral telescopic contact lens.
The F/4.1 unmagnified path allows peripheral vision, while the F/9.7 telescope provides magnified vision.
Demonstrated functionality of the telescopic system in a simulated and preliminary clinical setting.

Conclusions:

The developed scleral telescopic contact lens shows promise as an effective, wearable low-vision aid.
The design integrates magnification and unmagnified vision with peripheral awareness.
Further research into oxygenation is needed for extended wear applications.