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Related Experiment Video

Updated: Jul 3, 2026

Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher

Simulating the Mechanics of Lens Accommodation via a Manual Lens Stretcher

Published on: February 23, 2018

In-the-spectacle-lens telescopic device.

Eli Peli¹, Fernando Vargas-Martín

¹Harvard Medical School, Schepens Eye Research Institute, 20 Staniford Street, Boston Massachusetts 02114, USA. eli.peli@schepens.harvard.edu

Journal of Biomedical Optics

|July 8, 2008

Summary

This study introduces a new in-the-lens telescope for visual impairments, improving appearance and field of view. The innovative design enhances usability for spectacle-mounted telescopic systems.

Area of Science:

Ophthalmology
Optical Engineering
Assistive Technology

Background:

Spectacle-mounted telescopic systems, like bioptic telescopes, aid individuals with visual impairments.
Traditional bioptic designs face rejection due to cosmetic concerns and limited fields of view.
Existing designs often position telescopes above the pupil, requiring head tilting to switch between magnifications.

Purpose of the Study:

To design a novel, wide-field Keplerian telescope integrated entirely within a spectacle lens.
To overcome the cosmetic and functional limitations of conventional bioptic telescopes.
To enhance the utility and aesthetics of visual aids for the visually impaired.

Main Methods:

Developed a Keplerian telescope design embedded within the spectacle lens.

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Published on: February 23, 2018

$Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter$

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Published on: September 16, 2025

Utilized embedded mirrors for optical pathway folding within the carrier lens.

Incorporated conventional lenses or curved mirrors for magnification.

Main Results:

The in-the-lens design offers a wide field of view and improved cosmetics.
Embedded mirrors and ocular positioning allow simultaneous viewing of magnified and unmagnified fields.
The design facilitates mass production as a standard ophthalmic lens blank.

Conclusions:

The novel in-the-lens telescope design significantly improves upon traditional bioptic systems.
Enhanced aesthetics and a wider field of view address key reasons for rejection.
This integrated visual aid offers a more practical and cosmetically acceptable solution for visual impairment.