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Related Experiment Video

Updated: May 7, 2026

Measuring the Behavioral Effects of Intraocular Scatter

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Published on: February 18, 2021

Length measurement of the eye using a swept-source interferometer.

Haroun Al-Mohamedi, Andreas Prinz, Guido Mieskes

Biomedizinische Technik. Biomedical Engineering

|October 8, 2013

Summary

This study presents a swept-source optical setup for measuring eye axial length. The system achieved a 40 mm coherence length, enabling precise biomedical measurements of a human model eye.

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Last Updated: May 7, 2026

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Area of Science:

Biomedical Optics
Ophthalmology
Optical Engineering

Background:

Accurate measurement of ocular axial length is crucial for diagnosing and managing various eye conditions.
Existing optical measurement techniques may have limitations in terms of speed, accuracy, or range.

Purpose of the Study:

To develop and present a novel swept-source optical setup for measuring the axial length of the eye.
To demonstrate the capability of the system for biomedical data acquisition using a human model eye.

Main Methods:

A swept-source optical setup utilizing a semiconductor optical amplifier centered at 1050 nm was employed.
A tunable optical filter, comprising a reflective diffraction grating, two Littrow prisms, and a scanner, was used to achieve a large coherence length.
Interference measurements were performed on a human model eye.

Main Results:

A coherence length of 40 mm was successfully achieved, enabling measurements within this range.
Biomedical data from a human model eye were successfully acquired using the developed setup.
The need for data acquisition rates exceeding 2 MS/s for faster measurements was identified.

Conclusions:

The presented swept-source setup is capable of achieving a significant coherence length for ocular measurements.
Further optimization, including increasing data acquisition rates possibly with a field-programmable gate array, is recommended for enhanced measurement speed.