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May 8, 2026PROGRESS IN BIOCHEMISTRY AND BIOPHYSICS

Compact Fundus Imaging System Using Shack-Hartmann Wavefront Sensing for High-speed Auto-focus

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Authors

ZLZhe-kai LINLCLong ChenGZGeng-yong ZHENG

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Overview

Randomized trial demonstrates enhanced autofocus precision in portable fundus cameras, indicating improved retinal imaging reliability.

Key Points

  • This study aims to develop a rapid and precise autofocus system for portable fundus cameras using wavefront sensing to counter existing limitations.
  • Developed a portable fundus camera integrating a Shack-Hartmann wavefront sensor.
  • Utilized a laser diode with oblique illumination for minimal corneal reflections.
  • Implemented real-time centroid analysis for wavefront slope mapping and closed-loop focusing control.
  • Achieved a focusing precision of 0.08 D, an 18-fold improvement over traditional methods.
  • Success rate of wavefront-sensing autofocus was 92% with a focus acquisition time averaging under 0.5 seconds.
  • Significant enhancement in image quality of retinal vasculature assessed post-focus correction.

Cite This Study

LIN et al. (2026) studied this question.

synapsesocial.com/papers/69fd7d4abfa21ec5bbf05d98https://doi.org/10.3724/j.pibb.2025.0491
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1In vivo fundus imaging and computational refocusing with a diffuser-based fundus camera2024
  2. 2Automated Pupil Center Tacking Method and Autofocusing Algorithm for Fundus Image Acquisition2026
  3. 3Peripheral Wavefront Sensor with Fixation Target Made by Optical Simulation for Measuring Human Eye Regardless of Spectacle2024
  4. 4A Miniaturized Large-Field Fundus Optical System Based on Aspheric Imaging and Non-Coaxial Illumination2024 · 1 citations
  5. 5Wide dynamic range digital aberrometry and fast anterior-segment imaging with MHz SS-OCT2024