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Automated Prescription Lens Calculator

version 1.0.1 (64 KB) by Tian Chin Liew
This project presented a Diopter computation method through distance estimation using color segmentation and triangle similarities.

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Updated 14 Jul 2018

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The aim of this project is to develop a vision solution to perform simple and highly accurate eye examination for myopia patient. Automated Prescription Lens Calculator introduced a new real-time method to estimate the level of myopia (measured in Diopter1) relative to the ability a person to see a reference object clearly. The concept behind it is distance estimation using triangle similarities.

A continuous image streams is captured and preprocessed to look for desired reference object. Applying image segmentation, blob analysis, and pixel operation, together with the intrinsic parameters of camera devices, a highly accurate Diopter value is computed. Under controlled environment, we achieved up to 98% accuracy in Diopter value estimation.

Cite As

Tian Chin Liew (2020). Automated Prescription Lens Calculator (, MATLAB Central File Exchange. Retrieved .

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MATLAB Release Compatibility
Created with R2017b
Compatible with any release
Platform Compatibility
Windows macOS Linux