Automation of contact lens' fitting evaluation by digital image processing

Manuel Filipe M. Costa; Rui Barros; Sandra B. Franco

doi:10.1117/12.279561

30 October 1997 Automation of contact lens fitting evaluation by digital image processing

Manuel Filipe M. Costa, Rui Barros, Sandra B. Franco

Proceedings Volume 3164, Applications of Digital Image Processing XX; (1997) https://doi.org/10.1117/12.279561
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Contact lens' fitting evaluation is of critical importance in the contact lens' prescription process. For the correction of eye's refraction problems the use of contact lens' is very appealing to the user. However its prescription is far more demanding than the one of eye glasses. The fitting of a contact lens to a particular cornea must be carefully assessed in order to reduce possible user's physical miscomfort or even medical situations.The traditional way of easily checking the fitting of a contact lens is to perform a fluorescein test. The simple visual evaluation of the 'smoothness' of the color/brightness distribution of the fluorescence at the contact lens' location gives the optometrist an idea of the fitting's quality. We suggested the automation of the process simply by the substitution of the optometrist's eye by a CCD camera, and the use of appropriated simple image processing techniques. The setup and the digitalization and processing routines will be described in this communication. The processed images may then be directly analyzed by the optometrist in a faster, easier and more efficient way. However, it is also possible to perform an automated fitting evaluation by working out the information given by the image's intensity histograms for the green and blue RGB' channels.

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Manuel Filipe M. Costa, Rui Barros, and Sandra B. Franco "Automation of contact lens fitting evaluation by digital image processing", Proc. SPIE 3164, Applications of Digital Image Processing XX, (30 October 1997); https://doi.org/10.1117/12.279561

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KEYWORDS

Image processing

Digital image processing

Eye

CCD cameras

Cornea

Data communications

Glasses

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