Grading of Iris Color with an Extended Photographic Reference Set
نویسندگان
چکیده
PURPOSE: To present a new iris pigmentation classification system based on comparison of iris pigmentation to a set of 24 standard eye photographs, with the aim of gaining on accuracy and on applicability for retinal straylight studies. METHODS: A reference set of 24 eye photographs was established by ranking the photographs from least (number 1) to most (number 24) iris pigmentation. Reproducibility was tested by grading a sample of 67 eye photographs with this reference set. RESULTS: The overall variation between observers was 1.46 on a scale of 0 to 25. CONCLUSION: The new method is promising to be more accurate than existing iris color classification systems in clinical situations where objective colorimetry-based systems are not available. The method may be useful to assess iris translucency and fundus reflectance as sources of variation in retinal straylight. (J Optom 2008;1:36-40 ©2008 Spanish Council of Optometry)
منابع مشابه
Quantification and Correction of Iris Color
A system has been developed that automatically extracts the iris region from photographs, computes the iris color in CIE u ́v ́ diagram color space, and corrects the color based on a standard calibration target. This system has advantages over previous manual methods in that it (1) is much less time-consuming because it is fully automatic, (2) corrects for the variability inherent in a film-based...
متن کاملEvaluation of the Parameters Involved in the Iris Recognition System
Biometric recognition is an automatic identification method which is based on unique features or characteristics possessed by human beings and Iris recognition has proved itself as one of the most reliable biometric methods available owing to the accuracy provided by its unique epigenetic patterns. The main steps in any iris recognition system are image acquisition, iris segmentation, iris norm...
متن کاملAutomated detection of diabetic retinopathy in a fundus photographic screening population.
PURPOSE To evaluate the performance of an automated fundus photographic image-analysis algorithm in high-sensitivity and/or high-specificity segregation of patients with diabetes with untreated diabetic retinopathy from those without retinopathy. METHODS This was a retrospective cross-sectional study of 260 consecutive nonphotocoagulated eyes in 137 diabetic patients attending routine photogr...
متن کاملAssociation of rs12913832 in the HERC2 Gene Affecting Human Iris Color Variation
Introduction: Human eye colour as a physical trait is based on the developmental biology and genetic determinants of the structure known as the iris, which is part of the uveal tract of the eye. Prediction of human visible characteristics (EVCs) by genotyping informative SNPs in DNA as biological witness opens up a new avenue in the forensic genetic. Variation of iris color rely on the amounts...
متن کاملAssessment of signs of anterior blepharitis using standardized color photographs.
PURPOSE To describe a standardized technique for acquiring and viewing photographic images of eyelids, assess the reproducibility and validity of a grading protocol for signs of anterior blepharitis, and to explore whether the signs depend on the eyelid or the area of the eyelid assessed. METHODS Subjects with anterior blepharitis ranging from none to severe were examined by ophthalmologists ...
متن کامل